期刊
FIELD CROPS RESEARCH
卷 65, 期 2-3, 页码 93-106出版社
ELSEVIER
DOI: 10.1016/S0378-4290(99)00080-5
关键词
nitrogen fixation; legumes; Rhizobium; research needs; plant improvement; soil acidity and acidification; crop rotation; biotechnology
类别
Recent reports point to a decline in agricultural dependence on symbiotic nitrogen (N-2) fixation, and in the use of rhizobial inoculants. This review contrasts the potential contribution of biologically fixed N to intensive and extensive agricultural systems, and examines opportunities for continued major contributions in the latter, It identifies six research and extension areas in which in-depth efforts are still needed, and examines some opportunities for improved N-2 fixation likely to arise through advances in molecular biology. (C) 2000 Elsevier Science B.V. All rights reserved.
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