Abstract: In this paper, the effect of drip irrigation with salty water on soil organic carbon content in rhizosphere of jujube at its different growth stages was explored based on the experiment of field drip irrigation with salty water under different irrigation quotas and different salinity levels of irrigation water. The results showed that the soil organic carbon content varied with soil depth, salinity level of irrigation water and irrigation quotas, and its curve was Sshaped. The salinity affecting soil organic carbon content was in an order of 3 g/L>4 g/L>freshwater>2 g/L, organic carbon content in topsoil 10-30 cm in depth was higher than that in soil layer of 30-50 cm, but the organic carbon content in soil layer of 30-40 cm was relatively low. When the salinity of irrigation water was constant, the effect of irrigating quota on soil organic carbon content was in an order of 30 L>20 L>10 L, which indicated that an appropriate increase of irrigating quota was an effective way of soil desalination when jujube was irrigated with salty water. Compared with other treatments, drip irrigating quota of 30 L and 2 g/L salinity of irrigation salty water could significantly promote the utilization of soil organic carbon in rhizosphere of jujube.

Key words: salty waterdrip irrigationjujubesoil organic carbon content, Aral, Xinjiang