Comparative efficiency of Sesbania, Gliricidia, and urea as N sources in wetland rice.
1993
Kundu D.K. | Rao K.V. | Pillai K.G.
Urea was the most efficient of the N sources. Efficiency of Gliricidia N and Sesbania N was about 67% and 45%, respectively, that of urea N. Crop uptake from Gliricidia was significantly higher than from Sesbania at both PI and maturity. Rice yield using Gliricidia was 0.6 t/ha more than with Sesbania. Gliricidia released relatively more N to the soil than Sesbania through 8 WAT. While the rice crop was growing, mean available N content in the soil (0-15 cm plow layer) treated with Gliricidia was 16.6 kg/ha and 13.9 kg/ha with Sesbania. Availability of N to the rice crop from Gliricidia at early tillering stage (4 WAT) was significantly higher than that from Sesbania. Gliricidia seems to be more promising than Sesbania as a GM [green manure] source of N for wetland rice.
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