cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Laelatul Qodaryani
Contact Email
jtibbsdlp@gmail.com
Phone
+6285641147373
Journal Mail Official
jtibbsdlp@gmail.com
Editorial Address
-
Location
Kota bogor,
Jawa barat
INDONESIA
Jurnal Tanah dan Iklim
Published by Balai Besar Penelitian dan Pengembangan Sumberdaya lahan Pertanian
ISSN : 14107244     EISSN : 27227723     DOI : http://dx.doi.org/10.21082/jti.v44n1.2020.19-29
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal TANAH dan IKLIM memuat hasil-hasil penelitian bidang tanah dan iklim dari para peneliti baik dari dalam maupun dari luar Balai Besar Litbang Sumberdaya Lahan Pertanian. Jurnal ini juga dapat memuat informasi singkat yang berisi tulisan mengenai teknik dan peralatan baru ataupun hasil sementara penelitian tanah dan iklim.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 257 Documents
 1   2   3   4   5 
PRESERVATION OF ORGANIC MATTER AS AFFECTED BY VARIOUS CLAY CONTENTS IN AN ACID SOIL:BENEFICIAL IMPACT ON GROUNDNUT YIELD ANDA, MARKUS; SURYANI, ERNA; KURNIA, UNDANG
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 27 (2008): Juli 2008
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n27.2008.%p

Abstract

Systematic study on the effect of various clay contents on organic C dynamic and groundnut yield (Arachis hypogea) in upland acid soils has not received any attention. The objectives of the study were: (i) to assess the capability of various soil clay contents to preserve organic C, (ii) and to relate the effects of soil clay fraction and organic C on groundnut yield of an acid soil (Ultisol). The soil clay content was artificially adjusted to 15, 30, 45, 60 and 75%. Each soil clay percentage was thoroughly mixed with finely ground rice straw at the rate equals to 0.5, 1, 2, 3, 4, and 5% of organic C. The soil was then transferred into a pot and planted with corn (Zea mays)for the first 6 months and followed by groundnut for further 6 months. The experiment was arranged in a split plot design with three replications under glasshouse conditions. Results for the first 6 months have been published elsewhere. Hence, results for the last 6 months were presented here. Soil clay was the major factor responsible for the preservation of organic C as indicated by (i) the increased soil organic C with increasing clay fraction, and (ii) the low mineralization rate as shown by CO2-C: total C ratio from low to high 75<60<45<30<15% soil clay. It is observed that every 15% clay increment could preserve another 0.3% organic C for the period of 12 months. The increased soil organic C could linearly increase groundnut yield for 15 and 30% clay and quadratic yield for 45 and 60% clay. The maximum grain yield was 25.7-27.6 g pot-1 (equals to 2.9-3.1 t ha-1), which was obtained at 30-45 % clay containing 1.8-1.9% soil organic C.
MODEL HUBUNGAN FRAKSI P DENGAN SIFAT KIMIA TANAH SAWAH PADA TIGA KELOMPOK BAHAN INDUK BERBEDA DI JAWA BARAT Susanto, Bambang; Hartono, Arif; Anwar, Syaiful; Sutandi, Atang; Sabiham, Supiandi
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 42, No 2 (2018)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v42n2.2018.135-151

