不同紫云英品种与根瘤菌匹配对结瘤固氮的影响

研究不同紫云英品种与根瘤菌匹配后对紫云英的结瘤固氮影响。结果表明：M10根瘤菌种可分别显著提高8410441、闽紫6号、弋江籽的固氮酶活性、紫云英根瘤数、紫云英根瘤鲜重；ZLH2根瘤菌显著提高8410441紫云英地上部鲜重，ZK7根瘤菌提高闽紫1号紫云英全氮含量。从总固氮量来看，M10、XZ、ZLH2、ZK7、M3根瘤菌分别对提高闽紫6号、8324411、8410441、余江大叶、弋江籽品种的总固氮量效果最佳，其中以ZLH2对8410441的总固氮量最高。固氮酶活性与根瘤数呈极显著负相关，根瘤数与根瘤重呈极显著正相关，产量、全氮含量与总固氮量呈极显著正相关。通过多指标综合评价发现，ZLH2对闽紫6号、8410441的促生效果较好；M10对8324411和弋江籽的促生效果较好；ZK7对余江大叶的促生效果较好。

Effect of Matching Astragalus sinicus L . with Rhizobium on Nodule Formation and Nitrogen Fixation

The research aimed on the effect of matching between varieties of Astragalus sinicus and strains of Rhizobium on forming root nodule of milk vetch .The results showed that ：rhizobium M10 enhanced nitrogenase activity significantly in variety 8410441 ,Minzi 6 and Yijiang ,increased the number of root nodules and their fresh weight .Rhizobium ZLH2 increased fresh weight of plants for variety 8410441 remarkably and rhizobium ZK7 increased total nitrogen content of variety Minzi 1. The strains M10 ,XZ ,ZLH2 ,ZK7 and M3 exhibited improving effect in nitrogen fixation for varieties Minzi 6 ,8324411 ,8410441 ,Yujiang Daye ,and Yijiang ,respectively , especially in the best effect of ZLH2 .The nitrogenase activity of the azotobacter was negative correlation with the number of root nodules but increaseing nodule weight significantly ,while total fixation amount of nitrogen was correlative positively with milk vetch yield and nitrogen content .Over all ,strain ZLH2 was optimal in enhancing the growth of Minzi 6 and 8410441 ,strain M10 was good to 8324411 and Yijiang ,and strain ZK7 was to Yujiang Daye .