北京林业大学学报2016，Vol.38Issue(4)：63-70,8.DOI:10.13332/j.1000-1522.20150435
冬季积雪与冻融对土壤团聚体稳定性的影响
Effects of snow cover and freeze﹣thaw cycles on stability of surface soil aggregates in forest
摘要
Abstract
Snow cover is an important ecological factor that can affect soil freezing﹣thawing process by changing the heat exchange between atmosphere and soil, and therefore impact soil aggregates. We conducted laboratory incubation experiment and field sampling to study the effects of snow cover and freeze﹣thaw process on the stability of soil aggregates in three types of forest in Changbai Mountains, northeast China. The results showed that: 1 ) the winter freeze﹣thaw process significantly decreased the stability of soil aggregates in the mature broad﹣leaf forest ( P<0. 01 ) , but did not significantly affect that of the young broad﹣leaved forest and mature broad leaf﹣Korean pine mixed forest. The stability of soil aggregates was significantly affected by freeze in winter and freeze﹣thaw process in spring. 2) Snow cover in advance can prevent soil freeze﹣thaw process in early winter and freezing in winter and therefore significantly increase aggregate stability value, but cannot prevent the decrease of soil aggregate stability value during the spring freeze﹣thaw process. 3 ) Forest type, freeze﹣thaw cycles and water content significantly influence soil aggregates stability. In conclusion, the soil aggregates stability can be affected by the global climate changes such as climate warming and precipitation pattern change through changing factors like snow cover, soil temperature, and soil moisture.关键词
冻融循环/水稳性团聚体/温带森林/林型Key words
freeze﹣thaw cycles/water﹣stable aggregate/temperate forest/forest type分类
农业科技引用本文复制引用
娄鑫,谷岩,张军辉,韩士杰..冬季积雪与冻融对土壤团聚体稳定性的影响[J].北京林业大学学报,2016,38(4):63-70,8.基金项目
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。 （41330530）
