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在自然条件下,小麦接种联合固氮菌(土生克雷伯氏菌)43菌株、获得了显著增产效果.本研究结果表明.其增产的主要原因是菌株与小麦根系结合.在根毛细胞、表皮细胞、皮层细胞的间隙及输导组织中存在大量的菌体细胞.在小麦抽穗期固氮酶活性达到148.8n mol C_2H_4株~(-1)h(-1),~(15)N稀释法测定固氮量占植株总氮量的15.3%～22.1%.由于菌株产酸,在砂培条件下,速效磷增加16.1%～39.7%.提高了植株磷素营养水平.同时菌株代谢物中存在生长素、赤霉素和细胞分裂素,可刺激植株生长发育.显然,小麦接种43菌株增产是因菌株固氮、解磷和产生多种激素综合作用的结果.
Under natural conditions, wheat was inoculated with the combination of azotobacter (Klebsiella pneumoniae) 43 strain, and the yield was significantly increased.The results showed that the main reason for the increase of wheat yield was the combination of the strain and wheat root.In root hair cells, epidermal cells , And there were a large number of bacterial cells in the gap of cortical cells and in the transplanted tissues.Nitrogenase activity reached 148.8n mol C_2H_4 -1 h -1 at heading stage and ~ Accounting for 15.3% -22.1% of the total nitrogen content of the plant.As the acidity of the strain, under the condition of sand culture, available phosphorus increased by 16.1% -39.7%, increased the phosphorus nutrition level of plants, and the auxin, Gibberellin and cytokinin, can stimulate plant growth and development.Obviously, wheat inoculation 43 strains increased production is due to strains of nitrogen, phosphorus and the result of a combination of multiple hormones.