Article Per Year (5 Year)
p-Index From 2020 - 2025
2.844
P-Index
This Author published in this journals
All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Buletin Agrohorti Jurnal Ilmu Pertanian Indonesia Jurnal Hortikultura Indonesia (JHI) MEDIA KONSERVASI Forum Pasca Sarjana Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Reaktor Bioma : Berkala Ilmiah Biologi SAINS DAN MATEMATIKA Jurnal Ilmu Lingkungan Jurnal Natur Indonesia Ganendra: Majalah IPTEK Nuklir Jurnal Ilmiah Aplikasi Isotop Radiasi Microbiology Indonesia BIOTROPIA - The Southeast Asian Journal of Tropical Biology Journal of Tropical Soils Jurnal Sosial Ekonomi Pertanian Jurnal Agro Teknologi Tropika Indonesian Journal of Agricultural Science Jurnal Hortikultura Jurnal Agro Ekonomi Jurnal Pengkajian dan Pengembangan Teknologi Pertanian Jurnal Sumberdaya Lahan Buletin Penelitian Tanaman Rempah dan Obat JTSL (Jurnal Tanah dan Sumberdaya Lahan) Wacana, Jurnal Sosial dan Humaniora Journal of Degraded and Mining Lands Management AGRIVITA, Journal of Agricultural Science Jurnal Solum Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Planta Tropika Jurnal Tataloka MAJALAH ILMIAH GLOBE SAINS TANAH - Journal of Soil Science and Agroclimatology Jurnal Penelitian Pertanian Tanaman Pangan Journal of Regional and Rural Development Planning Jurnal Penelitian Kelapa Sawit EKOLOGIA : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup JURNAL PANGAN Jurnal Agro Ekonomi Buletin Penelitian Tanaman Rempah dan Obat Jurnal Sumberdaya Lahan Jurnal Tanah dan Iklim
Atang Sutandi
Departemen Ilmu Tanah Dan Sumber Daya Lahan, Fakultas Pertanian Institut Pertanian Bogor, Jl. Meranti Kampus IPB Dramaga Bogor 16680
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Immunology & microbiology Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Social Sciences Veterinary Other

Published : 106 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 106 Documents
Search

 1   2   3   4   5 
Fosil Polen Mangrove Berumur Pliosen Dari Formasi Tapak Daerah Kedung Randu, Banyumas Agung Suedy, Sri Widodo; Muhadiono, Muhadiono; Sabiham, Supiandi; Qoyim, Ibnul
Bioma : Berkala Ilmiah Biologi Vol. 14, No.1, Tahun 2012
Publisher : Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (630.001 KB) | DOI: 10.14710/bioma.14.1.17-24

Abstract

Thirty sediment samples had been taken from the Tapak Formation of Kedung Randu areas, Banyumas, to reconstruct the diversity of mangrove flora from this area the past. This samples were processed for palynological slides used standard palynology preparation method. The microscopic identification of palynomorphs were done to identify taxa of paleoflora. Fifty-six types of pollen and spores fossils had been identified and 22 types were mangrove pollen-spores fossils. This fossils could be grouped into major mangrove (Zonocostites ramonae/Rhizophora type, Spinizonocolpites echinatus/Nypa fruticans, Florschuetzia levipoli/Soneratia caseolaris and Avicennia type); group of minor mangrove (Retitricolporites sp./Excoecaria sp., Discoidites novaguenensis/Brownlowia type, Camptostemon and Acrostichum aureum), and a group of plant associations (Retitricolporites equatoralis/Calophyllum type, Dicolpopollis sp./Calamus type, Racemonocolpites sp./Oncosperma, Marginipollis concinus/Barringtonia, Pandaniidites sp. /Pandanus, Terminalia catappa, Ilexpollenites sp./Ilex, Stellatopollis sp./Croton type, Acanthaceae type, Cyperaceaepollis/Cyperaceae, Podocarpidites/Podocarpus, Aglaia type, Haloragacidites/ Casuarina and Verrucatosporites usmensis/Stenochlaena palustris. Stenochlaeniidites papuanus and Podocarpus imbricatus were found in the samples. Tapak Formation was included in the last section of the Podocarpus imbricatus/Dacrycarpidites australiensis Zone of Java Palynological Zonation, and this formation was in the age of Late Pliocene towards Pleistocene. Key word: Tapak Formation; major-minor-plant associations of mangrove; palynological zonation
Analisis Keberlanjutan Wilayah Perbatasan Kalimantan Barat-Malaysia untuk Pengembangan Kawasan Agropolitan (Studi Kasus Kecamatan Dekat Perbatasan Kabupaten Bengkayang) Thamrin, nFN; Sutjahjo, Surjono H.; Herison, Catur; Sabiham, Supiandi
Jurnal Agro Ekonomi Vol 25, No 2 (2007): Jurnal Agro Ekonomi
Publisher : Pusat Sosial Ekonomi dan Kebijakan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jae.v25n2.2007.103-124

