不同地表条件下季节性冻融土壤的冻融特征分析  

Analying on Freeze-thaw Characteristics of the Seasonal Freeze-thaw Soil under Different Surface Treatments

作　　者：薛明霞[1] 

机构地区：[1]山西省水文水资源勘测局太谷均衡实验站,太谷030800

出　　处：《山西水利科技》2008年第1期19-21,共3页Shanxi Hydrotechnics

基　　金：国家自然科学基金项目<季节性冻融期不同地表条件下非饱和带土壤水分迁移转化规律的研究>(批准号:40472132)的部分研究内容

摘　　要：通过试验资料,分析了不同地表条件下,季节性冻融期土壤的冻融特征:裸地初冻时间早于地膜覆盖地约38天,早于玉米秸秆覆盖地约45天,早于秸秆和地膜二元覆盖地约47天;裸地最大冻结深度为60 cm,地膜覆盖地为42 cm,玉米秸秆覆盖地为35 cm,秸秆和地膜二元覆盖地为20 cm;地膜覆盖地完全解冻较裸地提前10天,玉米秸秆覆盖地完全解冻滞后裸地约7天;不同地表条件下土壤冻结强度按从小到大排列为裸地,地膜覆盖地,玉米秸秆覆盖地,秸秆和地膜二元覆盖地。By the tests data ,the paper analyses the freeze-thaw soil characteristics during the seasonal freezethaw period under different surface treatments .The beginning time of soil freezing in bare plot is 38,45,47days earlier than in plots mulched by plastic membrane ,by corn straw and by both plastic membrane ＆ corn straw .The maximum frozen depth in soil of bare plot ,of plot mulched by plastic membrane ,by corn straw and by both plastic membrane ＆ corn straw are about 60cm ,42cm,35cm and 20cm respectively .The entire thawing time of soil in bare plot is 10 days later than in plot mulched by plastic membrane, and is 7 days earlier than in plot mulched by corn straw .The kinds of plots in the order of frozen intensity of soil from large to smll are ：bare plot ,plot mulched by plastic membrane ,by corn straw and by both plastic membrane ＆ corn straw.

关 键 词：季节性冻融土壤 地表条件 冻融特征 

分 类 号：S152[农业科学—土壤学]