Abstract

Abstrak. Akumulasi P tanah sawah di Jawa Barat sudah sangat tinggi dan ini menyebabkan P tersedia yang dapat dimanfaatkan tanaman menjadi sedikit. Bahan induk (aluvium, sedimen dan volkan) berpengaruh terhadap dinamika, proses akumulasi, dan transformasi P di dalam tanah. Penelitian ini bertujuan untuk mengetahui bentuk fraksi P dan membuat model persamaan regresi untuk mengestimasi hubungan fraksi P dengan beberapa sifat kimia tanah. Metode penelitian yang digunakan yaitu survei lapang untuk pengambilan contoh tanah dan analisis tanah di laboratorium. Lokasi penelitian adalah tanah sawah di Jawa Barat. Pengambilan contoh tanah dilakukan secara komposit pada tiga garis transek dari utara ke selatan wilayah Jawa Barat pada 60 lokasi pada lapisan tanah 0-20 cm. Penetapan fraksi P tanah di laboratorium mengikuti prosedur fraksionasi secara sekuensial sesuai metode Tiessen dan Moir yang dimodifikasi. Hasil penelitian menunjukkan bahwa akumulasi P tanah sawah di Jawa Barat didominasi fraksi residual-P, NaOH-Po dan NaOH-Pi. Ketiga fraksi ini paling banyak ditemukan pada kelompok tanah sawah berbahan induk volkanik, kemudian sedimen dan terakhir aluvium. Ada tiga faktor utama yang berpengaruh terhadap distribusi fraksi P, yaitu: 1) Fe dan Al oksida, 2) C-organik dan kadar klei tanah, dan 3) basa-basa dapat ditukar, terutama Cadd. Model persamaan regresi yang cukup baik dalam mengestimasi fraksi P tanah sawah adalah model estimasi untuk fraksi NaOH-Pi dan NaOH-Po dengan nilai R2 > 0,4 pada taraf p < 0,05.Abstract. The accumulation of P in paddy fields of West Java is high, causing low available P for plants. The parent material (alluvium, sediment and volcanic materials) influences the dynamics, accumulation, and transformation of P in the soil. This study aims to determine the relationship of P fractions with selected soil chemical properties. The research method used was a field survey for soil sampling and soil analysis in the laboratory. The research location is paddy fields in West Java. Composite soil samples from 60 locations from three transects extending from north to south of the West Java where taken from a soil depth of 0-20 cm. Determination of soil P fraction follows the sequential fractionation procedure according to the modified Tiessen and Moir method. The results showed that the accumulation of P in paddy fields of West Java was dominated by residual-P, NaOH-Po and NaOH-Pi fractions. These three fractions are most commonly found in the group of volcanic parent materials, then followed by sedimentary and alluvium parent meterials. There were three main factors that influence the distribution of the P fraction, namely: 1) Fe and Al oxides both crystalline and amorphous, 2) organic C and soil clay content, and 3) base saturation especially excheABLE Ca. The regression equation models which are quite suitable for estimating the P fraction of paddy soil are the estimation models for NaOH-Pi and NaOH-Po fractions with R2 > 0.4 at p < 0.05.
Pengaruh Pupuk Gambut terhadap Pelindian dan Serapan Logam Berat oleh Tanaman Jagung pada Tanah Gambut Subiksa, I Gusti Made; Purnomo, Joko; Suastika, I Wayan
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 44, No 1 (2020)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v44n1.2020.19-29

