8Bond D A,Lawes D A,Hawtin G C,Saxena M C,Stephens J H.Fababean (Vicia faba L.) In:Summer field R J,Roberts E H,ed.Grain Legume Crops.Collins,London,1985:199～265
9Jensen E S.Grain yield,symbiotic N2 fixation and interspereifie competition for inorganic N in pea/barley intercrops[J].Plant Soil,1996,182:25～38
10Fujita K,Ofosu-Budu K G,Ogata S.Biological nitrogen fixation in mixed legume-cereal cropping system[J].Plant and Soil,1992,141:155～175
