Pertumbuhan Dan Produksi Beberapa Varietas Kedelai Pada Berbagai Kedalaman Muka Air Di Lahan Rawa Pasang Surut
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Saturated soil culture (SSC) is a cultivation technology that provides continuous irrigation. It keeps water depth constantly and makes soil layer in saturated condition. 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. This technology appropriate to prevent pyrite oxidation on tidal swamps and has been proved to increase the productivity of soybean on nontidal swamp. The objective of the research was to determine the response of soybean varieties under saturated soil culture on tidal swamps. The research was conducted at Banyu Urip, Tanjung Lago, Banyuasin District, and South Sumatera Province, Indonesia from April to August 2009. The experiment was arranged in a split plot design with three replications. The main-plot of the experiment was water depth in the furrow consisted of without watering, 10, 20, 30, and 40 cm under soil surface (USS). The subplot of the experiments was soybean varieties consisted of Tanggamus, Slamet, Wilis, and Anjasmoro. The result showed that the interaction between varieties and water depth significantly affected growth and seed production, but not for pod numbers/plant. The values of all variables were higher under SSC compared to those cultivated without watering, but varieties responded to SSC differently. Nutrient absorption of N, K and Mn by Tanggamus was higher than those of other varieties, except K, however K absorption of Tanggamus was not significantly different from Anjasmoro. P and Fe absorption of Tangamus tended to be higher than the other varieties, although statistically they were not affected by variety. The highest seed production was obtained from Tanggamus with 40 cm USS, i.e. 4.83 ton/ha but it was not significantly different from those at water depth 20 (4.63 ton/ha) and 30 cm USS (4.71 ton/ha). However, technically and economically, 20 cm USS was the most appropriate water depth for soybean production at tidal swamps.
- MT - Agriculture