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为了从土壤微生物学角度评价华北潮土在不同耕作方式下的肥力与质量,利用中国科学院封丘农业生态实验站玉米-小麦轮作免耕定位试验平台,研究了不同耕作方式(翻耕、免耕、玉米季免耕-小麦季翻耕)对土壤碳、氮、磷含量及相关微生物学性状的影响.结果显示,与翻耕相比,3年持续免耕或仅玉米季免耕对土壤pH、全氮、全磷、矿质氮和速效磷以及微生物生物量(碳、氮、磷)、基础呼吸强度和微生物代谢熵等均没有产生显著影响,但持续免耕处理土壤有机碳含量、关键酶活性(脱氢酶、转化酶、脲酶与碱性磷酸酶)以及微生物代谢活性等均显著升高(P<0.05),而玉米单季免耕处理除脲酶活性没有变化外,其余5个指标也均趋于升高.结果表明,免耕种植模式在保育土壤微生物代谢活性和促进土壤养分转化等方面起着重要作用,而玉米单季免耕处理次之.
In order to evaluate the fertility and quality of the Chao soil in different tillage systems from the perspective of soil microbiology, the effects of different tillage methods (tillage and no tillage) were studied using the platform of corn-wheat rotation-no-tillage positioning experiment at Fengqiu Agro-Ecological Experimental Station, Chinese Academy of Sciences. , Tillage with no-tillage and tillage with wheat season) on soil carbon, nitrogen and phosphorus contents and related microbiological traits.The results showed that compared with tillage, , Total nitrogen, total phosphorus, mineral nitrogen and available phosphorus as well as microbial biomass (carbon, nitrogen and phosphorus), basic respiratory intensity and microbial metabolic entropy, but no significant effect was observed on soil organic carbon content and key enzyme Activity (dehydrogenase, invertase, urease and alkaline phosphatase) and microbial metabolic activity were significantly increased (P <0.05), while the single season no-tillage treatment in addition to urease activity did not change, the other five indicators The results showed that the no-tillage mode played an important role in conservation of soil microbial metabolic activity and promotion of soil nutrient conversion, while the no-tillage treatment of corn was the second.