Effect of pressure heads and soil bulk density on water infiltration under moistube irrigation
In order to investigate the relationship between water's infiltration and different pressure heads and bulk density under moistube irrigation,treatmenst of three pressure heads (2.0、1.5、1.0 m) and three bulk density (1.20,1.30,1.40 g· cm-3) were conducted by soil culture experiments.Three indicators,accumulative infiltration,wetting front and soil water content were measured.The result revealed that the accumulative infiltration of water was positively related with pressure heads,but negatively with soil bulk density.The discharge of moistube was linearly related with pressure heads under air and burying.The wetting front was an approximate circle with a moistube centre.The horizontal movement distance and the vertical upward movement distance were larger than the vertical downward movement,and gravity had certain effect on water movement under moistube irrigation.However,the effect was weaker and weaker with the increasing soil bulk density.
国家科技期刊平台
NSTL
万方数据
维普
