【摘要】 研究并探讨了蔬菜作物在施用耐氨固氮菌后的生长、生理反应及增产的效果和原因。试验结果表明： 施用耐氨固氮菌显著增加了蔬菜苗期生物量、叶面积和叶片的叶绿素含量， 同时还增强了植株的根系活力， 并有明显的增产效果。耐氨固氮菌促进增产的作用不仅与其本身的固氮作用有关， 还可能与其分泌出某些生长刺激物 （ 或激素） 有关。更多还原

【Abstract】 The growth, physiological response and effect of the increased production after application of ammonia-resistant strains of N 2-fixing bacteria on vegetable crops were investigated. The results showed that the application of the strains significantly increased the biomass of vegetable seedling, leaf area, chlorophyll content of leaf and root activity, and further led to a highly-increased production. The reason for increasing production lie in the N 2-fixing activity of the strains, and the direct reason includs the expanding of leaf area, higher chlorophyll content, and the improving of root activity after the strians application. It is implied that the growth stimulus (ou hormone) secreted by bacteria may partly contribute to the increased production.更多还原