[关键词]
[摘要]
通过冰雪融化期黑土水分野外观测试验, 对松嫩平原4 种不同积雪覆盖地表条件下的土壤总含水量变化规律 进行了分析。结果表明, 不同边界条件下, 土壤总含水量的变化趋势不同, 0~ 40 cm 土层的表现尤为显著, 显示出 土壤水分变化对地表条件的响应存在明显的时间差异; 积雪覆盖的反/ S0型水分剖面与裸地的反/ C0 型水分剖面主 要区别在于140 cm 以下土层。研究结果可为松嫩平原黑土区冻融期土壤水分调控与管理提供科学依据。
[Key word]
[Abstract]
On the basis of the field observat ion of black soil w ater dur ing the ice and snow thawing per iods, the v ariations o f to tal so il water co nt ent under fo ur different snow cov er conditio ns in the Song nen Plain w ere analy zed. The results show ed t hat the variatio n tendencies of to tal soil w ater content are differ ent under differ ent sur face conditions, especially in the so il lay er with the dept h o f 0~ 40 cm, and so il water var iatio n has obvio us r esponse time difference to the sur face co ndition. T he differ ence of so il water content between t he rev erse S2shaped moisture prof ile of snow cov ered soil and the r everse C2shaped moistur e pro file of bare so il ex isted in the soil layer below the depth of 140 cm. The r esear ch results can pro vide the scientific basis fo r the freez2 ing2thawing soil wat er contro l and manag ement in the black so il area of the Songnen Plain.
[中图分类号]
[基金项目]
黑龙江省教育厅科学技术研究项目( 12521016)