Traits of the Genus Crotalaria Used as a Green Manure Legume on Sustainable Cropping Systems

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X
40-04-02.pdf308.66 KB

To evaluate the potentials of growth and nitrogen (N) fixation of genus Crotalaria used as green manure, interspecific differences in dry matter production, root nodule formation, and N uptake among several species were investigated in field and pot experiments at Osaka, Japan. C. juncea, C. spectabilis, C. pallida, and C. incana exhibited vigorous vegetative growth, expanding leaf area and branching, and they began to flower in mid-July to early August. C. juncea had a high dry weight and a great N content at early growing stage probably due to faster root nodule formation. On the other hand, C. pallida grew slowly at the early stage due to slower nodulation, but had a high N content at the late stage. Incorporation of each species provided a large amount of N necessary for the succeeding wheat crops. Several indicators for rapid decomposition of the plants, such as total C, N and lignin contents, were investigated, and the possible increases in N supply and growth inhibition by incorporation to wheat crops were discussed. N-absorbing activity of C. juncea grown under the excess N condition (70 gN m-2) was also evaluated. The proportion of fixed N to total N was less than 1%, and the C/N ratio was significantly lower than that in Z. mays, suggesting that this plant species could be also useful as a cleaning crop.

作成者 DAIMON Hiroyuki

cleaning crop

crop rotation


nitrogen fixation


公開者 Japan International Research Center for Agricultural Sciences
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
開始ページ 299
終了ページ 305
DOI 10.6090/jarq.40.299
権利 Japan International Research Center for Agricultural Sciences
言語 eng