冻融交替对土壤氮素转化及相关微生物学特性的影响

发布时间：2018-11-19 21:36

【摘要】：土壤冻融是发生在中、高纬度及高海拔地区的一种常见的自然现象。冻融作用通过影响土壤物理性质及生物学性状进而对土壤氮素转化过程产生重要影响,但目前关于冻融作用对土壤氮素转化过程影响的研究结果还不尽一致,对于冻融作用下土壤微生物学特性的研究相对较少。本文着重论述了冻融作用对土壤氮素转化过程(有效氮素含量变化、氮素净矿化速率、氮素损失途径等)的影响,并对冻融作用下土壤微生物生理和代谢特性进行了归纳和总结,简要指出目前研究过程中存在的问题,并对未来研究方向提出展望。
[Abstract]:Soil freezing and thawing is a common natural phenomenon in middle, high latitude and high altitude areas. Freezing and thawing affect soil nitrogen conversion process by influencing soil physical properties and biological properties, but the results on the effects of freezing and thawing on soil nitrogen conversion process are not consistent. There are few studies on soil microbiological characteristics under freezing and thawing. In this paper, the effects of freezing and thawing on the process of soil nitrogen conversion (change of available nitrogen content, nitrogen net mineralization rate, nitrogen loss pathway, etc.) were discussed. The physiological and metabolic characteristics of soil microbes under freezing and thawing were summarized and the existing problems in the current research process were briefly pointed out and the prospects for future research were put forward.
【作者单位】：沈阳农业大学土地与环境学院;
【分类号】：S153.6;S154.3

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