Evaluation of N2—Fixing Capacites of Herbaceous and Shrub Legumes Under Field Condition

编号 zgly0000177734

文献类型 期刊论文

文献题名 Evaluation of N2—Fixing Capacites of Herbaceous and Shrub Legumes Under Field Condition

作者 XJINGGUANGXI  SHISHULIAN 

作者单位 InstituteofSoilScience 

母体文献 PEDOSPHERE;土壤圈: 英文版 

年卷期 1998,8(1)

页码 33-36

年份 1998 

分类号 S541.5  Q949.751.9 

关键词 草本  自然氮  富集机理  灌木  固氮作用  磷肥  豆科植物  豇豆  胡枝子 

文摘内容 Natural ^15N abundance method was used in this study to investigate the N2-fiing capacities of several herbaceous and shrub legumes by a field experiment,For herbaceous legumes,the results were in consistent with those obtained by a pot experiment .Crotalaria mucronata Desv.had a higher,N2-fixing capacity than Vigna sinensis(L.)Savi.For shurub legumes,N2-fixing Capacity under field condition was slightly different from that in pot experiment.These results demonstrated that the natural ^15N abundance method was applicable to evaluating N2-fixing capacities of herbaceous and shrub legumes,and that pot experiment was suitable for evaluating the N2-fixing capacities of not only herbaceous legumes but also shrub legumes. Leguminous N2-fixing plants differed in response to phosphorus fertilization,Phosphorus fertilizer appication greatly increased the percentage of nitrogen derived from air (% N dfa)and total amount of N2 fixed by Lespedez formosa(Vog.)Koehne (Jiangxi),Phosphorus fertilizer showed no signifcant effect on the N2-fixing percentage of Cajanus cajan(L.)Millsp.but increased its total biomass,thus increasing the total amount of N2 fixed。