Effects of culture system and N leaf fertilization on growth and yield of soybean-rice intercropping
2004
Yustisia | Ghulamahdi, M. | Aziz, S.A.
In order to determine the effects of culture system and N leaf fertilization on growth and yield of soybean-rice intercropping, a field experiment was conducted at Babakan Sawah Baru Experimental Station, IPB, from April until August 2001. Split plot design with four replications was used. Culture system as mainplot namely saturated soil culture (SSC), saturated soil culture-dried culture (SSC-DC), dried culture-saturated soil culture (DC-SSC) and dried culture (DC). N leaf fertilizer levels as subplot were 0, 5, 10 and 20 g/l water of urea. The growth components, yield components and yield of soybean and rice on SSC, SSC-DC and DC-SSC were better than that of DC. The highest yield of soybean and rice were achieved by the DC-SSC and SSC respectively. The soybean and rice yielded by those culture were 1.56 and 2.61 t/ha. It gave 52.94 percent and 39.57 percent higher yield than DC. The rates 20 g/l water of urea increased the yield of soybean and yield of rice 19.67 percent and 22.11 percent respectively as compared to 0 g/l water of urea. The yield of intercropped soybean on SSC, SCC-DC, DC-SSC and DC decreased about 9.15 percent, 4.79 percent, 7.69 percent and 9.73 percent. While the yield of rice decreased about 44.94 percent, 37.11 percent, 43.16 percent and 5.08 percent respectively. The land equivalent ratio (LER) value were about 1.46-1.86. It mean that intercropped system gave more benefit than monocropped system. The DC-SSC resulted the highest benefit among the cultures system tested. It gave net benefit Rp 2,672,450. While the rates 20/gr water of urea gave net benefit Rp 2,657,400.
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