Abstract

EnglishThe Government of Bengkayang Regency has decided that the border area is one of the agropolitan region development programs. Hence, a study on the sustainability level of border area as the agropolitan region development is required.  The first objective of this study was to analyze the index and sustainability status of the border area, Bengkayang Regency, based on five sustainable dimensions. The analysis used Multi Dimensional Scaling (MDS) Method, called Rap-BENGKAWAN and the results were stated in the index and sustainability status. The second objective was to analyze the attributes that affect sensitively on index and sustainability status and the effect of error using Laverage and Monte Carlo Analysis. The results of the study revealed that ecological dimension was in the status of less sustainable (40.37%), economical dimension was sufficient sustainable (66.54%), socio-culture dimension was sufficient sustainable (67.06%), dimension of infrastructure and technology was not sustainable (24.49%) and dimension of law and institutional was sufficient sustainable (60,10).  Out of the 47 attributes analyzed, there were 22 attributes need to be handled immediately as they affect sensitively on the increase of index and sustainability status with a negligible error in the level of 95% confidence limit. IndonesianPemerintah Kabupaten Bengkayang menetapkan wilayah perbatasan sebagai salah satu program pengembangan kawasan agropolitan. Untuk itu, perlu dikaji tingkat keberlanjutan wilayah perbatasan sebagai kawasan pengembangan agropolitan. Penelitian ini bertujuan untuk menganalisis indeks dan status keberlanjutan wilayah perbatasan Kabupaten Bengkayang dari lima dimensi keberlanjutan. Analisis menggunakan metode Multi-Domensional Scaling (MDS) yang disebut Rap-BENGKAWAN dan hasilnya dinyatakan dalam bentuk indeks dan status keberlanjutan. Untuk mengetahui atribut yang sensitif berpengaruh terhadap indeks dan status keberlanjutan dan pengaruh galat, dilakukan analisis Laverage dan Monte Carlo. Hasil analisis menunjukkan bahwa dimensi ekologi berada pada status kurang berkelanjutan (40,37%), dimensi ekonomi cukup berkelanjutan (66,54%), dimensi sosial-budaya cukup berkelanjutan (67,07%), dimensi infrastruktur dan teknologi tidak berkelanjutan (24,49%), dan dimensi hukum dan kelembagaan cukup berkelanjutan (60,10%). Dari 47 atribut yang dianalisis, 22 atribut yang perlu segera ditangani karena sensitif berpengaruh terhadap peningkatan indeks dan status keberlanjutan dengan tingkat galat (error) yang sangat kecil pada taraf kepercayaan 95%.
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.
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.
BIODIVERSITAS DAN SIFAT KIMIA TANAH PADA EKOSISTEM LADA DAN UBI KAYU DI LAMPUNG TIMUR Irawati, Arfi; Widyastuti, Rahayu; Sutandi, Atang; Idris, Komaruddin
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.v40n1.2016.51-59