Abstract

Abstrak. Penelitian pelindian dan serapan logam berat oleh tanaman jagung yang dipupuk dengan pupuk gambut (Pugam) dilakukan dalam bentuk percobaan pot di rumah kaca. Penelitian bertujuan untuk menguji laju pelindian dan serapan logam berat oleh tanaman jagung yang dipupuk dengan Pugam pada tanah gambut. Penelitian menggunakan rancangan acak kelompok dengan 5 perlakuan yaitu kontrol, NPK konvensional, dan dosis Pugam 15 g pot-1, 30 g pot-1 dan 45 g pot-1 atau setara dengan 500 kg, 1000 kg dan 1500 kg ha-1. Jumlah logam berat yang terlindi dapat dideteksi dari konsentrasi logam pada air licit (leachate) yang diambil secara reguler dari dasar pot, sedangkan serapan logam berat diukur melalui analisis tanaman. Hasil penelitian menunjukkan bahwa Pugam mengandung sejumlah logam berat yaitu Cr, Pb, dan Cd dalam konsentrasi yang rendah, yaitu berturut-turut 96, 17,3, dan 1,6 mg kg-1. Sebagian dari logam berat tersebut terdeteksi pada air licit dari tanah gambut yang diberi perlakuan Pugam, namun konsentrasinya di bawah nilai ambang batas konsentrasi logam berat untuk tanaman pertanian seperti yang tercantum pada lampiran PP. 82/2001 tentang kualitas air. Logam berat Cr dan Cu cukup banyak terdeteksi pada pupuk Pugam, yaitu masing masing 96 mg kg-1 dan 1546 mg kg-1, tetapi tidak terdeteksi pada air licit,  karena kedua logam berat ini memiliki afinitas yang tinggi untuk berikatan dengan ligan organik. Logam berat Pb, As, Se dan Zn mengalami pelindian yang terdeteksi melalui air licit, tetapi konsentrasinya  berada di bawah nilai ambang batas kualitas air (PP No. 82/2001) dan tidak berkorelasi dengan perlakuan pupuk Pugam. Bobot masa akar dan biomas pada perlakuan Pugam 500 kg ha-1 meningkat masing-masing 58 kali dan 45 kali lipat dibandingkan dengan perlakuan NPK karena Pugam bila larut melepaskan kation polivalen yang mampu menetralisir asam fenolat yang beracun bagi tanaman.  Perlakuan Pugam tidak meningkatkan konsentrasi dan serapan logam berat oleh tanaman jagung. Kisaran konsentrasi logam berat adalah (mg kg-1) 1,95 – 2,79 Pb; 0,2-0,3 As; 1,45 -2,83 Cr; 0,05 Co, sedangkan Cd, Hg dan Ni tidak terdeteksi. Semua kisaran konsentrasi logam berat tersebut jauh di bawah nilai ambang batas konsentrasi yang membahayakan. Abstract. Research on heavy metal leaching and uptake by maize fertilized with “peat fertilizer”  (Pugam) on peat soil was carried out in a greenhouse. The objectives of this research were to evaluate heavy metal leaching and uptake by maize due to Pugam fertilization. The study used a randomized block design with 5 treatments namely control, conventional NPK, and 3 rates of Pugam, i.e. 15, 30, and 45 g pot-1 or equivalent to 500, 1000, and 1500 kg ha-1. The leached heavy metals were detected from the concentrations in the leachate taken regularly from the bottom of the pots, while the uptake of metals by plant were measured by plant sample analysis. The results showed that Pugam contained a number of heavy metals namely Cr, Pb, and Cd in low concentrations, namely 96, 17.3, and 1.6 mg kg-1, respectively.  Some of the heavy metals were detected in the leachate of peat soil treated with Pugam, but the concentrations were below the threshold values of heavy metal concentrations for crops as listed in the attachment of the government regulation (PP. 82/2001) concerning  water quality. Cr and Cu were detected in quite high concentrations in Pugam namely 96 and 1546 mg kg-1 respectively, but they were not detected in the leachate because both metals tend to make a strong bound with organic ligand. Heavy metals namely Pb, As, Se and Zn underwent leaching, but the concentration in leachate was below the threshold value and did not correspond to Pugam treatment. Roots and shoots biomass under 500 kg ha-1 Pugam increased 58 and 45 folds compared to NPK treatment because Pugam released polyvalent cations that neutralized phenolic acids which otherwise are toxic to plants. The Pugam treatment did not increase the concentration and uptake of heavy metals by maize. The range of  heavy metal concentrations were (mg kg-1) 1.95 - 2.79 Pb, 0.2-0.3 As, 1.45 -2.83 Cr, 0.05 Co, whereas Cd, Hg and Ni were not detected. All ranges of heavy metal concentrations were much lower than the hazardous concentration threshold values.  
PENGARUH PEMBERIAN PESTISIDA TERHADAP TRANSFORMASI ASAM FENOLAT SERTA PRODUKSI CO2 DAN CH4 PADA TANAH GAMBUT Suciati, Fuzi; Anwar, Syaiful; Dadang, Dadang; Aviantara, Dwindrata B.; Widyastuti, Rahayu
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 40, No 1 (2016)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v40n1.2016.11-23

