Subiksa, IGM
Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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PENGARUH FORMULA PEMBENAH TANAH ORGANIK GRANUL TERHADAP SIFAT KIMIA TANAH DAN PERTUMBUHAN TANAMAN PADA LAHAN KERING MASAM Subiksa, Igm
Jurnal Agroecotania : Publikasi Nasional Ilmu Budidaya Pertanian Vol 1 No 2 (2018): Jurnal Agroecotania: Publikasi Nasional Ilmu Budidaya Pertanian
Publisher : Jambi University, Fakultas Pertanian, Program Studi Agroekoteknologi

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Abstract

Lahan kering masam perlu dikelola secara intensif untuk mengatasi kendala inheren sifat fisik dan kimia tanahnya. Penelitian pengaruh formula pembenah tanah organik granul terhadap sifat kimia tanah dan pertumbuhan tanaman pada tanah kering masam telah dilakukan di rumah kaca Balai Penelitian Tanah. Penelitian bertujuan untuk mengevaluasi efektivitas formula pembenah tanah organik granul yang telah diperkaya senyawa humat sebagai pengganti kapur untuk memperbaiki sifat kimia tanah dan pertumbuhan tanaman. Penelitian dilakukan dengan percobaan pot menggunakan rancangan acak kelompok dengan 10 perlakuan dan 3 ulangan. Perlakuannya adalah 3 jenis pembenah tanah yaitu kapur, formula pukan ayam plus dan formula pukan sapi plus, masing-masing dengan 3 level dosis. Tanaman kacang hijau digunakan sebagai indikator yang ditanam dalam pot masing-masing dengan 3 tanaman. Hasil penelitian menunjukkan bahwa pembenah tanah kapur pertanian dengan cepat meningkatkan pH tanah dan menurunkan Al- dd. Sedangkan formula pembenah tanah pukan ayam plus lebih unggul dalam peningkatan karbon organik tanah. Pembanah organik pukan ayam plus juga dapat meningkatkan pH tanah dan menurunkan kadar Al-dd, namun intensitasnya lebih rendah dari kapur. Formula pembenah tanah pukan sapi plus, kurang berpengaruh terhadap peningkatan pH dan menetralisir Al-dd. Pembenah tanah pukan ayam plus dapat meningkatkan pertumbuhan dan produksi tanaman kacang hijau. Produksi biomas kacang hijau meningkat 60% dan produksi biji meningkat 56% dibandingkan dengan perlakuan kontrol. Pertumbuhan dan produksi kacang hijau dari perlakuan pukan ayam plus lebih baik dibandingkan dengan perlakuan kapur. Dapat disimpulkan bahwa pembenah tanah pukan ayam plus dan pukan sapi plus dapat dipakai sebagai pembenah tanah pengganti kapur pada lahan kering masam.
Perbandingan Pengaruh Beberapa Jenis Pupuk Mengandung Fosfat terhadap Kehilangan Hara Melalui Pelindian pada Tanah Gambut Subiksa, IGM
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol 7, No 1 (2018): JLSO
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Abstract

Subiksa et al, 2018. Comparison Effect of Several Phosphate Contain Fertilizers to Nutrient Loss Trough Leaching on Peat Soil . JLSO 7(1):1-13. Peat soil have specific nutrient adsorption characteristics which are affected by soil pH dependent charge. Therefore, nutrient management on such soil should be done using different approach compared to mineral soil. Research on the comparison effects of several types of phosphate containing fertilizers to nutrient loss through leaching on peat soil has been carried out in greenhouse using coulom experiments. The objectives of this study was to evaluate the rate of primary macro nutrient loss and look for fertilization technology which can reduced leaching rate. The study used a randomized block design of 14 treatments with 3 replications. The treatments were complete control treatment, partial control and 4 types of P contain fertilizer, namely SP-36, NPK compound, Chrismast Island Phosphate Rock (CIRP), and Pugam each of them with 3 levels dose. The peat soil used was ombrogenous peat with hemic maturity level taken from OKI Regency, South Sumatra. Watering is done every 2 days with 350 ml ion-free water/pot. The results showed that N and K nutrients leaching, mostly due to aplication rate of those nutrient, whereas type of fertilizer was not revealed significantly different. Meanwhile, P concentration in leachate water was significantly different among treatments. Leaching of P in the control treatment was very low because of P content of peat soil was low. The highest loss of P trough leaching rate is shown by the NPK treatment because NPK compound is belong to fast nutrient release fertilizer. CIRP and Pugam treatments showed low P loss trough leaching rates due to the slow release of P on CIRP and Pugam. The low leaching rates of CIRP and Pugam are also because of high content of Al and Fe as polyvalent cation that can promote new soil positive charges as site adsorption of P. It can be concluded that fertilization with a slow release type of phosphate fertilizer and contain sesquioxide as source of polyvalent cations such as CIRP and Pugam can reduced the rate of phosphate loss trough leaching.