Study on effects of different dripper discharge on wetting soil characteristic of drip irrigation

The experiment was conducted to investigate the effect of different dripper discharge and irrigation amount on the characteristic value of soil wetted volume and the course of soil water distribution with drip irrigation in Jujube demonstration base of mountain micro-irrigation in Mizhi.The results show that horizontal and vertical advance distance of soil wetted front conforms to power function of infiltration time for point source drip irrigation and calculated value is all above 0.99;the soil wetted volume and the distribution of soil water content in wetted soil controlled by dripper discharge and irrigation amount. The soil wetted volume reduced and average moisture content increase with dripper discharge increase under same irrigation amount.Some models were presented to predict horizontal and vertical wetting front and volume of wetted soil.