单施和配施有机物料对沙化土壤微生物群落功能多样性的短期影响

发布时间：2018-06-22 13:58

本文选题：有机物料 + 沙化土壤　；参考：《中国土壤与肥料》2017年04期

【摘要】：为探讨施用有机物料对宁夏沙化土壤的改良效果,以当地易得的杨树枝条、玉米秸秆、牛粪为原料在2015年4~10月期间进行桶栽试验,采用Biolog技术研究了有机物料单施和配施对宁夏沙化土壤微生物群落功能多样性的短期影响。结果显示:(1)施用有机物料使土壤微生物利用碳源总量增加,微生物代谢活性增强。其利用比例较高的碳源类型为氨基酸类、胺类和碳水化合物类。(2)单施有机物料比配施有机物料对微生物代谢的促进作用强;单施杨树枝条粉碎物的土壤微生物平均颜色变化率在所有处理中最大,而且微生物各种多样性指数也有明显提高。(3)对各类碳源的利用强度与土壤易氧化有机碳、全氮含量和碳氮比之间表现出了密切的关系,微生物多样性指数则与土壤易氧化有机碳和无机氮存在紧密联系。本研究表明,土壤施入杨树枝条粉碎物后微生物代谢活性增强、土壤质量提高,对土壤改良有积极作用。
[Abstract]:In order to study the improvement effect of organic materials on sandy soil in Ningxia, pot experiment was carried out from April to October 2015 with poplar branches, corn stalks and cow dung as raw materials. Biolog technique was used to study the short-term effects of single and combined application of organic materials on the functional diversity of sandy soil microbial communities in Ningxia. The results showed that: (1) the application of organic materials increased the total utilization of carbon source and the metabolic activity of soil microorganisms. Amino acids and carbohydrates were the most important carbon sources. (2) only organic materials could promote microbial metabolism better than those with organic materials. The average color change rate of soil microorganism was the biggest in all treatments, and the diversity index of microorganism was also improved obviously. (3) the utilization intensity of various carbon sources and the easy oxidation organic carbon of soil. There was a close relationship between total nitrogen content and C / N ratio, and microbial diversity index was closely related to soil oxidized organic carbon and inorganic nitrogen. The results showed that the microbial metabolic activity was enhanced and soil quality was improved after the application of poplar branch comminuted material, which played a positive role in soil improvement.
【作者单位】：宁夏大学生命科学学院;种苗生物工程国家重点实验室;宁夏银川城市森林生态系统国家定位观测研究站;
【基金】：国家国际合作专项(2015DFA90900) 引进国际先进林业科学技术项目(2013-04-79)
【分类号】：S154.3

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