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In order to study the efficient water-saving drip irrigation system of pear-jujube in the loess hilly region of northern Shaanxi, the eight-year-old pear-jujube tree was used as the research object to study the soil water distribution and pear water content of different dates of drip irrigation (100, 135 and 180 m3/hm2) in pear jujube forest. It effected the jujube growth and development. The results showed that the average soil water content of high, medium and low irrigation quota before and after irrigation was higher than that of un-irrigated land by 1.95%, 1.92% and 1.66%, respectively. The average soil moisture content of high, middle and low irrigation levels in soil layers at 0-100cm depth increased by 4.90%, 4.01%, and 2.63% compared with CK, respectively. There was no significant difference in the growth rate of jujube between the three irrigation treatments during the whole monitoring period, but they were all significantly higher than those of CK. The water consumption increases with the increase of irrigation quota, while the law of water consumption strength and the law of water consumption are not the same. The average water intensity of the high, middle and low irrigation quota treatments was 1.12, 0.88, and 0.69 mm/d, higher than that of no irrigation. The highest yield of high irrigation quota was 16772.80kg/hm2. The output of jujube trees treated with high, medium and low irrigation quotas increased by 6.00%, 5.28%, and 4.37%, respectively, compared with no irrigation. The water use efficiency of jujube trees with high, medium and low irrigation rates was 1.32, 1.55, and 1.73 kg/m3, respectively. The irrigation yield of jujube trees with high irrigation quota was increased by 1.56%, and the irrigation water production efficiency was reduced by 23.71%. Better plan with low irrigation quota.

Effects of Different Drip Irrigation Quotas on Soil Water Distribution and Growth and Development of Pear-jujube