生物炭对微润灌土壤水分运动的影响  

Effects of Biochar Addition on Soil Water Movement under Moistube-irrigation

作　　者：许健[1] 牛文全[2] 李元[1] 薛万来[2] 张明智[3] 古君[1] 

机构地区：[1]西北农林科技大学水土保持研究所,陕西杨凌712100 [2]中国科学院水利部水土保持研究所,陕西杨凌712100 [3]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《节水灌溉》2015年第12期64-68,共5页Water Saving Irrigation

基　　金："十二五"国家863计划项目(2011AA100507)

摘　　要：生物炭可以改善土壤的持水能力,通过室内土箱模拟试验,研究了不同生物炭添加量对微润灌累计入渗量、湿润锋运移距离和湿润体含水率的影响。结果表明,添加生物炭能显著降低微润灌累计入渗量,抑制微润灌土壤水分的向上运移,促进微润灌土壤水分的侧向和向下运移。土壤中添加生物炭后,提高了微润灌湿润土壤的含水率,且随着生物炭添加量的增加而增大。生物炭改良土壤后可以提高微润灌的节水能力。Biochar addition can improve the soil water-holding capacity. Through indoor soil box simulation test, the effects of bio char addition on the cumulative infiltration, the wetting front and water content of wetted region of moistube-irrigation are studied. The results show that biochar addition can significantly reduce the cumulative infiltration, inhibit the upward migration of soil moisture, and promote the sideways and downward migration of soil moisture in moistube-irrigation. The water content of wetted region of moistube-irrigation increases with the increase of hiochar addition. Biochar addition can improve the water-saving ability of moistube-irrigation.

关 键 词：生物炭 微润灌 累计入渗量 湿润锋 

分 类 号：S275.4[农业科学—农业水土工程]