Abstract:

To establish high-efficient water saving intercropping patterns, a field experiment was conducted to investigate soil evaporation characteristics and water use efficiency under intercropping systems. The results showed that, the daily soil evaporation and total soil evaporation under high irrigation level of intercropping treatment was higher than that of other treatments; with increasing irrigation, total water consumption increased under intercropping treatments. Average daily soil evaporation was positively correlated with water content in the 0-30 cm soil profile; although evaporation and water consumption in intercropping system increase with increasing irrigation quota, overall WUE actually decreases. In general, keep the soil water content was 65% of field maximum capacity can not affect yield and economic efficiency, reduce invalid evaporation, improve water use efficiency.