Abstract

Abstrak. Degradasi bahan organik dari tanah gambut menghasilkan berbagai asam fenolat, CO2 dan CH4. Asam fenolat bersifat toksik dan menyebabkan terhambatnya pertumbuhan tanaman. Sebagian pestisida yang diaplikasikan jatuh ke tanah dan bereaksi dengan bahan organik tanah. Penelitian ini bertujuan mempelajari pengaruh penambahan pestisida terhadap ikatan asam fenolat pada tanah gambut serta menganalisis tingkat emisi CO2 dan CH4. Penelitian ini menggunakan 2 jenis pestisida yaitu herbisida paraquat diklorida dan insektisida Buthylphenylmethylcarbamate (BPMC). Dosis pestisida yang digunakan mengacu kepada dosis anjuran, yaitu 4 liter ha-1 untuk paraquat dan 1 liter ha-1 untuk BPMC. Perlakuan menggunakan 3 dosis (setengah, setara dan dua kali dosis anjuran: ?g kg-1): 1.104, 2.208, dan 4.416 untuk paraquat dan 485, 970, dan 1.940 untuk BPMC dengan satu kontrol. Setelah diinkubasi 1, 7, 14 dan 28 hari dilakukan analisis yang meliputi asam fenolat, residu pestisida, gugus fungsional, serta emisi CO2 dan CH4. Hasil penelitian menunjukan bahwa pemberian pestisida menurunkan jumlah asam fenolat di dalam tanah gambut. Penggunaan bahan aktif paraquat dan BPMC memperlihatkan pola yang sama terhadap perubahan konsentrasi asam fenolat dalam tanah. Dosis bahan aktif BPMC 485 ?g kg-1 menyebabkan penurunan residu pestisida lebih tinggi dibandingkan dosis yang lainnya yaitu sebesar 95% setelah 28 hari masa inkubasi. Secara umum penggunaan bahan aktif paraquat pada semua dosis yang diuji tidak meninggalkan residu setelah 28 hari masa inkubasi. Pemeriksaan gugus fungsional dengan FTIR tidak mendeteksi adanya penambahan gugus fungsional baru pada semua dosis dan jenis bahan aktif, namun perubahan intensitas puncak serapan dapat merupakan indikasi bahwa terjadi perubahan komposisi senyawa kimia dalam tanah gambut selama periode inkubasi. Penambahan pestisida tidak nyata mempengaruhi emisi CO2 dan CH4.Abstract. Degradation of organic matter from peat soil produces various phenolic acids, CO2, and CH4. The phenolic acid is known toxic and causes plant growth retardation. Some of pesticide is unintentionally drip on peat soil surface and reacts with organic matter. This study was aimed at evaluating the influence of pesticides on phenolic acid bondings as well as CO2, and CH4 emissions. Two types of pesticides were used: herbicide paraquate dichloride and insecticide Buthylphenylmethyl-carbamate (BPMC). The pesticide dosages were based on the recommended application, i.e. 4 liter ha-1 for paraquat and 1 liter ha-1 for BPMC. Treatments were consisted of 3 levels of dosage (half, equal and two-fold the recommended rates: ?g kg-1): 1,104; 2,208; and 4,416 for paraquat and 485, 970, and 1,940 for BPMC and a control treatment. After 1, 7, 14, and 28 days of incubation, soils in each treatment were analyzed for phenolic acids, pesticide residues, functional groups, and CO2 and CH4 emissions. The results showed that pesticide application reduced the total phenolic acid concentrations of peat soil. Paraquat and BPMC applications showed a similar pattern on soil phenolic acid concentrations. BPMC dosage of 485 ?g kg-1 reduced 95% of pesticide residues, which was the highest reduction compared to any other dosages. In general, paraquat application at the tested dosages left no pesticide residues after 28 days of incubation. The FTIR analysis did not detect appearance of any new functional groups under the tested rates and types of pesticides. However, altered intensity of the absorption peaks could be an indication of compositional changes of the chemical substances within peat soil during the incubation period. Pesticide application did not significantly affect CO2 and CH4 emissions.
MANAGEMENT ALLOWABLE DEPLETION (MAD) LEVEL FOR WATER USE EFFICIENCY OF CHILI ON TYPIC KANHAPLUDULTS AT TAMANBOGO, LAMPUNG HARYATI, UMI; SINUKABAN, N; MURTILAKSONO, K; ABDURACHMAN, ADI
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 31 (2010): Juli 2010
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n31.2010.%p

