不同保墒条件下土壤温度日变化效应研究  

Daily Changing of Soil Temperature under Different Soil Water Conservation Treatment

作　　者：员学锋[1] 汪有科 

机构地区：[1]长安大学地球科学与国土资源学院,西安710054 [2]国家节水灌溉杨凌工程技术研究中心,陕西杨凌712100

出　　处：《灌溉排水学报》2008年第3期82-85,共4页Journal of Irrigation and Drainage

基　　金：国家863重大专项(2002AA224211)

摘　　要：通过田间试验监测和分析，研究了不同保墒条件下土壤温度日变化，结果表明，一日内不同处理的0～15cm处地温均可拟合为时间的正弦函数，其相关系数大小分别为：CK〉PAM处理〉地膜覆盖〉秸秆覆盖。研究确定了保墒灌溉条件下不同深度土壤温度的日表征时刻，分析了各表征时刻土壤温度沿深度变化的关系，发现任何处理的剖面土壤温度最大日变幅均有随土壤深度增加呈指数递减的趋势。研究结果显示，不同保墒条件下土壤温度日变化可以通过相同的方法进行预测。Based on the monitoring and analysis temperature under different moisture conserving of field experiments, we studied the daily change of soil irrigation （MCI）. The result showed that there are sine correlativity between soil temperature of 0 to 15 cm underground and air temperature in different treatment. The Correlation coefficient from lager to lower is CK, chemical control, plastic mulch, and straw mulch respectively. We confirmed the representative time of soil temperature at different soil depth under MCI in a day. Based the soil temperature data tested at different time in the field, found the connection model soil profile temperature at the characteristic time, opened out the changing rules of soil temperature, soil water, air humidity at 5 cm above soil surface and the connection among them under the MCI of straw mulching. Furthermore, we found maximal soil temperature at the soil profile changes exponential descending with the depth increasing. In the end, we drought a conclusion is that the changing of soil temperature in a day can be forecasted in a same way under different soil water conservation treatment.

关 键 词：田间试验 保墒灌溉 土壤温度日变化 

分 类 号：S152.8[农业科学—土壤学]