马铃薯连作对根际土壤微生物生理类群的影响

发布时间：2018-04-19 18:47

本文选题：马铃薯 + 连作　；参考：《甘肃农业大学学报》2016年02期

【摘要】：【目的】探讨马铃薯连作对根际微生物生理类群的影响.【方法】以轮作(小麦)为对照,研究马铃薯连作1、3、5a根际土壤氨化细菌、亚硝化细菌、硝化细菌、纤维素厌氧细菌和好氧细菌的变化.【结果】种植小麦的轮作土壤细菌数量显著高于马铃薯连作土壤.在马铃薯块茎形成期土壤氨化细菌数量连作1a的比连作3a、连作5a的分别提高54.32%和224.68%,土壤硝化细菌数量连作1a的比连作3a、连作5a的分别提高42.86%和566.67%,土壤亚硝化细菌数量连作1a的比连作3a、连作5a的分别提高11.11%和104.08%.【结论】氨化细菌、硝化细菌、亚硝化细菌、好氧性纤维素分解菌和厌氧性纤维素分解菌的数量随着连作年限的增加数量显著减少.
[Abstract]:[objective] to study the effect of potato continuous cropping on rhizosphere microbial physiological group. [methods] the soil ammoniation bacteria, nitrite bacteria and nitrifying bacteria in rhizosphere soil of potato continuous cropping for 1 ~ 3 ~ 5 years were studied with rotation (wheat) as control. The change of cellulose anaerobic bacteria and aerobic bacteria. [results] the number of bacteria in wheat rotation soil was significantly higher than that in potato continuous cropping soil. The number of soil ammoniated bacteria in potato tuber formation stage was increased by 54.32% and 224.68% than that of continuous cropping for 1 year and 5 years, respectively. The number of nitrifying bacteria in soil was increased by 42.86% and 566.67% than that of continuous cropping for 1 year and 5 years, respectively, and the number of soil nitrifying bacteria was increased by 42.86% and 566.67% respectively in the period of potato tuber formation. The amount of continuous cropping for 1 year was 11.11% and 104.08% higher than that for 3 years and 5 years of continuous cropping respectively. [conclusion] ammoniated bacteria, The number of nitrifying bacteria, nitrifying bacteria, aerobic cellulose decomposing bacteria and anaerobic cellulose decomposing bacteria decreased significantly with the increase of continuous cropping years.
【作者单位】：甘肃农业大学园艺学院;甘肃省农业科学院土壤肥料与节水农业研究所;甘肃省农业科学院旱地农业研究所;
【基金】：国家自然科学基金项目“马铃薯连作土壤微生物种群演替及根系分泌物累积规律的研究”(41161042)
【分类号】：S532;S154.3

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