Abstract

Water scarcity is the main factor causing crop production decrease and harvest failure in the upland areas. To improve water use efficiency by plants, Management Allowable Depletion (MAD) concept can be applied. MAD is the degree of soil dryness that still lead to optimum crop yied. This research was aimed to: 1) determine a correct MAD-level in order to achieve the optimum water use efficiency and 2) evaluate the effect of irrigation water sources on water use efficiency. The research was carried out on a Typic Kanhapludults at Tamanbogo Experimental station, East Lampung in dry season of 2005. Chili (Capsicum annum) was use as an indicator crop. The size of experimental plot was 5 x 10 m, that was arranged in split-plot design with 3 replications. The treatments were irrigation water sources designed as main plot which consisted of: A1 = ground water A2 = surface water, while MAD-level was designed as sub-plot, which consisted of : I1 = 20% of available water, I2 = 40% of available water, I3 = 60% of available water, I4 = 80% of available water, and I5 = 100% of available water. Irrigation was provided to reach 80, 60, 40, and 20% available water respectively. For the I5 treatment, irrigation was applied every day. The results showed that MAD-level of 60% of available water (I3) with the average of 9.6 mm of irrigation water, applied every three days, gave themost optimum crop yield and water use, thus achieving the highest water use efficiency. The surface irrigation water had a better quality than ground water,leading to a better plant growth, a higher crop yield and a higher water use efficiency than ground water
PREDIKSI AWAL MUSIM HUJAN BERDASARKAN INDEKS VARIABILITAS IKLIM DI PULAU JAWA Rohmawati, Fithriya Yulisiasih; Boer, Rizaldi; Faqih, Akhmad
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 38, No 1 (2014)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v38n1.2014.35-42

Abstract

Abstrak. Informasi terkait awal musim hujan (AMH) memiliki peranan penting dalam penyusunan strategi tanam guna meningkatkan hasil pertanian yang optimum. Penelitian ini bertujuan menyusun model prediksi AMH di Jawa sebagai daerah sentra pangan di Indonesia menggunakan indeks variabilitas iklim seperti El Nino Southern Oscilation (ENSO), El Nino Modoki, Indian Ocean Dipole (IOD) dan Sea Surface Temperature (SST) serta Madden Julian Oscillation (MJO). Model persamaan AMH disusun menggunakan model regresi linier dan skill model prediksi dievaluasi menggunakan Relative Operating Characteristics (ROC). Hasil penelitian menunjukkan bahwa ENSO (indeks anomali SST Nino 3.4) menjelaskan sebagian besar variabilitas AMH di Jawa. Oleh karena itu, ENSO bulan Juli dan Agustus digunakan sebagai prediktor AMH. Model persamaan yang disusun berdasarkan indeks tersebut mempunyai skill baik. Rata-rata skill model prediksi mencapai 84% (ENSO bulan Juli) dan 76% (ENSO bulan Agustus) untuk AMH maju dari normal dan 83% (ENSO bulan Juli) dan 86% (ENSO bulan Agustus) untuk AMH mundur dari normal. Dengan hasil tersebut, maka model persamaan dalam penelitian ini cukup dapat memberikan solusi terhadap masalah keakuratan informasi AMH terutama untuk AMH mundur dari normal yang berdampak pada kegagalan panen. Abstract. Monsoon onset information plays an important role in setting up planting strategy for achieving optimum yield. This study aimed to develop forecasting model for the monsoon onset in main rice growing areas of Java, Indonesia using climate variability indices, namely the El Niño Southern Oscillation (ENSO), El Nino Modoki, Indian Ocean Dipole (IOD), and Sea Surface Temperature (SST) and Madden Julian Oscillation (MJO). The forecasting models of the monsoon onset were developed using a linear regression model and that skill of the prediction models were evaluated using Relative Operating Characteristics (ROC). It was found that ENSO (anomaly SST Nino 3.4) explained most of the variability of monsoon onset across Java. Therefore, the SST Nino 3.4 index (in July and August) can be used as one of predictors for predicting the onset. The models developed using this index have a better skill. The average skill of the models for forecasting advanced monsoon onset reached 84% (July?s ENSO) and 76% (August?s ENSO), then for the delayed monsoon onset reached 83% (July?s ENSO) and 86% (August?s ENSO). According to this result, the equation?s model can provide a sufficient solution for the accuracy of monsoon onset information particularly if there is a delay in monsoon onset that can lead to the crop failure.
NITROGEN TRANSFORMATION IN FLOODED SOIL : APPLICATION OF RICE STRAW AND RICE STRAW COMPOSTS AND ITS EFFECT ON NITROGEN UPTAKE AND ACETYLENE REDUCTION ACTIVITY IN RICE PLANT RHIZOSPHERE INDRIYATI, L.T; SABIHAM, SUPIYANDI; DARUSMAN, L.K; SITUMORANG, R.; SUDARSONO, .; SISWORO, W.H
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 26 (2007): Desember 2007
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n26.2007.%p

