冬季积雪与冻融对土壤团聚体稳定性的影响

发布时间：2018-01-01 12:42

本文关键词：冬季积雪与冻融对土壤团聚体稳定性的影响　出处：《北京林业大学学报》2016年04期 　论文类型：期刊论文

【摘要】：以长白山地区3种不同林型土壤为研究对象,利用野外采样观测与室内模拟培养相结合的方式,研究积雪与冻融过程对土壤团聚体稳定性的影响。结果表明:1)冬季冻融过程使白桦成熟林土壤团聚体稳定性(MWD)出现显著下降(P0.01),但并未显著影响白桦幼龄林和阔叶红松成熟林。冬季冻结及春季冻融过程都能显著影响团聚体MWD值(P0.01);2)提前雪盖能够防止土壤秋冬季冻融及冬季土壤结冻,并能够显著增加团聚体MWD值,但并不能防止春季融雪冻融阶段团聚体MWD值下降。3)土壤团聚体在冻融过程中受到不同冻融次数、不同林型以及不同含水率影响,差异显著。本文的研究结果表明,气候变暖、冬季降水格局变化这些全球变化因素能够影响到雪盖、土壤温度、湿度等因素,从而影响土壤团聚体稳定性。
[Abstract]:3 different forest types of soil in Changbai Mountain area as the research object, sampling observation and indoor simulation training combination using field, effects of snow and freezing thawing process on soil aggregate stability. The results show that: 1) the winter freeze thawing process to mature birch forest soil aggregate stability (MWD) decreased significantly (P0.01), but did not significantly affect the birch sapling forest of Pinus koraiensis and mature broadleaf forest. Freezing in winter and spring thawing process can significantly affect the aggregate value of MWD (P0.01); 2) in advance to prevent soil in autumn and winter snow and freezing thawing of frozen soil in winter, and can significantly increase the aggregate value of MWD, but does not prevent spring snow thawing stage aggregate MWD decreased.3) of soil aggregates affected by different freeze-thaw cycles in the freezing thawing process, different forest types and different influence of water content, the difference was significant. The results of this study show that climate warming, The global change factors of winter precipitation pattern changes can affect the snow cover, soil temperature, humidity and other factors, which affect the stability of soil aggregates.

【作者单位】：大连大学现代农业研究院;中国科学院沈阳应用生态研究所森林与土壤生态国家重点实验室;大连金州农业管理服务中心;
【基金】：国家自然科学基金重点项目(41330530);国家自然科学基金项目(41430639) 大连大学博士启动专项;大连大学优秀青年博士专项
【分类号】：S714
【正文快照】： LOU Xin1,2;GU Yan3;ZHANG Jun-hui2;HAN Shi-jie2.Effects of snow cover and freeze-thawcycles on stability of surface soil aggregates in forest.Journal of Beijing Forestry University(2016)38(4)63-70[Ch,30 ref.]1 Institute of Modern Agricultural Research,Dal

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