Effects of Soil Water Regulation on the Cotton Yield, Fiber Quality and Soil Salt Accumulation under Mulched Drip Irrigation in Southern Xinjiang, China

To optimize suitable water-saving and soil salt-controlling irrigation needed for the high yield good quality of cotton in southern Xinjiang, a field experiment was carried out to study effects water lower limits on consumption, use efficiency (WUE), yield, fiber salt accumulation under mulched drip Korla, Xinjiang. The capacity (FC) regarded as upper limit moisture, five (85% FC, 75% 65% 55% 45% referred T1~T5, respectively) were designed during growth period. results indicated that frequency quota gradually increased with increase limit, while consumption modulus T2 treatment critical period demand arrived at maximum value. Moreover, decrease WUE, micronaire value maturity index increased, whereas nitrogen partial factor productivity (PFPN) breaking elongation decreased. However, when exceeded had little effect PFPN improvement, 7146.4 kg∙hm−2 23.82 kg∙kg−1, respectively, In addition, unfavorable an length, but it conducive enhancement strength. Furthermore, accumulated inside outside film limits, amount 0~100 cm followed T3 > T5 T1 T4. Based comprehensive analysis entropy TOPSIS method, findings present suggested FC China.