摘要
基于田间入渗试验,以数理统计理论为基础,对5种不同地表条件下季节性冻融土壤入渗能力预报模型进行了探索研究。研究表明,不同地表条件下,不同影响因子对不同地表条件地块土壤入渗能力的影响显著性有所差异,0～10cm土层土壤含水率对入渗能力的影响是最显著的;其次为5cm土层深度处土壤温度,裸地土壤温度对入渗能力的影响不显著;冬小麦地和人工草地土壤入渗能力受气温的影响较显著,休闲裸地和玉米秸秆覆盖地次之,地膜覆盖地土壤入渗能力受气温的影响不显著。建立的0～10cm土层土壤含水率、5cm土层深度处土壤温度和气温三因子线性模型具有一定可行性,避免了考虑因素单一的缺点。
Field infiltration experiments were conducted to study the infiltration capacity predicting model for seasonal freezing and thawing soil under five kinds of surface conditions based on the statistics theory. The results showed that influences of different factors on soil infiltration capacity were different under dif- ferent surface conditions, and soil moisture at 0 to 10 cm had the most significant impact on soil infiltration capacity, then soil temperature at 5 cm came second. But soil infiltration capacity of bare plot was little af- fected by soil temperature at 5 cm. The impacts of air temperature under XLD and CD were the most sig- nificant, LD and JD came second, and MD was unobvious. Three-factor linear model based on soil mois- ture at 0 to 10 cm, soil temperature at 5 cm and the air temperature had certain feasibility, and avoided the drawback of predicting soil infiltration capacity by single factor.
出处
《灌溉排水学报》
CSCD
北大核心
2013年第4期35-39,共5页
Journal of Irrigation and Drainage
基金
国家自然科学基金项目(40472132)
山西省自然科学基金项目(2012011033-2)
关键词
入渗能力
季节性冻融土壤
预报模型
土壤水资源
infiltration capacity
seasonal freezing and thawing soil
predicting model
soil water resources
