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AI DARIAH
Balai Penelitian Tanah Jalan Tentara Pelajar No 12A, Cimanggu, Bogor 16111
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Reclamation of Ex-Mining Land for Agricultural Extensification DARIAH, AI; ABDURACHMAN, A.; SUBARDJA, DJADJA
Jurnal Sumberdaya Lahan Vol 4, No 01 (2010): Juli 2010
Publisher : Indonesian Center for Agriculture Land Resource Development

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Abstract

Utilization of ex-mining land for agricultural extensification is an opportunity to solve the problem of food and environment. This paper discusses prospective utilization of ex-mining land for agricultural extensification. Mining area equipped with a business license for mining in Indonesia is around 2.2 million ha under Coal Concession Agreement, and 2.9 million ha under the Contract of Effort. A part of land is already finished being mined, and be managed properly in order to benefit the community and not damage the environment. The initial steps that need to be done is mapping of mined lands, included a status of ownership (land tenure), so that subsequent use of both for agriculture and other businesses can be sustainable. Land reclamation is necessary to increase capacity and efficiency for biomass production. Determination of land use types, should be based on land tenure, bio-physical conditions of land, and the needs of the community or local government. In the future, mining land management requirements is not enough simply by opening a feasibility study for mining operations, but need to be accompanied also with itsclosure plan (planning of closures), which includes environmental protection and mitigation of socio-economic problems. This needs to be one of the terms of the granting of mining permits.
PENGARUH TINGGI MUKA AIR SALURAN DRAINASE, PUPUK, DAN AMELIORAN TERHADAP EMISI CO 2 PADA PERKEBUNAN KELAPA SAWIT DI LAHAN GAMBUT DARIAH, AI; JUBAEDAH, JUBAEDAH; WAHYUNTO, WAHYUNTO; PITONO, JOKO
853-8212
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

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ABSTRAKDrainase yang berlebihan dan penggunaan pupuk yang intensifdiduga menjadi penyebab tingginya emisi gas rumah kaca (GRK) padaperkebunan kelapa sawit di lahan gambut. Penelitian ini bertujuan untukmempelajari pengaruh tinggi muka air (TMA) saluran drainase, pupuk,serta amelioran terhadap emisi CO 2  dari perkebunan kelapa sawit di lahangambut. Penelitian dilakukan dari bulan Januari 2010 sampai denganDesember 2011, pada perkebunan sawit di lahan gambut, di KecamatanSiak Kecil, Kabupaten Bengkalis, Riau, menggunakan rancangan petakterpisah, tiga ulangan. Petak utama adalah TMA saluran drainase (40, 60,dan 80 cm). Anak petak adalah pupuk dan amelioran: (1) dolomit 3kg/pohon/tahun; (2) Pugam 10 kg/pohon/tahun; (3) Pupuk dosisrekomendasi (2,5 kg urea+2,75 kg SP-36+2,25 kg KCl+dolomit 2kg)/pohon/tahun; (4) Pupuk 75% dosis rekomendasi pukan 20kg/pohon/tahun; (5) Pupuk 75% dosis rekomendasi Pugam 2,5 kg/pohon.Parameter yang diamati adalah fluks CO 2 . Hasil penelitian menunjukkanbahwa pada TMA drainase 80 cm, perlakuan dolomit menghasilkan fluksCO 2 nyata paling tinggi (142,1 t/ha/tahun) dan terendah (44,5 t/ha/tahun)dicapai perlakuan pugam. Fluks CO 2 yang tinggi (130,6 t/ha/tahun) jugadicapai perlakuan pupuk dosis rekomendasi, khususnya pada TMA 40 cm.Pada musim kemarau TMA drainase berpengaruh nyata terhadap fluksCO 2 , terendah dicapai TMA 40 cm. Oleh karena itu, untuk meminimalkanemisi gas CO 2 , maka TMA drainase perlu dipertahankan sedangkalmungkin (sekitar 40 cm) selama tidak menurunkan produksi kelapa sawit.Amelioran dengan bahan aktif kation polyvalen berpotensi dapat menekanemisi GRK dari lahan gambut yang dikelola secara intensif.Kata kunci: amelioran, emisi, drainase, gambut, kelapa sawit, pupukABSTRACTExcessive drainage and intensive use of fertilizers thought to bethe cause of high greenhouse gas emissions in peatland under oil palmplantations. The study aimed at measuring the influence of water leveldrainage (WLD), fertilizer, and ameliorant on CO 2 emissions from oilpalm plantations on peatland. The study was conducted from January2010 to December 2011, at oil palm plantation on peatland, located in SiakKecil District, Bengkalis Regency, Riau, using split plot design, with threereplications. The main plot were WLD (40, 60, and 80 cm), as sub plotswere fertilizer and amelioran: (1) dolomite 3 kg/tree/year; (2) peatfertilizer 10 kg/tree/year; (3) dose of fertilizer recommendations (2,5 kgurea+2,75 kg SP-36+2,25 kg KCl+dolomite 2 kg)/tree/year; (4) 75% doseof fertilizer recommendations + manure 20 kg/tree/year; (5) 75% dose offertilizer recommendations + peat fertilizer 2.5 kg/tree/year. Parameterobserved was CO 2 flux. The result showed that at WLD 80 cm, dolomitetreatment resulted the highest (142,1 t/ha/year) and the lowest CO 2  flux(44,5 t/ha/year) resulted by peat fertilizer. The highest CO 2 flux alsoreached by fertilizer recommendations treatment, particularly on WLD 40cm. In dry season WLD significantly effect on CO 2 flux. The lowestreached by WLD 40 cm. Based on that the WLD needs to be maintainedin a state of shallow (approximately 40 cm), without lowering production.The use of fertilizer containing ameliorant with the polyvalen cation asactive material, potentially suppress the rate of greenhouse gas emissionsfrom peatlands are managed intensively.Key words: ameliorant, emission, drainage, peatland, oil palm, , fertilizer
THE USE OF MINERAL AND ORGANIC SOIL CONDITIONER TO IMPROVE SOIL QUALITY OF TYPIC KANHAPLUDULTS TAMANBOGO, LAMPUNG DARIAH, AI; SUTONO, .; NURIDA, NENENG LAILA
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

