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Effect of oIntermittent Drainage and Fertilization on pH, Eh, Fe, and Mn at New Paddy Soil in Ultisols of Bandar Abung (Lampung) and Tapin (South Kalimantan) Dedi Nursyamsi; Mangku E Suryadi
Jurnal Ilmu Tanah dan Lingkungan Vol 3 No 2 (2000): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

To study the effect of intermittent drainage and fertilization on new paddy soil of pH, Eh, Fe,and Mn, laboratory experiment was conducted using Ultisol of Bandar Abung, Larnpung and Tapin,South Kalimantan. Experiment was carried out using Completely Randomized Block Design with 5treatments and 3 replications. The treatments consist of control, organic matter (rice straw) 5,000kg/ha, KzSOI 100 kgha, dolomite SO0 k p a and intermittent drainage. In the drainage treatment thesoil was drained on the 3d, 5th, 7th, 12 , 14'~a~nd 1 6 w~e ek for 7 days respectively. The resultsshowed that intermittent drainage did not affed soil pH, increased soil Eh, decreased soil and water Fe II, and concentration of Mn II in flooded water in both Ultisols of Bandar Abung and Tapin. Organic matter did not affed soil pH, decreased soil Eh, increased soil and water Fe II and concentrattion of Mn II in flooded water in both UAisols of Bandar Abung and Tapin. The higher the soil Fe dithionit andDTPA in the soils caused higher risk in Fe toxicity.

EVALUASI KUALITAS PUPUK ORGANIK YANG BEREDAR DI PULAU JAWA BERDASARKAN PERMENTAN NO. 70/SR.140/10 TAHUN 2011 Triyani Dewi; Iswandi Anas; Suwarno Suwarno; Dedi Nursyamsi
Jurnal Ilmu Tanah dan Lingkungan Vol 14 No 2 (2012): Jurnal Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Banyak pupuk organik yang beredar di pasaran terutama di Pulau Jawa dengan mutu yang jelas. Berbagai kalangan, baik dari pihak konsumen/pengguna maupun pihak produsen/pembuat. Guna menjamin mutu produk dari suatu produsen pupuk organik yang akan dipasarkan, mendorong pemerintah untuk membuat peraturan yang berkaitan dengan semua aspek tentang pupuk organik. Pemerintah telah menetapkan suatu Peraturan Menteri Pertanian No.28/Permentan/SR.130/5/2009 yang kemudian diperbaharui dengan Peraturan Menteri Pertanian No.70/Permentan/SR.140/10/2011. Meskipun secara legal standar mutu pupuk organik telah dibuat, akan tetapi pada kenyataannya sangat sulit menentukan standar mutu pupuk organik dan di lapangan masih banyak ditemukan kualitas pupuk organik yang masih belum sesuai dengan persyaratan yang telah ditetapkan. Untuk meneliti kualitas pupuk organik yang beredar produksi dan dijual dipasar di Pulau Jawa, serangkaian studi telah dilakukan survei melalui pengambilan contoh pupuk organik di Jawa Barat, Jawa Tengah, dan Jawa Timur baik di tingkat petani, kios/agen, maupun produsen. Contoh-contoh pupuk organik tersebut dianalisis kadar air, pH, serta kandungan haranya yang meliputi kadar C-organik, N-total, rasio C/N, P2O5, K2O, Fe-total, Fe-tersedia, kadar logam berat Pb dan Cd di Laboratorium Terpadu Balai Penelitian Lingkungan Pertanian. Dari hasil survei, ternyata tidak ada satupun dari 60 contoh pupuk organik yang diuji yang memenuhi semua persyaratan pupuk organik menurut Permentan No. 70 Tahun 2011.

