根瘤菌和复合促生菌对大豆结瘤和生长的影响

为了研究不同根瘤菌和复合促生菌单独使用及复合后对大豆结瘤和生长的影响。采用大豆单独接种2种快生大豆根瘤菌、2种慢生大豆根瘤菌及根瘤菌分别与复合促生菌交叉接种,再种植的方法,观察大豆结瘤与生长情况。结果表明:(1)大豆结荚初期大豆快生和慢生根瘤菌处理的大豆地上部鲜重、地下部鲜重、结荚数、豆荚鲜重等生物学性状显著优于其它处理;快生根瘤菌处理的大豆结瘤率显著高于其它处理,慢生根瘤菌处理的总根瘤数和根瘤重量显著高于其它处理;(2)大豆结荚后期,对照处理的地上部鲜重、根鲜重显著高于其它处理,慢生根瘤菌和复合促生菌处理的根瘤数显著高于其它处理,快生根瘤菌剂处理的大豆粗蛋白含量显著高于其它处理,而复合促生菌处理的大豆产量显著高于其它处理。虽然快生根瘤菌两处理有利于地上部、地下部、有效根瘤数、土壤碱解氮的提升,但复合促生菌处理的大豆产量、土壤速效磷和土壤有效钾都显著高于其它处理,因此表明复合促生菌处理能增加大豆产量。

Influence of Combination of Rhizobia and Compound Growth-promoting Bacteria on the Nodulation and Growth of Soybean

To study the influence of combination of rhizobia and compound growth-promoting bacteria on the nodulation and growth of soybean,two fast-growing and two slow-growing soybean rhizobia combined with growth-promoting bacteria separately were used to inoculate soybean to observe the nodulation and soybean growth.The result indicated that as follows:(1) At the beginning of soybean podding,the fresh weight of above ground and underground part,pods number,pod fresh weight of the soybean inoculated with fast-growing and slow-growing rhizobia were significantly higher than other treatments.The nodule rate of soybean inoculated with fast-grower was significantly higher than others,while the total nodules number and nodule weight of soybean inoculated with slow-grower were significantly higher than others.(2) At the end of soybean podding,the fresh weight of above ground part and root were significantly higher than others.The nodules number of soybean inoculated with combination of slow-growing rhizobia and growth promoting bacteria were significantly higher than others,while the yield of soybean inoculated with only growth promoting bacteria was significantly higher than others.Inoculation of rhizobia solely to soybean could increase the pods number,pod fresh weight,fresh weight of above ground and underground part,inoculation with growth promoting bacteria solely could also increase the yield of soybean.