As soil conditioner, there are many functions of organic matter that would not be replaced by mineral material. Therefore, mineral soil conditioner is better focused on increasing quality of organic soil conditioner. The objective of the research was to obtain the effectiveness of soil conditioner formula (organic matter and zeolit) and its application technique (dose and phase application) in improving soil quality. The research was conducted at KP Tamanbogo, Lampung for three seasons (2006/2007). The experiment employed a split plot design with three reflications. Application techniques of soil conditioner (dose and phase aplication) as main plots and three types formula of soil conditioner as sub plots. Corn was used as test crop. Parameters observed were plant growth and production, and changes in soil properties. The results showed that soil conditioner that applied on Typic kanhapludults could significantly increased corn growth and yield. Soil conditioner with higher organic matter proportion has better effect on corn growth and yield as well as on physical soil properties, which indicated by soil permeability and aggregate stability. The addition of 20% of zeolit in soil conditioner formula increased soil microorganism activities, but the additional up to 30% decrease microorganism activities. The changes of organic matter and zeolit proportion in soil conditioner has significantly effect on soil pH and N content, but has no significantly effect on P, K content, and CEC. Compared to innitial soil condition, application of soil conditioner could increase CEC from <4 cmolc kg-1 to 5.85 cmolc kg-1 respectively. Soil conditioner was better to be applied periodically but must be done every season. For degraded soil such as at KP. Tamanbogo, soil conditioner was applied with 10 t ha-1 dose for innitial rehabilitation process, hereinafter with 5 t ha-1 annual crop season dose.
RELATIONSHIP BETWEEN SOIL CHARACTERISTICS AND RATE OF SOIL LOSS ON COFFEE BASE-FARMING SYSTEM AT SUMBERJAYA, WEST LAMPUNG DARIAH, AI; AGUS, F.; ARSYAD, S.; SUDARSONO, .; MASWAR, .
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 21 (2003): Desember 2003
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n21.2003.%p

Abstract

The current public perception concerning land use change is, whenever forest is converted to agricultural land, the forest functions would drasticaly decrease. Studies have shown that soil loss in coffee based systems varied widely and it could be much lower than the tolerable soil loss level, depending on soil properties. This research was conducted to determine the dominant factors of soil properties in influencing soil loss. This analysis was based on data collected from a 3-site (Laksana, Tepus and Bodong Sub-Village of Sumberjaya Village, West Lampung) erosion study in 2001/2002. Observation of soil properties for each site was carried out by soil profile description and quantitative laboratory analyses for several soil physical properties and organic C content. Samples were collected from three soil depths namely 0-10, 10-20 and 20-40 cm. The resultsindicated that soil physical properties were dominant factors determining soil loss level in coffee-based farming system in Sumberjaya. The erosion on soil with mean total porosity of > 65%, macro pore of > 24%, and soil permeability of > 9 cm hr-1 was < 2 t ha-1 yr-1. Whereas erosion of soil with porosity of < 60%, macro pore of < 13%, and soil permeability of < 3 cm hr-1 was 37 t ha-1 for 3 months. These results suggested that soilconservation recommendation, particularly for Sumberjaya coffeebasedsystems, should not be imposed uniformly across sites. Site-specific soil property characterization and hence evaluation of soil susceptibility to erosion should precede recommendation and implementation emphasized only on erosion-prone sites.
Co-Authors . MASWAR . SUTONO A. ABDURACHMAN DJADJA SUBARDJA F. AGUS I Dewa Gde Mayun Permana Joko Pitono JUBAEDAH JUBAEDAH, JUBAEDAH NENENG LAILA NURIDA S. Arsyad Wahyunto Wahyunto