Effect of Biochar on Peat Soil Fertility and NPK Uptake by Corn Eni Maftu'ah; Dedi Nursyamsi
AGRIVITA, Journal of Agricultural Science Vol 41, No 1 (2019)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v41i1.854

This study aimed to investigate the biochar effect on peat soil fertility and uptake of nitrogen, phosphor, and potassium by corn plants. The experiment was conducted at a greenhouse in the Indonesian Swampland Agriculture Research Institute (ISARI), Banjarbaru, South Kalimantan, from June to September 2014. The peat soil sample was collected from the village of Kalampangan, Palangkaraya, Central Kalimantan. The treatment consisted of four types of biochar, namely coconut shell, palm midrib, Galam stem (Melaleuca leucadendron), rice husk and five rates of biochar i.e. 0, 2, 4, 8 and 16 t ha-1. Biochar was analyzed in total C, P, K, Ca, Mg, Fe, Si, ash content, pH and CEC, also initial soil sample was analyzed pH, EC, organic C, total N, P, available P, exchangeable K, Ca, Mg, H, Cu, Zn, and total acidity were measured. The application of biochar changed peat soil properties including pH, available P, exchangeable K, nutrient uptake and the dry weight (i.e root and shoot). The type of biochar significantly affect the exchangeable K in peat soil and nutrient uptake. The highest exchangeable K and NPK uptake by corn showed by the coconut shell biochar at dose 4 t/ha.

The Effect of Soil Tillage, Intermittent Irrigation, and Fertilization on Productivity of Newly Open Rice Fields on Inceptisols and Ultisols from Muarabeliti and Tatakarya DEDI NURSYAMSI; L.R WIDYOWATI; DIAH SETYORINI; J. SRI ADININGSIH
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 18 (2000): Desember 2000
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n18.2000.%p

Field experiment was conducted to study the effects of soil tillage, intermittent drainage, and fertilization on productivity of newly open rice fields of Inceptisols in Muarabeliti, South Sumatra and Ultisols in Tatakarya, Lampung. The experiment was carried out using split plot design with 3 replications. Two varieties of rice IR-42 and Ciliwung were used as plant indicators in Muarabeliti and Tatakarya, respectively. The main plots consist of combination of soil tillage and irrigation treatments: (1) no soil tillage/flooded continuously, (2) soil tillage/flooded continuously, (3) no soil tillage/intermittent drainage, and (4) soil tillage/intermittent drainage. The treatments on sub plot were : (1) no fertilization, (2) application of organic matter (rice straw) of 5,000 kg/ha, (3) application of K fertilizer (KCI) of 150 kg/ha, and (4) application of K fertilizer (KCI) of 150 kg/ha and dolomite of 50 kg/ha. The results showed that there were no significant effets of soil tillage treatment on soil chemical characteristics, nutrients uptake, plant growth, and dry straw and grain yield. However, in Ultisols of Tatakarya, dry straw and grain yields were better with soil tillage than no soil tillage treatment. Intermittent drainage treatment decreased soil exchangeable Ca and K in Inceptisols of Muarabeliti under soil tillage condition. While in Ultisols of Tatakarya, the treatment decreased soils exchangeable Ca, K and also Mg and base saturation under with and without no soil tillage treatments. The use of 5,000 kg/ha rice straw increased soil organic-C, exchangeable K, K-HCI, and cation exchange capacity; plant K uptake; and dry straw and grain yield in both soils. Application of K fertilizer of 150 kg/ha and its combination with dolomite of 50 kg/ha, each increased soil K-HCI, exchangeable K, and dry grain yield in Inceptisols of Muarabeliti. While in Ultisols of Tatakarya each treatment increased the above parameters and dry straw yield .

