积雪对松嫩平原黑土浅层温度的影响分析

Snow cover is a common mulch condition on black soil surface of Songnen Plain during seasonal freezing and thawing period. In order to investigate the effect of snow cover on soil shallow temperature, the variations of soil shallow temperature under different snow cover conditions were analyzed based on the measured data of black soil shallow temperature in Songnen Plain. The results showed that snow cover baffled the heat exchange between soil surface and atmosphere, moderated soil temperature decrease in freezing period and obstructed soil temperature increase in thawing period, and a two-way heat insulation was the effect of snow cover on black soil shallow temperature. The research results could provide scientific supports for soil water and heat resources utilization of black soil region in Songnen Plain during freezing and thawing period.