Abstract

Abstrak. Biodiversitas tanah dipengaruhi oleh ekosistem lahan pertanian dan biodiversitas menggambarkan kesuburan tanah. Penelitian ini bertujuan untuk mempelajari pengaruh ekosistem lada (Piper nigrum) dan ubi kayu (Manihot esculenta) terhadap keragaman fauna tanah, mikroba tanah fungsional dan sifat kimia tanah. Pengambilan contoh tanah dilaksanakan di Kabupaten Lampung Timur pada akhir musim kemarau pada bulan Agustus 2013. Hasil identifikasi pada ekosistem lada dan ubi kayu menunjukkan bahwa terdapat 11 taksa biota tanah yang terdiri dari kelompok mesofauna (Acari dan Collembola) dan kelompok makrofauna ( Aranea, Chilopoda, Coleoptera, Diplura, Diplopoda, Hymenoptera, Isopoda, Isoptera dan Pseudoscorpion). Total kelimpahan fauna tanah yang ditemukan sebanyak 17529 individu terdiri dari 7210 individu pada ekosistem lada dan 10319 individu pada ekosistem ubi kayu. Populasi azotobacter, mikroba selulotik dan total bakteri pada ekosistem lada berbeda secara signifikan dengan ekosistem ubi kayu, sedangkan populasi bakteri pelarut fosfat dan total fungi tidak berbeda nyata. Sifat kimia tanah tidak berbeda signifikan antara kedua ekosistem ini. Berdasarkan analisis diskriman diketahui bahwa KTK, ldd, C-organik, pasir, liat dan total bakteri memiliki nilai fungsi sebagai faktor pembeda dan sifat-sifat ini dapat dimanfaatkan sebagai basis untuk pengelolaan tanah pada ekosistem lada dan ubi kayu.Abstract. Soil biodiversity is influenced by agricultural ecosystems and the biodiversity is an indicator of soil fertility. The objective of this research were to evaluate the effects of pepper (Piper nigrum) and cassava (Manihot esculenta) ecosystems on soil fauna biodiversity, population of functional microbes, and soil chemical properties. Soil samples were taken from East Lampung District in the end of dry season (August) 2013. The identification revealed 11 taxa of soil biota, i.e. group of mesofauna (Acari and Collembola) and group of macrofauna (Araneae, Chilopoda, Coleoptera, Diplura, Diplopoda, Hymenoptera, Isopoda, Isoptera, and Pseudoscorpion). The total abundance of soil fauna was 17529 individuals; 7210 in pepper and 10319 in cassava, but there was no significant difference in mean soil fauna abundance between the two ecosystems. Azotobacter, cellulotic and total bacteria showed significant differences in the abundance between pepper and cassava ecosystems, but the significant difference was not detected for phosphate solubilizing bacteria and total fungi. The soil chemical characteristics were not different between the two ecosystems. Based on the discriminant analysis, the variables that differentiated the two ecosystems were cation exchange capacity, exchangeable Al, organic carbon content, sand content, clay content, and total bacteria. These variables can be used as the basis for managing the pepper and casava ecosystems. 
Exploration of lignocellulolytic microbes in oil palm rhizosphere on peat soils and their respiration activities Happy Widiastuti; Siswanto; Saeful Anwar; Supiandi Sabiham; Husni Mubarok; Darmono Taniwiryono; Basuki Sumawinata; Heru B. Pulunggono
Microbiology Indonesia Vol. 15 No. 1 (2021): March 2021
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (798.494 KB) | DOI: 10.5454/mi.15.1.5

Abstract

Microbial respiration in peatlands plays a role in contributing CO2 emissions. Studies of microbial exploration and respiration on peat soils in oil palm plantations have not been widely reported. This study aims to explore lignocellulolytic microbes found in peat soils in compared with mineral soils planted with 12-year-old oil palm. Exploration is done by growing the samples on the specific medium of each group of microbial functions. In the next stage, the culture obtained was analysed the respiration activity based on the oxidation of peroxidase catalysis using a chromogen substrate (tetramethylbenzidine) and measured using spectrophotometry at a wavelength of 450 nm. The results showed that both in mineral and peat planted with oil palm in a depths of 0-20 cm were found lignolytic fungi with a population of 17 x 102. Similar results were also found in peat with fern vegetation but at a depth of 20-40 cm. Lignolytic bacteria (methylene blue degradation) can be found on peat soils planted with oil palm at a depth of 0-60 cm and the population increases with increasing depth. This bacterium is also found on peat soils with fern vegetation and mineral soils planted with palm. At a depth of 0-20 cm the population of lignolytic bacteria in non-oil palm peat is highest. Cellulolytic bacteria were isolated at a depth of 0-60 cm. Cellulolytic bacterial populations were highest in oil palm peat at all depths compared to other samples. Respiration analysis of several dominant isolates showed fairly high variation between microbial function groups and within the same function group. The lignolytic microbial group degrading methylene blue showed high respiration activity and varies greatly (0.19-1.85 MER). While the respiration activity of cellulolytic bacteria ranged from 0.45 to 0.62 MER.
Effectivity of Soil Amelioration on Peat Soil and Rice Productivity Septiyana, .; Sutandi, Atang; Indriyati, Lilik Tri
JOURNAL OF TROPICAL SOILS Vol 22, No 1: January 2017
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2017.v22i1.11-20

