<Abstrcat>In order to explore the evaporation and transpiration law of soil moisture in cropland in Loess Plateau of North Shaanxi,and to improve the efficiency of soil moisture use,by using TDR sensor to measure water content,the soil moisture of bare land,crop land and covered cropland in the drought terrace were watched systematically,then integrating the data of field automatic weather station,we analyzed the water evaporation law of farm land of the Loess Plateau hilly and gullied area:there are two intense evaporation periods in one year,vaporized volume in one year is 74.4% of annual precipitation.The period when there is no crop contributes more to water storage.Partially covered soil (film cover,covering ratio is 60%) is in favor of the conservation of soil water,and fully covered soil (combined cover and straw cover,covering ratio is 100%) is in favor of highly efficient use of soil water.Based on these studies,an efficient technological way of increasing soil water use is put forward:the utility of soil water can be enchanced by the cover technology of ditch and ridge covered with two materials,rotating crops between grass and grain avoiding the desolation of tillable field.
Journal of Northwest Sci-Tech Univ of Agr and
Loess Plateau of north Shaanxi
hilly and gully area
evaporation and transpiration of cropland
soil water environment