Physical characteristics changemen of Central Kalimantan peat as a result of fertilization by NPK, liming and paraquat application
2002
Sunarminto, B.H. | Martani, E. | Handayani, S. (Universitas Gadjah Mada, Yogyakarta (Indonesia). Fakultas Pertanian)
The tropical peatland area of Pangkoh Subdistrict of Kapuas Regency in Central Kalimantan is utilized especially for growing corn, besides rice, cassava, and groundnut. Fertilization, liming, and herbicide are commonly applied which can disturb the original characteristics of peatland as a medium of plant growth. A study of physical characteristic changes on saptic, hemic and fibric peat materials was accomplished with and without treatments of: fertilization (350 kg/ha urea, 150 kg/ha phosphate, 175 kg/ha KCl, liming (40 ton/ha lime), herbicide application (20 ppm of paraquat), with 3 replications. All pots were incubated for 80 days. The analysis of physical characteristics was carried out on peat samples before and after treatment. The results of this experiment can be used as a reference for sustainable utilization of tropical peatland. The results showed that characteristics of field capacity, apparent density and particle density were not influenced by the treatments; the total porosity of fibric peat was increased by a single treatment of fertilization, liming, and paraquat application; the total and disturbed fibre content of sapric peat were decreased by treatment of a single and combination of fertilization and or paraquat application; the organic matter content of sapric peat was reduced and, on the contrary, the ash content of sapric peat was increased by a single application of and combination of liming treatment
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