Abstract

Peat soil amelioration has important role on improvement of soil peat fertility such as  on increasing soil pH,  reducing organic acid and toxic ions, and also increasing nutrients availability.  Soil amelioration with polyvalent cations (Fe Al Cu Zn) namely slag, lateritic soils, and river mud are effectively reducing harmful effect of phenolic acid. The objectives of the study were to determine the effect of soil amelioration on peat soil chemical properties, optimum temperature amelioran tras and dolomite to increase Si concentration in peat soil, also to determine the effect of soil amelioration on increasing crop productivity (both biomass and yield).  The study was consisted of two sets of experiments, namely soil incubation in the laboratory and greenhouse experiment with 4 replications of CRD (complete randomized design) plot design.  The result of the study showed that  the application of slag and dolomite are significantly different to increase pH, base saturation, and (Ca, Mg) content, meanwhile slag application was more complex and stable on improving chemical properties of peat soil.  Slag was also improving pH, KB, and Ca, Fe content  as well as silica and ash.  Tras and dolomite burning were not significantly different on increasing silica in peat soil. Slag application was significantly increased both dried crop biomass and yield on rice.  The best ameliorant was slag compared to tras, dolomite, and mixed tras dolomit with slag.Keywords: Ameliorant, organic acids, paddy, peat soil
Perbedaan Kebutuhan Nitrogen untuk Produksi Kedelai di Tanah Mineral dan Mineral Bergambut Dengan Budidaya Jenuh Air -, Bachtiar; Ghulamahdi, Munif; Melati, Maya; Guntoro, Dwi; Sutandi, Atang
Jurnal Penelitian Pertanian Tanaman Pangan Vol 35, No 3 (2016): Desember 2016
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (197.847 KB) | DOI: 10.21082/jpptp.v35n3.2016.p217-227

Abstract

Development of soybean (Glycine max (L) Merr.) in tidal land are faced with problems physical, chemical and biological soil properties, such as high organic matter, high soil acidity, toxicity of Fe and Al, and deficiency of nutrients N, P , K, Ca and Mg. N content is high (> 0.51%) but with low availability.  The research objective is to determine the dose and timing of N, P and K application in accordance with the needs of soybean plants to have optimally growth and production in mineral and peaty mineral soil in tidal land. The research was conducted in mineral and peaty mineral soil of tidal land type C and B, District of Tanjung Lago, Banyuasin Regency, Province of South Sumatra from April to August 2014. The model is linear using split plots in a randomized block design. Varieties of Willis and Tanggamus were used for nitrogen application experiment.  The time of fertilizer application is at 2, 3 and 4 weeks after planting (WAP), 2, 3, 4 and 5 WAP, and 2, 3, 4, 5 and 6 WAP. The concentration of nitrogen is 7,5; 10; 12,5 and 15 g/l water with spraying volume of 400 l/ha.  In the mineral soil, dry weight of nodules and Willis biomass increased with increasing frequency time of fertilization, otherwise Tanggamus more fluctuating and declined at higher frequency of fertilization. Wilis variety generating the highest production of 3,5 ton/ha.  In the peaty mineral soil, dry weight of nodules and biomass were not significant.  Willis productivity tends to decrease with increasing nitrogen concentrations.  Tanggamus productivity tends to increase with increasing nitrogen concentration at all level of time fertilization.  Tanggamus tend to generate higher productivity of 3,2 ton/ha.
Fluks Metana dan Karakteristik Tanah pada Beberapa Macam Sistem Budidaya , Suprihati; Iswandi Anas; Supiandi Sabiham; Gunawan Djajakirana
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 34 No. 3 (2006): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (59.427 KB) | DOI: 10.24831/jai.v34i3.1299