Dominant Soil Characteristics that Effect on Available K at Smectitic Soils DEDI NURSYAMSI; K. IDRIS; SUPIYANDI SABIHAM; AGUS SOFYAN
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

Research aimed to study dominant soil characteristics that effect on available K of smectitic soils were conducted in Laboratory of Research and Soil Test, Indonesian Soil Research Institute. The soil characteristics that has been analised were soil texture (pipette), organic-C (Kjeldahl), and CEC (NH4OAc); mineralogical analyses of clay fraction (X-Ray Diffraction); K fractionation: soil soluble-K (0.0002 M CaCl2), exchangeable-K (NH4OAc), and total-K (HNO3+HClO4); and potassium sorption. The results showed that the content of soil soluble, exchangeable, non-exchangeable, and total-K was in order of Vertisols > Alfisols > Inceptisols. The percentage of soil K fraction of the soils, however, was in order of soluble-K < exchangeable-K < non-exchangeable-K. Although the soils had high content in total K but most of them were in nonexchangeable form, thus they were not available for plant growth. Soil K buffering capacity and maximum sorption were in order of Vertisols > Alfisols > Inceptisols. The bond energy constant of Vertisols, however, was similar with that of Alfisols but it was about twice with that of Inceptisols. Soil clay, organic-C, and CEC affected the availability of soil K significantly (P > 0.95). Smectite contributed significantly (P > 0.95) to soil negative charge so that it held an important role in controlling soil K buffering capacity and maximum sorption. To increase the efficiency of K fertilizer, plant species that can produce organic acid exudated from roots in high quantity can be developed in smectitic soils. The use of Na, NH4, and Fe cations need also to be considered for K management in the soils as well.

P Extraction Method and Fertilizer Requirement of Soybean on Typic Kandiudox in Papanrejo, Lampung DEDI NURSYAMSI; M.T SUTRIADI; UNDANG KURNIA
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 22 (2004): Desember 2004
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n22.2004.%p

Field experiment to select extraction method, determine nutrient availability class, and estimate P fertilizer recommendation for soybean on Typic Kandiudox was conducted in Papanrejo, Lampung. The experiment applied single location approach with two steps of activities. The first step conducted in dry season 2002 was to make artificial soil P status by adding P: 0X (very low), 1/4X (low), 1/2X (medium), 3/4X (high), and X (very high status), where X was amount of P required to attain 0,2 μg P l-1 in soil solution. The second step, conducted in the following season (wet season 2002/2003), was P treatment in each artificial soil P status by using P fertilizer: 0, 20, 40, 80, and 160 kg P ha-1 from SP-36 with 3 replicates. The result showed that Mehlich, Olsen, Truogh, Bray 1, and Bray 2 could be used to estimate P fertilizer requirement for soybean on Typic Kandiudox. Among the extractions, Bray 1 was the best. The levels of soil P availability extracted using Bray 1 were classified into: low (<8 ppm P205), medium (8–20 ppm P205), and high (>20 ppm P2O5), while soil P availability extracted using Bray 2 were <12, 12–36, and >36 ppm P2O5 for low, medium, and high classes, respectively. P fertilizer recommendation for soybean on Typic Kandiudox with low, medium, and high soil P availability classes was 58, 45, and 16 kg P ha-1 or equal to 355, 279, and 97 kg SP-36 ha-1, respectively.

Effect of Application of Rock Phosphate on Soil P Adsorption and Fractionation at Dystrudepts of Cibatok, Bogor Dedi NURSYAMSI; L. ANGGRIA; . NURJAYA
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 34 (2011): Desember 2011
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n34.2011.1-12

Phosphorous fertilization in both lowland and upland is an activity that must be done to increase agricultural production in Indonesia. Farmers typically use an acidulated rock phosphate, such as: TSP, SP-36, or SP-18 where its effectiveness varies depending on the type of soil and cultivated crops. Rock phosphate fertilizers have a high prospect to be used directly inacid upland soils because of its effectiveness equals the acidulated rock phosphate but the price is cheaper. Laboratory experiments aimed at studying the effect of the rock phosphate application on soil P adsorption and fractionation as well as determining the critical level of soil P for maize P-12 variety growth have been carried out using soil samples taken from rock phosphate fertilization experiment in the field, at volcanic Dystrudepts soil in Cibatok, Bogor. Analysis for soil P adsorption Fox and Kamprath (1970) methods were used, while its fractionation used modified Sekiya (1983) methods. The results showed that the use of rock phosphate increased soil soluble P therefore its availability for plant growth increased too. Beside that, it increased all soil P forms as well as soil HCl-P and Bray I-P significantly. P forms in tested soil from high to low were the residual-P > organic-P > Fe-P > Al-P > Ca-P in which the form of residual-P, Fe-P, and total-P played an important role in controlling the availability of soil P. Critical level of soil Fe-P, residual-P, and total-P for maize P-12 variety growth in the soil were 320, 510, and 1,250 mg P2O5 kg-1 respectively.

