短期玉米秸秆还田对土壤细菌多样性的影响

发布时间：2018-03-04 00:04

本文选题：秸秆还田　切入点：土壤细菌多样性　出处：《干旱区资源与环境》2017年09期 　论文类型：期刊论文

【摘要】：为揭示秸秆还田土壤细菌群落结构及其差异。在春玉米吐丝期,利用高通量测序技术,结合相关生物信息学分析,研究常规秸秆不还田(CK)、秸秆深翻还田(SF)和秸秆旋耕还田(XG)3个处理下,0-10cm、10-20cm、20-30cm 3个土层细菌群落丰富度、多样性和群落结构变化。秸秆还田对土壤细菌多样性影响较大,细菌菌群Alpha多样性及样品属水平群落组成丰度分析可知,XG及SF 10-30cm土层细菌多样性均比CK的高。CK中纤维素分解菌为鞘氨醇单胞菌属,而XG和SF中纤维素分解菌多样化,其中节杆菌属、湖沉积杆菌属、噬几丁质菌和乳杆菌属相对丰度较高。SF表层土壤固氮、解磷、解钾等功能细菌多样性均比XG的高。秸秆深翻还田提高土壤纤维素降解菌、固氮、解磷、解钾功能细菌多样性。
[Abstract]:In order to reveal the soil bacterial community structure and its difference in straw returning field, the high-throughput sequencing technique was used to analyze the soil bacterial community in spring maize at silking stage, combined with bioinformatics analysis. The soil bacterial community richness, diversity and community structure were studied under the three treatments of conventional straw not returning to the field (CK), straw returning to the field (SF) and straw returning to the field (XG). The soil bacterial community richness, diversity and community structure were studied under the three treatments of 0-10 cm ~ (10 ~ (-20) cm ~ (20) cm ~ (-20) cm ~ (-1) ~ (-1) ~ (-1)). The Alpha diversity of bacterial flora and the abundance of sample horizontal community composition showed that the bacterial diversity in XG and SF10-30cm soil layer was higher than that in CK. The cellulose decomposition bacteria in CK were sphingomonas, while in XG and SF, Cellulolytic bacteria were diversified. Among them, Arthrobacter, Lactobacillus, chitinophagotic bacteria and Lactobacillus are more abundant than XG. The diversity of nitrogen fixation, phosphorus release, potassium decomposition and other functional bacteria in the surface soil of SF is higher than that of XG. The diversity of bacteria in the function of phosphorus and potassium.
【作者单位】：内蒙古民族大学农学院;内蒙古农业大学职业技术学院;
【基金】：国家科技支撑计划(2011BAD16B13,2012BAD04B04,2013BAD07B04) 内蒙古自治区饲用作物工程技术研究中心项目(MDK2016028) 内蒙古民族大学博士科研启动基金(BS329)资助
【分类号】：S141.4;S154.3

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