Abstract

Methane (CH4) is an important greenhouse gas that has a high heat trapping capacity thus potentially contribute to the global-warming.  Agriculture is considered among the responsible emission sources of CH4. Relationship among soil characteristics, soil microbes, and CH4 flux is very important in understanding the mechanism involved in the mitigation effects of certain agriculture practices. Results of this research showed that rice field produced the highest CH4 flux (7.4976 ± 0.5299 mg CH4-C m-2 h-1, n=3), while vegetable, sweet potato, yam bean and corn cropping produced lower CH4 flux (-0.7708 ± 0.6434 to 0.4605 ± 0.5255 mg CH4-C m-2 h-1, n=3). Nitrifier population among cropping systems was 3.13x103 to 3.17x104  MPN g-1 soil (dry weight), while denitrifier population was 3.77x103 to 1.17x105 MPN g-1 soil (dry weight).  There were no specific dominance proportion of nitrosomonas, nitrobacter, denitrifier and total propagule among cropping systems. The CH4 flux had highly correlation to soil water content (r = 0.951), soil pH (r = 0.852) and soil Eh (r = -0.982). Denitrifier had significantly correlation to soil pH (r = -0.635) and soil ammonium content (r =  -0.681).   Key words :  CH4 flux, cropping system, soil characteristic, soil microbes
Efisiensi Serapan Hara dan Hasil Padi pada Budidaya SRI di Persawahan Pasang Surut dengan Menggunakan Kompos Diperkaya Fakhrur Razie; Iswandi Anas; Atang Sutandi; , Sugiyanta; Lukman Gunarto
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 41 No. 2 (2013): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (418.378 KB) | DOI: 10.24831/jai.v41i2.7509