Abstract

The use of organic materials aimed in reducing the dependence on inputs such as chemical fertilizers can contribute to sustainability and improving the low N fertilizer efficiency of rice plants in paddy soils. Therefore, better understanding of N transformation in flooded soils, particularly the microbial transformation of N-organic amendments to plant-available N, is needed for most efficient use of soil and organic materials N for aiding in the selection of N management practices for sustainable agriculture. The experiments were conducted at the laboratory and in the greenhouse of Soil Department, Faculty of Agriculture, Bogor Agricultural University. Incubation experiment was conducted at room temperature for 120 days to observe the availability of N-NH4+ in soil amended rice straw or rice straw composts and its combination with urea. After 21 days of incubation period, the rice straw amended soils showed that NNH4+ release was higher than the other treatments. The 4-monthand 8-month-compost of rice straw showed that N mineralization rate was lower and the N availability was lower than rice straw. The results of pot experiment in greenhouse revealed that the added rice straw was comparable with urea in its effect on the increase of dry matter weight of rice plants, number of tillers, Nuptake of rice, and recovery N efficiency. The application of rice straw, however, promoted the activity of nitrogenase enzyme higher than rice straw composts. The effect of rice straw on observed parameters were much better than its composts.
PENGARUH BIO-NANO SILIKA TERHADAP HASIL DAN EFISIENSI PENGGUNAAN AIR KEDELAI HITAM DI LAHAN KERING MASAM Santi, Laksmita Prima; Goenadi, Didik Hadjar; Barus, Junita; Dariah, Ai
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 42, No 1 (2018)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v42n1.2018.43-52

Abstract

Abstrak. Kebutuhan kedelai hitam nasional masih tergantung pada pasokan dari luar negeri dan terkendala oleh rendahnya produktivitas. Oleh karena itu, pemanfaatan lahan marginal secara optimal perlu didorong untuk budidaya kedelai hitam. Optimalisasi lahan kering masam dihadapkan pada faktor utama pembatas tanah antara lain kemasaman tanah tinggi, air tersedia terbatas, dan efisiensi penggunaan unsur hara rendah. Silika (Si) dalam bentuk yang siap diserap oleh tanaman (asam silikat) mampu meningkatkan toleransi tanaman terhadap cekaman kekeringan dan meningkatkan efisiensi penggunaan hara. Tujuan penelitian ini untuk mengetahui pengaruh aplikasi bio-nano silika di lahan kering yang bereaksi masam terhadap: (i) hasil kedelai hitam, dan (ii) efisiensi penggunaan air. Kegiatan lapang dilaksanakan di Jatitujuh, Majalengka, Jawa Barat, pada bulan Juli-Oktober 2017 dengan menggunakan rancangan acak kelompok (RAK). Pupuk bio-nano silika diberikan dengan dosis 0, 2, 4, dan 6 L ha-1, sedang pupuk N, P, dan K tunggal diberikan setara dengan 0, 50, 75, dan 100% dosis rekomendasi. Plot kontrol berupa perlakuan standar petani (100% N, P, dan K + 2 ton ha-1 pupuk organik). Plot berukuran 100 m2 dari setiap perlakuan ditanami kedelai hitam varietas Detam-1. Pupuk bio-nano silika diekstraksi dari pasir kuarsa 325 mesh menggunakan larutan asam dan basa. Pupuk bio-nano silika mengandung kadar H4SiO4 > 5% dengan ukuran partikel 18 nm dan dalam aplikasinya diperkaya dengan mikroorganisme pelarut Si, yaitu Aeromonas punctata, Burkholderia cenocepacia, B. vietnamiensis, dan Aspergillus niger. Hasil percobaan menunjukkan bahwa hasil biji kedelai nyata tertinggi diperoleh pada perlakuan 75% NPK + 2 L bio-nano silika ha-1. Aplikasi 4 L ha-1 bio-nano silika dapat menghemat dosis pupuk N, P, dan K sampai dengan 32%. Sementara aplikasi dengan dosis 6 L ha-1 bio-nano silika dapat meningkatkan hasil kedelai hitam var. Detam-1 sampai dengan 36,7% dan menekan kebutuhan air tanaman hingga 65%.Abstract. National black soybean demand is still dependent on import supply and limited by its low productivity. Therefore, the utilization of marginal land needs to be driven for development of black soybean cultivation. The main limiting factors of acid dry land soils are high soil acidity, limited water availability and low nutrients use efficiency. Silica (Si) in plant-available form (silicic acid) is able to improve plant drought tolerance and nutrient use efficiency. The objective of this study was to determine the effect of the application of bio-nano-silica in acid dry land to: (i) black soybean productivity, and (ii) the efficiency of water use. The research was conducted in Jatitujuh area, Majalengka, West Java, in July-October 2017, by using a randomized block design. Bio-nano silica was applied at 0, 2, 4, and 6 L ha-1, whereas single N, P, and K fertilizers were given at 0, 50, 75, and 100% of recommended rate in three replicates and on a 100 m2 plot size each, with control plot and farmer?s standard practice plot (100% N, P, and K + 2-ton ha-1 of organic matter). Bio-nano silica was prepared from a 325-mesh quartz sand using acid base solution extraction method and containing > 5% H4SiO4 with 18 nm particle size applied in combination with selected Si-solubilizing microorganism, i.e. Aeromonas punctata, Burkholderia cenocepacia, B. vietnamiensis, and Aspergillus niger. The results showed that the highest yield of soybean seed obtained in treatment 75% NPK + 2 L bio-nano silica ha-1. Application of 4 L ha-1 bio-nano silica saved of 32% N, P, and K fertilizer dosage. Furthermore, 6 L ha-1 bio-nano silica improved bean production of Detam-1 var up to 36.7% and reduced water consumption by 65%.
USE OF EARTHWORM TO INCREASE UPLAND ULTISOLS PRODUCTIVITY SUBOWO, .; ANAS, I.; DJAJAKIRANA, G.; ABDURACHMAN, A.; HARDJOWIGENO, S.
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 20 (2002): Desember 2002
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n20.2002.%p

