Effects of Different Irrigation Based on Soil Water Potential on Growth and Yield of Rice

With hybrid rice cultivars Liangyou Peijiu as experimental materials,using tensiometer to determine the soil water potential 15 cm under soil surface,four treatments T1,T2,T3,T4 were set up for soil potential-10,-30,-50,-70 kPa,and CK was the continuous flood irrigation.Observing the growth and yield of rice under the different irrigation treatments,it was found that compared with continuous flood irrigation,the intermittent irrigation based on tensiometer can promote the rice to grow and get higher yield,and the irrigation water use efficiency of rice is also improved greatly under intermittent irrigation.The result showed that the soil potential about-30 kPa is the better lower limit value for rice irrigation,and it is also an easy method to guide the rice irrigation in the central China.