Abstract

There are two main problems when system of rice intensification (SRI) cultivation is carried out at tidal areas, e.g. the presence of Fe which is potentially toxic to plants and low nutrients availability. Utilization of Azotobacter-enriched compost is a choice to overcome iron toxicity as well a source of nutrients. The aims of this research were to study the effect of Azotobacter enriched compost to reduce the rates of inorganic fertilizers applied, to increase the efficiency of N, P, and K uptake, and to increase plant growth and yield. Two rice cultivation methods were applied namely SRI and conventional rice cultivation methods on tidal lands (rice fields) of South Kalimantan. A completely randomized block design with two factors was applied. The main plots were SRI and conventional rice cultivation, and as subplots were eight types of fertilizer that is a combination between Azotobacter-enriched compost with inorganic fertilizers rates. The results showed that soil nutrient availability, uptake and efficiency of N, P, and K with SRI technique was higher than conventional cultivation. Azotobacter- enriched compost on the tidal land (rice fields) could reduce the use of N and K fertilizer by 25%. Furthermore, the efficiency of N and P uptake in enriched compost with 75% of fertilizer N, P, and K were not different with enriched compost with 75% of fertilizer. Ciherang rice yields with SRI cultivation was approximately 22% higher compared to that from conventional rice cultivation. Keywords: Azotobacter-enriched compost, conventional rice cultivation, inorganic fertizers
Co-Authors -, Bachtiar -, Manuwoto . ACHMADI . NURWADJEDI . Suwarno A.A. Ketut Agung Cahyawan W Abdul Hasyim Sodiq Abdul Rachim Abdurrani Muin Adhy Ardiyanto Agung Lukman Agus Sofyan Alce Ilona Noyaa Anas D Susila Anas D Susila Anas D. Susila Anas D. Susila Anas Dinurrohman Susila Andrea Emma Pravitasari, Andrea Emma Anggi Nico Flatian, SP Aris Poniman Baba Barus Bachtiar Bachtiar Bambang Paramudya Bambang S Purwoko Bandung Sahari Bandung Sahari BANDUNG SAHARI Bargowo Addianto Bariot Hafif Bariot Hafif Bariot Hafifa Basuki Sumawinata Bayu Sejati Boedi Tjahjono Budi Mulyanto Budi Nugroho Budi Nugroho Darmono Taniwiryono Darmono Taniwiryono Dedi Nursyamsi Dedi Nursyamsi Desi Nadalia Didy Sopandie Djoko Purnomo DWI ANDREAS SANTOSA Dwi Guntoro Edi Santosa Edwin Hidayat, Edwin Edy Djauhari Purwakusumah Eko Noviandi Ginting Endang Gunawan Endang Suhendang Enni Dwi Wahjunie Fahmi Arief Rahman Fahmuddin Agus Fakhrur Razie Fakhrur Razie Ganjar Priadi Gunawan Djajakirana Hadijah Siregar Handayani, Etik Puji Happy Widiastuti Happy Widiastuti Hartono, Arif Hendri Purnama Herison, Catur Hermanto Hermanto Heru B. Pulunggono Heru Bagus Pulunggono Husni Mubarok Husni Mubarok Husni Mubarok Husni Mubarok I Nyoman Sujana I Wayan Mangku I Wayan Rusastra Ibnul Qoyim, Ibnul Idris, Kamarudin Idris, Komaruddin Ilona Noyaa, Alce Indarti Puji Lestari Indriyati, Lilik Tri Irawati, Arfi Irdika Mansur Irsal Las Ishak Ishak Ishak Ishak Ishak Ishak Iswandi anas Iswandi Anas Iswandi Anas Iswandi Anas Iswandi Anas Iswandi Anas Ivanocih Agusta Ivanovich Agusta J. Sri Adiningsih K Kasmadi Kasmadi Kasmadi Kasmadi Kasmadi Khursatul Munibah Komarsa Gandasasmita Komarsa Gandasasmita Komaruddin Idris Komarudin Idris KOMARUDIN IDRIS Kukuh Murtilaksono Kusuma Handayani L. K. Darusman Latifah K. Darusman Latifah Kosim Darusman LATIFAH KOSIM DARUSMAN Lina Lathifah Nurazizah Lina Lathifah Nurazizah Luh Putu Ratna Sundari Lukman Gunarto Luthfi Izhar M. ALWI Machfud Machfud Manuwoto - MARIA BINTANG Maryadi Maryadi Maryadi Maryadi Maswar Maswar Maswar Maswar Maya Melati Meine van Noordwijk Meine Van Noordwijk Meine Van Noordwijk Miftahudin . Mimien Harianti Moh Zulfajrin Moh Zulfajrin Moh Zulfajrin Moh Zulfajrin Mohamad Rafi Muchammad Sri Saeni Muhadiono Muhadiono, Muhadiono Muhammad Amir Solihin Muhammad Amir Solihin Muhammad Ardiansyah muhammad Firdaus Muhammad Thamrin Muhammad Zulfikar Muliana Mulyawan, Ronny Munif Ghulamahdi Muya Avicienna Nabila Hanifah Natalia, Rina Nelvia Nelvia nFN Thamrin NISA RACHMANIA MUBARIK Nizam Tambusai Nizam Tambusai Novia Mustikasari Nurliani Bermawie Ohiwal, Morgan Oteng Haridjaja Paulus B.K. Santoso Priyo Cahyono Priyo Cahyono, Priyo R. Purnamayani Rachim, Djunaedi Abdul RACHMI WIDIRIANI RAHAYU WIDYASTUTI RASTI SARASWATI Retno Wijayanti Rika Andriati Sukma Dewi Rina Natalia Rury Kurniawan Ruslan - Rykson Situmorang S Susanto S. Anwar S. HADI SUTJAHJO Saeful Anwar Saeni, Muchammad Sri Safira Sukma Hanjani Sandra Arifin Aziz Santun R. P. Sitorus Santun R.P Sitorus Santun R.P. Sitorus Santun Risma Pandapotan Sitorus Santun Risma Pandepotan Sitorus Septiyana, . SETIARI MARWANTO Siska Nofita Siswanto Siswanto Siswanto Sisworo, Widjang Herry Siti Maryam Harahap Siti Maryam Harahap Siti Nurzakiah Siti Nurzakiah Siti Nurzakiah Sri Djuniwati Sri Djuniwati Sri Juniwati Sri Nico Djuniwati Sri Widodo Agung Suedy Sri Wilarso Budi Sudarsono Sudarsono . Sugiyanta Sukarman Sukarman Sumardjo Supiandi Sabiham Suprihati Suria Darma Tarigan Surjono H. Sutjahjo Susanto, Bambang Sutjahjo, Surjono H. Suwondo Suwondo Suyamto Suyamto Suyamto Suyamto Suyamto Suyamto Syaiful Anwar Syaiful Anwar Syamsul Arifin Syva Fitriana Taopik Ridwan TATI NURHAYATI Taufiq Bachtiar Taufiq Bachtiar Thamrin, nFN Toyip Toyip Untung Sudadi W. Hartatik Widiatmaka Yadi Setiadi