干旱胁迫条件下细菌多糖对玉米苗期抗旱性的影响

目的]探究干旱胁迫条件下细菌多糖对玉米苗期抗旱性的影响。方法]设置种子+土壤、菌液包衣种子+土壤、种子+土壤+80 ml发酵液、种子+土壤+80 ml灭活发酵液4个处理,研究不同处理对玉米苗期抗旱性的影响。结果]玉米种子经发酵液包衣后,种子发芽率较对照可提高112.7%;对发酵液不同施用方式效果的研究表明,土壤中添加活菌液的方式对提高玉米苗期抗旱能力作用最为显著,幼苗干物质积累量、叶片中叶绿素含量、根冠比、根体积等生长指标均有显著提高,分别较对照提高130.6%、11.5%、78.1%、300.0%。结论]该研究为有效发挥细菌多糖保水抗旱功能、开发农作物抗旱节水的新方法提供了一定的研究基础。

Effect of Bacterial Polysaccharides on Maize Drought Resistance in the Seedling Stage under Drought Stress

Objective] The purpose was to research the effect of bacterial polysaccharides on maize drought resistance in the seedling stage under drought stress.Method] 4 treatments of seed soil,seed coated with bacterial liquid soil,seed soil 80 ml fermentation liquid,seed soil 80 ml inactivated fermentation liquid were set up to study the influences of different treatments on maize drought resistance in the seedling stage.Result] The germination rate of maize seed coated with fermentation liquid could enhance 112.7% than CK.The research on the effects of fermentation liquid with different application patterns showed that the pattern of adding active bacterial liquid into soil had most significant effect on enhancing draught-resistant ability in the seedling stage.The growth indexes such as dry matter accumulation of seedlings,chlorophyll content in leaves,ratio of leaf to root,root volume all enhanced significantly,being 130.6%,11.5%,78.1%and 300.0% higher than CK respectively.Conclusion] The study provided certain research foundation for giving effective play to the water holding and draught resistant function of bacterial polysaccharides and developing the new method of water saving and draught resistance for crops.