RESEARCH REPORTS FROM INSTITUTE FOR AGRO-MICROBIOLOGY, Vol. 3, 1999 p.95-109
Copyright © Institute for Agro-Microbiology. All Rights Reserved.

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GRANT REPORT

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9.Experimental Evaluation of Legume Residues on the Effects of Fertilizer and Inhibitor of Weed Occurrence in the Legume Mulch and No-Tillage Rice Cultivation Method for Low-Input Sustainable Farming

Kazumasa Hidaka and Takuya Mineta(College Research Farm, College of Agriculture, Ehime University)

An experimental rice cultivation with legume living mulch and no-tillage, as an example of energy low-input sustainable farming systems, were conducted under no usage of synthetic chemicals. Three kind of legumes, the Chinese milky vetch, white clover and hairy vetch , and abundant treatment as a control plot with two replications have been designed systematically since 1995 in collage research farm of Ehime University. Yield of rice grain in 1997 was around the level of 500kg/10a in any legumes in the exception of less than 300kg/10a in control plot. Especially yield in hairy vetch living mulching was relatively higher than other legumes and weed was much less abundant than others. It was suggested, from the results of the amount of residuary living mulch, an allelopathic test in vitro of water of living mulch, that weeds might be suppressed by the effect of coverage and allelopathy which residious living mulch of hairy vetch. NH4-N density in soil water in hairy vetch mulching treatment was higher than Chinese milky vetch, and these pattern of NH4-N density in no-tillage condition maintains in the lower level of density than the well-known pattern in conventional tillage condition.

キーワード／Keywords
草生マルチ／living mulch、マメ科緑肥／leguminous plant manure、他感作用／allellopathy、不耕起／no-tillage、雑草管理／weed management、低投入持続型水稲栽培／low-input sustainable rice cultivation