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Enterobacter sp.NG-33是新筛选分离到能高效溶解不溶性无机磷且产吲哚乙酸的菌株。本研究采用盆栽方式,分析在黄潮土与缺磷土壤中,接种Enterobacter sp.NG-33对苗期玉米的根系发育及植株中氮磷钾含量的变化,探索菌株NG-33在不同土壤条件对苗期玉米生长的促生机制。结果表明,菌株NG-33能够在不同土壤条件下,提高玉米根系的根长、表面积、从根数目和分枝数,促进玉米根系的发育。在缺磷条件下,NG-33菌株促进了玉米根系对磷元素的吸收。而在黄潮土壤中该菌株可以促进玉米根系对氮和钾元素的吸收作用。因此,在土壤中接种Enterobacter sp.NG-33菌株能促进苗期玉米根系的发育并改善植株对氮、磷和钾元素的吸收。
Enterobacter sp.NG-33 is a new strain isolated and isolated to efficiently dissolve insoluble inorganic phosphorus and produce indoleacetic acid. In this study, potted plants were used to analyze the changes of root development and N, P and K content in the seedlings of inoculated Enterobacter sp. NG-33 in yellow soil and phosphorus-deficient soil. The effects of NG-33 on seedling growth, Maize growth promoting mechanism. The results showed that strain NG-33 could improve the root length, surface area, root number and branch number of maize roots under different soil conditions to promote the development of maize roots. In the absence of phosphorus, NG-33 promoted the uptake of phosphorus by maize roots. In yellow soil, the strain can promote the uptake of nitrogen and potassium in maize roots. Therefore, inoculation of Enterobacter sp. NG-33 in soil can promote the development of maize root system at seedling stage and improve the plant’s absorption of nitrogen, phosphorus and potassium.