Abstract
Saturated soil culture (SSC) technology appropriate to prevent pyrite oxidation on tidal swamps and has been proved to increase the productivity of soybean on non-tidal swamp. The objective of the research was to determine the growth 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 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. No-watering was arranged out of the design as a comparison. The result showed that 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. However, technically and economically, 20 cm USS was the most appropriate water depth for soybean production at tidal swamps.
Highlights
PENDAHULUAN Salah satu upaya pengembangan lahan pertanian adalah melalui pemanfaatan lahan potensial
Saturated Soil Culture Expanding the Adaptation of Soybeans
Soybean in Tropical and Subtropical Cropping Systems
Summary
Lokasi penelitian berjarak 42 km dari Selat Bangka dengan ketinggian [1,2] m dari permukaan laut. Saat volume air sungai relatif tetap atau berkurang di musim kemarau, pengaruh air asin/salin dapat merambat sepanjang sungai sampai jauh ke pedalaman. Pengaruh air asin/salin di sungai dapat mencapai lokasi penelitian pada bulan-bulan terkering yaitu bulan Agustus-Oktober. Lahan pasang surut lokasi penelitian termasuk dalam zona II, yaitu pasang surut air tawar, menurut klasifikasi Widjaja-Adhi et al (1992) dan Subagyo (1997). Curah hujan tertinggi mencapai 560.8 mm dan terjadi pada bulan Maret 2009, kemudian curah hujan menurun hingga bulan Agustus 2009 yang hanya mencapai 39.6 mm. Suhu udara di lokasi penelitian adalah 27.734.4oC. Kesuburan tanah relatif baik dengan kandungan bahan organik, P2O5 dan K2O yang tinggi, namun sangat masam.
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