Pengaruh Cara Pengomposan dan Dosis Kompos Jerami terhadap Pertumbuhan dan Produksi Kedelai (Glycine max L. Merr) pada Budidaya Jenuh Air di Lahan Pasang Surut

Abstract

Saturated soil culture (SSC) is a cultivation technology that gives continous irrigation and maintains water depth and makes soil layer in saturated condition. By keeping the water-table constantly, soybean will be avoided from negative effect of inundation on soybean growth because soybean will acclimatize and improve its growth. By keeping the water-table constantly, soybean is avoided from negative effect of inundation on its growth because it will acclimatize and improve its growth. The objective of the research was to study the composting and dosage of compost rice straw to growth and production of soybean (Glycine max L. Merr) at saturated soil culture on tidak swamps. The research was conducted at Banyuurip of Tanjung Lago Sub District, Banyuasin District, South Sumatra Province, Indonesia from April to August 2010. The research was arranged in a randomized complete block design, two factorials. First factor was composting system, consisted of composting by effective microorganism and composting by manure, lime, and urea. Second factor was dosage of compost, consisted of without compost, 5, 10, and 15 ton compost/ha. Therefore there are 8 treatment combinations, each treatment combinations was repeated 3 times so there are 24 plots. Composting system was significantly different from height at 4 week after planting (WAP) and the number of leaf at 6 WAP. Dosage of compost was significantly different from height at 2 and 4 week after planting (WAP) and seed productivity. Productivity in composting by effective microorganism was higher but not significantly different from manure, lime and urea. Optimal dosage was 10 ton/ha. Productivity of 10 ton/ha compost was 2.62 ton/ha, not significantly different from 15 ton/ha compost (2.46 ton/ha) and significantly different from 0 ton/ha compost (2.16 ton/ha) and 15 ton/ha compost (2.17 ton/ha). Key words: Glycine max (L.) Merr., tidal swamps, compost.