Abstract

Research conducted to identify the habitat and population of earthworm in upland Ultisols, was to study the effect of ameliorant (lime and organic matter) on Ultisols as earthworm habitat in simple bamboo house experiment, to evaluate the activity of earthworm (Pheretima hupiensis) atvarious ameliorant amandment in a terrarium, the use of earthworm to increase soybean yield on Typic Palehumults. The results showed that earthworm population in Ultisols was dominated by P. hupiensis. The constraints of P. hupiensis population in wet season are low P2O5 content and high soil surface temperature at noon time. In transition from wet to dry season the constraints are high soil strength and C:N ratio soil organic matter. In dry season the constraint is low availability of water. No tillage with vertical application of organic matter and lime was the best treatment to improve the P. hupiensis activities in the argillic horizon. P. hupiensis decrease argilic horizon bulk densities, deposits casting around the rhizosfer area to improve soil nutrients absorbtion; hence, increase the upland Ultisols productivity. Population of P. hupiensis has a positive significant correlation with soybean var. Willis growth in upland Typic Palehumults with 1.19 g/ml bulk density and 12 cm-deep argillic horizon.
PENGARUH ASAM HUMAT TERHADAP PERTUMBUHAN BIBIT KAKAO (THEOBROMA CACAO) DAN POPULASI MIKROORGANISME DI DALAM TANAH HUMIC DYSTRUDEPT Santi, Laksmita Prima
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 40, No 2 (2016)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v40n2.2016.87-94

