Effects of Spring Irrigation Temperature and Water on Soil Salinity during the Non-crops Growing Season in Cotton Field with Drip Irrigation

【Objective】 The long-term drip irrigation in Xinjiang oasis irrigation area resulted in the accumulation of salt in the soil, and the rational irrigation in the non-crops growing season has a certain leaching effect on the soil salt. To study the effect of irrigation temperature and irrigation water on soil salinity and to provide a reasonable irrigation scheme for irrigation area in non-crops growing season. 【Method】Six irrigation schemes for cotton fields were formulated, field experiments were carried out in Korla area, Bazhou, Xinjiang, and the soil salt content under these six irrigation schemes was detected. Finally the effects of irrigation amount and temperature on soil salinity in non-crops growing season irrigation were analyzed through the experimental results. 【Result】Among the three irrigation water schemes: 2,250 m³/hm², 1,800 m³/hm² and 1,350 m³/hm², 2,250 m³/hm² was a better one. The effect of desalination under the situation that ground temperature was 5℃, the atmospheric temperature at 12℃ was better than that when the ground temperature was 10℃ and the effect of irrigation at 17℃ was even better. the atmospheric temperature is 17℃.【Conclusion】The results showed that the more irrigation water, the better soil leaching effect. Under the same irrigation amount, temperature has a great influence on the desalination effect of soil. Besides, due to the strong evaporation of the experimental area, the rate of salt back to soil is very fast, so the spring irrigation time should not be too early.