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中国农业菌种保藏中心从我国九省、市、自治区的11个不同生态环境中收集到57株快生型大豆根瘤菌,通过水培、沙培试验,对其生物学特性进行了鉴定,通过固氮酶活性、植株干重、茎叶含氮量的测定,明确了快生型大豆根瘤菌总的共生特点.快生型大豆根瘤菌大多能与相适应的中国栽培大豆有效共生,固氮酶活性一般在200～300nMC_2H_4/克鲜瘤.分单株干重和茎叶含氮量比不接种对照提高1倍左右,比慢
57 strains of fast-growing soybean Rhizobium were collected from 11 different ecological environments of China’s 9 provinces, municipalities and autonomous regions. Their biological characteristics were identified through hydroponics and sand culture experiments. Nitrogenase activity, plant dry weight, and nitrogen content in stems and leaves were determined, and the symbiotic characteristics of fast-growing soybean rhizobia were clarified. Most rapid-growth soybean rhizobia could coexist with Chinese soybean cultivated adaptively, nitrogenase activity Generally in the 200 ~ 300nMC_2H_4 / g of fresh tumor. The dry weight per plant and stems and leaves of nitrogen than the non-inoculated control increased about 1 times slower than the slow