| dc.description.abstract | One of the efforts to support the succesfully of ex-coal mining reclamation is improving land quality and choosing oppropiate plants. The application of humic substance to replace organic matter function is still limited. Koro Benguk (Mucuna pruriens) is one of a land cover crops which usually used on ex-coal mining. This plant is tolerant on acid soil, fast growing, high biomass, decomposed easily, and has a function as conservation plant which can reduce erosion. This research was aimed to study the effect of amelioran humic substances, organic matter, and lime ameliorant application on the growing of Koro Benguk and soil physical-chemical properties in ex-coal mining PT. Arutmin Indonesia, Batulicin Mine, South Kalimantan. Research has been done experimentally using descriptive analysis. This research consist of 9 treatments as follows: humic substances with dosage 2.5 l/ha; 5 l/ha; 7.5 l/ha; liming with dosage 3.45 ton/ha (50% Al-dd ); 6.9 ton/ha (100% Al-dd); lime with dosage 3.45 ton/ha (50% Al-dd) + humic substances 5 l/ha; lime with dosage 6.9 ton/ha (lime 100% Al-dd) + humic substances 5 l/ha dosage; organic fertilizer 100 ton/ha and control. All this treatments were repeated three times. The parameters which were used in this research are fresh weight and dry weight pf Koro Benguk 3.5 month after planting. Soil analysis was conducted in laboratory of Physical Land Resources Development and laboratory of Soil Physics and Conservation, Bogor Agricultural University. The results showed that application of humic substances gave the significanly increase of Koro Benguk plant biomass substantially 48.53 kg fresh weight and 11.81 kg dry weight, but was not significantly different on physicschemical properties. Liming application gave an effect on pH increased from 4.21 to 5.40 and decreasing Al from 10.17 me/100g to 0.29 me/100g. Organic fertilizer increasing C-organic from 0.16% to 0.96% and Cation Exchange Capacity (CEC) from 7.67 me/100g to 10.27 me/100g. Organic matter treatment decrease bulk density from 1.46 g/cm3 to 1.19 g/cm3. | id |
