摘要
土壤吸力是土壤中水分运动的驱动力。依据土壤水动力学原理提出的根区局部控水无压地下灌溉技术是利用土壤毛管吸力或基质吸力作用,使水分通过输水毛管上的出水孔口进入作物根系层,以满足作物需水,灌溉时不需外加压力。试验表明这种灌水方法是可行的,无压灌溉系统不需任何动力设备为其提供压力,节约了能源。
The soil suction can be used as driving force for water movement in soil profile. Based on soil water dynamics a new irrigation technology of non-pressure subsurface irrigation (NSDI), which works under soil capillary suction or matrix suction was put forward. The new irrigation technology is designed that soil suction and crop evaporation can cause water entering crop roots from pipe aperture. Irrigation needs no power, and it can save cost and energy sources. The results indicate the feasibility of the me...
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2006年第11期80-83,共4页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(项目编号:50479051)和
农业科技成果转化资金项目(项目编号:04EFN217100395)
关键词
土壤吸力
无压灌溉
湿润体
入渗率
Soil suction force
Non-pressure irrigation
Wetted body
Infiltration rate
