摘要
通过对陕北毛乌素沙地不同农业措施土壤水分的观测分析,揭示出沙区土壤水分受补（灌）水量与农业措施如地下衬垫与地表覆盖的双重影响与控制,地下衬膜和地表覆膜抑渗、抑蒸保墒效应促进了土壤——作物——大气连续体系中水分有效循环,增加了耕层土壤贮水量,加大植物可利用的土层水分,从而使苜蓿增产,并可节水32%～40%,为沙区推广地下衬垫（膜）与地表覆盖（膜）节水技术提供科学依据。
Through observation and analysis of soil moisture regime under different farming practice in the Maowusu sand area in Northern Shaanxi province,this study discloses the double effects and control measures of soil moisture under different irrigation and farming practices such as subsurface lining and surface mulching.With subsurface lining and surface mulching,both deep percolation and soil evaporation are suppressed,which enhanced moisture circulation in the soil-plant-atmosphere continuum,increased moisture storage in the rootzone,and improved alfalfa yield and saved irrigation water by 32-40%.This research may provide scientific basis for wide use of subsurface lining and surface mulching.
出处
《地下水》
2007年第4期45-47,共3页
Ground water
关键词
陕北沙地
地下水资源
高效利用
土壤含水量
Sandy soil in northern Shaanxi
groundwater resources
effective use
soil moisture