Soil P Availability in Neutral and Alkaline Soils DEDI NURSYAMSI; D. SETYORINI
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 30 (2009): Desember 2009
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n30.2009.%p

The availability of soil P for plant growth depends on equilibrium reaction between several P forms in the soils, such as soil soluble, labile, non-labile, as well as organic P. The research that aimed to study soil P availability, form, and sorption, as well as soil properties that affect on P availability in neutral and alkaline soils was conducted in Soil Testing Laboratory, Indonesian Soil Research Institute using 91 topsoil samples (0-20 cm) which have pH neutral-alkaline taken from Java. The samplesconsisted of Inceptisols (13 samples), Vertisols (47 samples), and Alfisols (31 samples). Soil properties analyzed were soil pH H2O (1:5), clay content (pipette), organic-C (Kjeldahl), exch. Ca and Mg (NH4OAc 1 N pH=7), exch. Al (KCl 1 N), and P (HCl 25%, Olsen, and Bray I). Soil P fractionation and sorption were determined using Kuo (1996) and Fox and Kamprath (1970) procedures respectively. The result showed that according to HCl 25%, Olsen, and Bray I extractions, the availability of soil P among the soils was in order of Inceptisols > Vertisols > Alfisols. Whereas the soil P forms in tested soils was in order of residual-P > Ca-P > (Fe+Al)-P > organic-P. Buffering capacity, maximum sorption, as well as bonding energy constant of soil P was in order of Inceptisols > Vertisols > Alfisols. Furthermore, soil properties that effected significantly on the variables of soil P availability were soil clay content, organic-C, and exch. Mg in Inceptisols; clay content and organic-C in Vertisols; as well aspH, clay content, and exch. Ca in Alfisols.

Maize (Zea mays, L.) response on Fertilization of Russian MOP in Inceptisols and Ultisols DEDI NURSYAMSI; . HUSNAIN; ANTONIUS KASNO; DIAH SETYORINI
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 23 (2005): Desember 2005
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n23.2005.%p

Indonesia’s agricultural lands commonly require fertilization of K to attain optimum plant yield. So far, most farmers use K fertilizer from KCl, apart to the fact that its effectiveness varies with soils and plants. It is expected that Russian MOP fertilizer is more effective and economically morebeneficial than KCl fertilizer. Field experiment aimed to test the effectiveness of Russian MOP for maize and was conducted in Inceptisols (of Cibatok-Bogor) and Ultisols (of Jagang-North Lampung) in dry season of 2004. The experiment applied Randomized Completely Block Design with 3 replicates, and maize of Lamuru variety was as plant indicator. The treatment consisted of 5 levels of Russian MOP fertilizer: 0, 25, 50, 100,and 200 kg ha-1 and one treatment of KCl fertilizer of 100 kg ha-1 as a reference. The result showed that the use of Russian MOP increased soil HCl-K and NH4OAc-K as well as dry matter and grain yield. RAE at Russian MOP level of > 100 kg ha-1 was 138 and 115 in Inceptisols of Cibatok and 314 in Ultisols of Jagang. The maximum profits using Russian MOP fertilizer in Inceptisols and Ultisols were Rp 4.4 and Rp 1.9 million ha-1 season-1, respectively, and were greater than those of using KCl fertilizer in both studied soils. IBCR values of the Russian MOP fertilizer were 2.44-10.37 (Inceptisols) and 0.69-3.41 (Ultisols) and were greater than those of KCl fertilizer. The requirements of Russian MOP fertilizer to achieve maximum profit were 119 and 105 kg ha-1 or equal to 71 and 63 kg K2O ha-1 for Inceptisols of Cibatok and Ultisols of Jagang, respectively. Considering its effectiveness and benefit, Russian MOP fertilizer can be used as alternative of K fertilization.