Abstract

Abstrak: Asam humat merupakan bahan organik alam yang ketersediaannya cukup melimpah dan berpotensi dalam meningkatkan pertumbuhan tanaman. Peran asam humat dalam meningkatkan kadar hara bagi bibit kakao dan perkembangbiakan bakteri serta sifat kimia Humic Dystrudept tekstur berpasir menjadi fokus utama dalam riset ini. Kegiatan riset ini dilaksanakan di Pusat Penelitian Bioteknologi dan Bioindustri Indonesia pada tahun 2014. Populasi Azotobacter beijerinckii dan Aspergillus niger di dalam tanah dievaluasi di laboratorium. Perlakuan dengan penambahan 0; 2,5; 5,0; 7,5; 10,0; and 12,5 mL asam humat ke dalam 10 kg tanah steril. Sementara itu pengujian di rumah kaca untuk mengetahui pengaruh asam humat terhadap pertumbuhan bibit kakao didesain dengan Rancangan Acak Lengkap dengan dua belas perlakuan dan tiga ulangan melalui penambahan 25; 50; 75; 100 % dosis pupuk NPK; 3,75; 7,5; 11,25; dan 15 mL asam humat; 100% NPK + 7,5 mL asam humat; 50% NPK + 7,5 mL asam humat; 25% NPK + 7,5 mL asam humat ke dalam 10 kg tanah; dan blanko (tanpa pupuk dan asam humat). Berdasarkan penelitian ini diketahui bahwa penambahan asam humat memiliki korelasi positif terhadap peningkatan populasi mikroorganisme tanah dan serapan hara. Kelimpahan terbesar dari populasi A. beijerinckii dan A. niger diperoleh pada penambahan 7,5-12,5 mL asam humat. Penambahan asam humat serta kombinasinya dengan pupuk NPK dapat meningkatkan kadar hara daun N (5,7%), P (21,4%), dan K (17,2%) serta 5,4 - 41,7% bobot kering bibit kakao. Abstract. Humic acid is a natural organic material relatively abundant and potentially be used to improve plant growth. The role of humic acid in improving nutrient content of cocoa seedlings and in improving the growth of soil bacteria and fungi, as well as improving chemical properties of sandy Humic Dystrudept were the main foci of this research. This research was carried out at Indonesian Research Institute for Biotechnology and Bioindustry in 2014. Population of Azotobacter beijerinckii and Aspergillus niger in the soil were evaluated in the laboratory. Treatments were the addition of 0; 2.5; 5.0; 7.5; 10.0; and 12.5 mL humic acid into 10 kg of sterile soil. The greenhouse experiment to determine the effects of humic acid on the growth of cocoa (Theobroma cacao) seedlings was arranged in a completely randomized design with three replications and twelve treatments: 25; 50; 75; 100 % dosages of NPK fertilizer; 3.75; 7.5; 11.25; and 15 mL humic acid; 100% NPK + 7.5 mL humic acid; 50% NPK + 7.5 mL humic acid; 25% NPK + 7.5 mL humic acid into 10 kg of soil; and blank (without fertilizer and humic acid). The results of these research showed that humic acid have a positive correlation in increasing soil microbial population and nutrient uptake. The most abundant population of A. beijerinckii and A. niger were under the addition of the 7.5-12.5 mL of humic acid. The addition of humic acid and its combination with NPK fertilizer increased N content 5.7%, P content 21.4%, and K contents 17.2% in cocoa seedling leaves and seedling dry weight 5.4 - 41.7%. 

Page 3 of 26 | Total Record : 257

 1   2   3   4   5 

Filter by Year

2000 2022


Reset
Filter By Issues
All Issue Vol 46, No 1 (2022): Akan Terbit Resmi pada Juli 2022 Vol 45, No 2 (2021) Vol 45, No 1 (2021): (Akan Terbit Resmi pada Bulan Juli) Vol 45, No 1 (2021) Vol 44, No 2 (2020) Vol 44, No 1 (2020) Vol 43, No 2 (2019) Vol 43, No 1 (2019) Vol 42, No 2 (2018) Vol 42, No 1 (2018) Vol 41, No 2 (2017) Vol 41, No 1 (2017) Vol 40, No 2 (2016) Vol 40, No 1 (2016) Vol 39, No 2 (2015) Vol 39, No 1 (2015) Vol 38, No 2 (2014) Vol 38, No 1 (2014) Vol 37, No 2 (2013) Vol 37, No 1 (2013) No 34 (2011): Desember 2011 No 33 (2011): Juli 2011 No 32 (2010): Desember 2010 No 31 (2010): Juli 2010 No 30 (2009): Desember 2009 No 29 (2009): Juli 2009 No 28 (2008): Desember 2008 No 27 (2008): Juli 2008 No 26 (2007): Desember 2007 No 25 (2007): Juli 2007 No 24 (2006): Desember 2006 No 23 (2005): Desember 2005 No 22 (2004): Desember 2004 No 21 (2003): Desember 2003 No 20 (2002): Desember 2002 No 19 (2001): Desember 2001 No 18 (2000): Desember 2000 More Issue