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All Journal HAYATI Journal of Biosciences Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) CHEMISTRY PROGRESS Journal of Tropical Soils Jurnal Agro Teknologi Tropika Indonesian Journal of Agricultural Science Jurnal Sumberdaya Lahan Jurnal Sumberdaya Lahan Jurnal Tanah dan Iklim

Iswandi Anas

Departemen Ilmu Tanah Dan Sumber Daya Lahan, Fakultas Pertanian, Institut Pertanian Bogor (IPB) Jl. Kamper, Kampus IPB Dramaga 16680 Indonesia.

Author-ID : 227036

Agriculture, Biological Sciences & Forestry Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Environmental Science

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Efisiensi Serapan Hara dan Hasil Padi pada Budidaya SRI di Persawahan Pasang Surut dengan Menggunakan Kompos Diperkaya Razie, Fakhrur; Anas, Iswandi; Sutandi, Atang; Sugiyanta, ,; Gunarto, Lukman
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

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

Pemanfaatan Mikrob Pelarut Fosfat untuk Mengurangi Dosis Pupuk P Anorganik pada Padi Sawah Puspitawati, Mutiara Dewi; ., Sugiyanta; Anas, Iswandi
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 41 No. 3 (2013): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

ABSTRAKMikrob pelarut fosfat (MPF), meliputi bakteri pelarut fosfat (BPF) dan fungi pelarut fosfat (FPF), berpotensi dalammeningkatkan ketersedian P dan meningkatkan efisiensi penyerapan P dari pupuk P anorganik. Tujuan penelitian adalahmengisolasi dan menyeleksi MPF, menguji efektivitas MPF dalam meningkatkan P tersedia dan mengurangi dosis pupuk Panorganik pada sistem budidaya pengelolaan tanaman terpadu (PTT) dan system of rice intensification (SRI). Percobaanlaboratorium meliputi isolasi dan seleksi MPF, uji indeks pelarutan P, uji pelarutan P dari sumber P sukar larut dan ujiantagonistik. Percobaan lapangan meliputi perlakuan dosis pupuk Panorganik yaitu 100%, 75%, 50%, dan kombinasi BPF,FPF, BPF+FPF. MPF diinokulasi menggunakan metode perendaman akar padi. Hasil percobaan laboratorium menunjukkanisolat bakteri BPFA5 (Pseudomonas aeruginosa) dan isolat fungi FPFE1 (Aspergillus niger) memiliki kemampuan pelarutanP lebih tinggi dan kompatibel dalam satu kultur. Hasil percobaan lapangan menunjukkan bahwa perlakuan sistem budidayaSRI lebih unggul dibandingkan PTT berdasarkan pertumbuhan, komponen hasil, hasil gabah, dan serapan hara P gabah.Perlakuan 75% dosis pupuk P anorganik+MPF (bakteri dan fungi) pada sistem budidaya SRI menghasilkan jumlah anakanproduktif, hasil gabah, dan serapan hara P gabah yang lebih tinggi dibandingkan perlakuan lainnya. Aplikasi mikrob pelarutP dapat mengurangi dosis pupuk P anorganik sampai 50% dan meningkatkan hasil gabah dan serapan hara P jerami dangabah.Kata kunci: bakteri pelarut fosfat, fungi pelarut fosfat, pengelolaan tanaman terpadu, system of rice intensification

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): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

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

Co-Authors A Noeralam Agung Dhamar Syakti Anak Agung Istri Sri Wiadnyani Andreas Panjaitan Ania Cintaresmini Arum Asiyanti Suhastyo, Arum Asiyanti Arzyana Sunkar Atang Sutandi Bariot Hafifa Batara, Lily Noviani Charlena D.A Santosa DWI ANDREAS SANTOSA Edi Santosa Erniwati Erniwati Ervizal AM. Zuhud Fakhrur Razie Gunawan Djajakirana Haryanti Haryanti Ishak, Ishak Kartika, Sari Yulia Kurnia Dewi Sasmita Lukman Gunarto Mas?ud, Zainal Alim Miftahudin . Moh. Yani Mutiara Dewi Puspitawati N Handayani Nelvia Nelvia Nurrobifahmi, Nurrobifahmi Nurul Hidayati Nurul Hidayati RAHAYU WIDYASTUTI Rury Kurniawan Sanjaya, Wilhelmus Terang Arga Setiadi, Yadi Sitanala Arsyad SUBOWO GITOSUWONDO Sugiyanta Sugiyanta . Sukmadewi, Desak Ketut Tristiana Suprihati Suyamto Suyamto Triadiati Triadiati Violita Violita Wiwik Eko Widayati Yadi Setiadi Yadi Setiadi YANTO SANTOSA YULIN LESTARI Zainal Alim Mas’ud

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