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在高山生态系统中,季节性雪被对土壤氮含量及转化有着重大影响.降雪是氮沉降的一种重要形式,直接影响着土壤中的有效氮含量;降雪形成不同厚度和持续期的雪被后,造成环境因子(土壤温度和含水量)和生物因子(土壤微生物、高山植物和高山动物)的异质性,进而对土壤中氮素矿化和微生物固持过程产生复杂的影响.本文重点介绍了持续性雪被消融期冻融交替影响土壤氮素矿化和流失的机制,并针对高山地区未来季节性雪被可能发生的变化,综述了野外原位模拟实验的主要研究成果,最后提出了开展季节性雪被对土壤氮影响研究的一些建议.
In alpine ecosystems, seasonal snow has a significant impact on soil nitrogen content and transformation, Snowfall is an important form of nitrogen deposition, which directly affects the available nitrogen content in the soil. Snowfall forms different thicknesses and durations of snow cover , Resulting in the heterogeneity of environmental factors (soil temperature and water content) and biological factors (soil microbes, alpine plants and alpine animals), which in turn has a complex impact on nitrogen mineralization and microbial retention in soil. The mechanism of intermittent freezing and thawing of continuous snow melting and thawing period affected the mineralization and loss of soil nitrogen. In view of the possible changes of seasonal snow in the mountainous area, the main research results of field in situ simulation were reviewed. Finally, Some Suggestions on Carrying Out Seasonal Snow Impacts on Soil Nitrogen.