Use of Leucaena leucocephala for increasing rice yield
1989
Chayong Nammuang (Department of Agriculture, Bangkok (Thailand). Soil Science Div.) | Gerald Rathert | Swang Rojanakuson
Potential for alley cropping rice with giant leucaena (Leucaena leucocephala cv. Peru) was studied on a Roi-Et sandy loan (Aeric Paleaquults) in Northeastern Thailand. The leucaena grown on the ricefield bunds was lopped twice, before and during paddy cultivation and applied as leaf manure incorporated into the soil 21 days before transplanting, and as leaf-mulch 10 days before panicle primordia initiation. The study also compared the effects with and without added nitrogen fertilizer. The Leucaena N was more efficient in increasing rice yield than fertilizer N. Each kg of leucaena N yielded an average of 28.7 kg. of paddy whereas each kg. of fertilizer N yielded on average of 14.3 kg. paddy. In terms of fresh biomass, 10 kg. of leucaena loppings yielded an average of 2.4 kg. paddy. In addition, the leucaena resulted in higher soil N uptake, increased organic matter content, and greater available nitrogen retention in the soil.
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