【摘要】 以生菜为试材,采用200、300、400、500倍浓度梯度的褐球固氮菌对生菜进行灌根处理,以清水为对照(CK),测定了叶数、叶长、叶宽、茎粗、根长、根重、经济产量等形态指标和叶绿素、氨基酸、全氮含量等生理指标。结果表明:300倍浓度的褐球固氮菌可以促进生菜的生长,与CK相比达到了极显著差异水平;提高了叶绿素和氨基酸含量,且与CK相比达到了极显著差异水平;降低了植株体内的氮含量,与CK相比达到了极显著差异水平;提高了基质中氮含量,与CK相比达到了显著差异水平。更多还原

【Abstract】 In order to study the appropriate concentration of Azotobacter chroococcum Beijerinck,reduce the N fertilizer application and enhance the lettuce growth,the lettuce was irrigated by using the concentration gradient 200,300,400and500 times Azotobacter chroococcum Beijerinck and the water as control.The morphology index such as leaf number,leaf length,leaf width,stem thick,root length,root weight,yield etc.and the physiology index such as chlorophyll content,aminophenol content,total nitrogen content were measured.The results showed that the 300 times of Azotobacter chroococcum Beijerinck could contribute to the growth of lettuce reaching extremely significant level comparing with CK;and increased the content of chlorophyll and aminophenol reached extremely significant level comparing with CK;and decreased the N content of plant reached extremely significant level comparing with CK;and enhanced the N content of the substrate reached significant level comparing with CK.更多还原