Keragaan Varietas Inpara di Lahan Rawa Pasang Surut (Performance of Varieties Inpara in Swampland) Koesrini Koesrini; Muhammad Saleh; Dedi Nursyamsi
JURNAL PANGAN Vol. 22 No. 3 (2013): PANGAN
Publisher : Perum BULOG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33964/jp.v22i3.95

Lahan rawa pasang surut merupakan lahan marjinal tetapi memiliki potensi cukup besar untuk usahatani padi apabila dikelola dengan menerapkan teknik budidaya yang tepat. Kunci utama keberhasilan usahatani padi di lahan rawa pasang surut adalah pengelolaan air yang tepat dan pemberian hara yang seimbang pada varietas padi yang adaptif. Inpara (Inbrida padi rawa) merupakan varietas yang daya adaptasinya di lahan rawa beragam. Tujuan penelitian ini adalah untuk mengevaluasi keragaan varietas Inpara di lahan rawa pasang surut. Kegiatan dilaksanakan di Kebun Percobaan Belandean, Kabupaten Barito Kuala, Propinsi Kalimantan Selatan pada musim kemarau 2012. Tanah di lokasi pengujian tergolong tipologi lahan pasang surut sulfat masam potensial dengan tipe luapan air B. Percobaan menggunakan rancangan acak kelompok, 6 perlakuan dan 5 ulangan. Ada enam varietas padi rawa yang ditanam, yaitu Inbrida Padi Rawa (Inpara) 1, 2, 3, 4, 5 dan Margasari. Pengujian ini menunjukkan bahwa potensi lahan sulfat masam potensial dapat ditingkatkan dengan menanam varietas unggul Inpara 1, 2, 3, 4 yang produktivitasnya lebih tinggi dari varietas Margasari. Varietas Inpara 5 lebih sesuai ditanam di lahan rawa lebak. Kenaikan hasil Inpara 1, 2, 3, 4 dibandingkan varietas Margasari berturut-turut adalah 0,99, 1,39, 098, 0,98 ton GKG/ha. Kenaikan hasil varietas Inpara nyata sampai sangat nyata secara statistik.Swampy lands or wetlands are marginal lands but they have considerable potentials for rice farming. The main key solution to overcome swampy lands constraints are nutrient and water management as well as the use of adaptive rice varieties. Inparas (inbred swampy land rice) is variety released by the Indonesian Agency for Agricultural Research and Development (IAARD) which is adaptive to swampy land conditions. The purpose of this research was to evaluate the performances of Inpara varieties in tidal wetlands. The field experiment was carried out in Belandean Experiment Station, Barito Kuala District, South Kalimantan Province in the dry season of 2012. Soil of the site is classified as potential acid sulfate soil with type B overflow. The research was arranged in Randomized Completely Design, with 6 treatments and 5 replications. There were planted six swampy land varieties, i.e. Inpara 1, 2, 3, 4, 5 and Margasari. The result showed that potential acid sulfate soil could be increased by planting Inpara 1, 2, 3, and 4 which had higher yield than that of Margasari variety. Inpara 5 variety was more suitable to be planted on fresh water wetlands. The increasing yield of Inpara 1, 2, 3, and 4 compared to that of Margasari variety were 0.99, 1.39, 0.98, 0.98 ton/ha, respectively. The increasing yield of Inpara varieties was significantly different.

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