摘要
为研究覆膜对土壤水热运移的细微影响,利用土壤水热盐自动监测系统(ECH2O)对西北干旱区的玉米地进行了高分辨率的定点连续监测。发现覆膜对改善土壤表层水热状况有显著效果,覆膜处理下表层土壤含水量低于不覆膜处理,地温高于不覆膜处理对应值。在10cm深度,覆膜处理的土壤含水量较不覆膜处理低;而在20cm及40cm深度,覆膜处理的土壤含水量较不覆膜处理高。覆膜对不同深度地温均有提升作用,但在玉米不同生育阶段其影响程度不同:覆膜对地温的影响在生育末期最为显著;在10cm深度,覆膜处理的地温高于不覆膜处理,在40cm和60cm深度,差异较小。
In this study,high-resolution soil water-heat-salt automatic monitoring systems（ECH2O） were used to continuously monitor the maize fields in fixed points in arid area of Northwest China.According to the observation data,plastic film mulching had remarkable effect on improving soil surface water and heat conditions.The water content of soil surface with plastic film mulching was lower than without it,while the soil temperature was higher.At the 10 cm depth,the water content of soil was lower with plastic film mulching than without it;but at the 20 cm and 40 cm depths,the result was opposite.Plastic film mulching was able to promote the soil temperature,but the degree was different at different periods of maize and different soil depths.At the 10cm depth,the soil temperature with plastic film mulching was higher than without it,while at the 40 cm and 60 cm depths the difference was smaller.
出处
《灌溉排水学报》
CSCD
北大核心
2012年第1期69-72,共4页
Journal of Irrigation and Drainage
基金
国家自然科学基金重点项目(50939005)
高等学校博士学科点专项科研基金(20100008120026)
关键词
覆膜
玉米
ECH2O
土壤含水量
地温
plastic film mulching
maize
ECH2O
soil water content
soil temperature
