枝顶孢霉制剂防治根结线虫过程中土壤酶活性和微生物数量的变化

发布时间：2018-07-27 09:42

【摘要】：为了了解枝顶孢霉制剂在设施黄瓜根结线虫防治过程中对土壤微生态环境的影响,通过田间试验研究了黄瓜不同生长期土壤酶活性和微生物数量变化。结果发现,枝顶孢霉制剂对土壤酶活性和微生物数量的影响在幼苗期较显著,盛果期和拉秧期影响较小;幼苗期,土壤脲酶活性降低,蔗糖酶活性升高,过氧化氢酶和磷酸酶变化不显著;土壤中细菌数量减少,放线菌数量变化不显著,真菌数量增加;盛果期仅蔗糖酶活性提高,拉秧期土壤酶活性和微生物数量变化均不显著;土壤微生物数量和土壤酶活性具有一定相关性,且随黄瓜生长期发生变化。结果表明,枝顶孢霉制剂对土壤微生态环境的影响主要在幼苗期,此影响有利于黄瓜幼苗生长和根结线虫的防治。
[Abstract]:In order to understand the effect of Cucumber root knot nematodes on soil microenvironment, the changes of soil enzyme activity and microbial quantity in different growth stages of cucumber were studied by field experiments. The results showed that the effects of Cladosporium on soil enzyme activity and microbial quantity were significant in seedling stage, but had little effect in fruit stage and seedling drawing stage, but soil urease activity decreased and sucrase activity increased in seedling stage. The changes of catalase and phosphatase were not significant, the number of bacteria decreased, the number of actinomycetes did not change significantly, the number of fungi increased, the activity of sucrase increased only in the fruit stage, but the change of soil enzyme activity and the number of microorganism in the seedling drawing stage were not significant. There was a certain correlation between soil microbial quantity and soil enzyme activity, and it changed with the growth period of cucumber. The results showed that the effect of Cucumber Cucumber growth and root-knot nematodes on soil microecological environment was mainly in the seedling stage, which was beneficial to the growth of cucumber seedlings and the control of root-knot nematodes.
【作者单位】：陕西省微生物研究所;
【基金】：陕西省科学院重大专项(编号:2012K-03);陕西省科学院青年人才培养专项(编号:2014K-30) 陕西省农业科技创新项目(编号:2012NKC02-14) 陕西省西安市科技局农业技术研发项目[编号:NC1404(1)]
【分类号】：S154;S436.421

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