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【Objective】 Drip irrigation combined with fertilization has become a standard practice in grape production in Xinjiang, China. The purpose of this paper is to study the effect of different combinations of irrigation and fertigation on growth and fruit yield and quality of grape. 【Method】 The experiment conducted in a vineyard; it compared three irrigation amounts: 10 950 m3/hm2 (W1), 9 150 m3/hm2 (W2) and 7 800 m3/hm2 (W3), and three fertilizations: 750 kg/hm2 (N1), 450 kg/hm2 (N2) and 300 kg/hm2 (N3). Each treatment had three replicas arranged randomly in the field. In each treatment, we measured the growth, traits of fruit yield and quality. 【Result】 Rational combination of irrigation and fertilization improved fruit appearance, 100-fruit weight, and fruit yield and quality. Among all treatments, W2+N2 was optimal in improving fruit appearance, 100-grain weight, fruit yield, soluble solids and hardness of the grape, but less than W2+N3 in increasing the solid-acid ratio in the grape despite the insignificant difference between them. W1+N1 was most effective in increasing vitamin C, and the difference from other treatments was significant. 【Conclusion】 Experimental data obtained from all treatments showed that irrigating the grape by 9 150 m3/hm2 of water combined with 450 kg/hm2 of nitrogen fertilization was optimal. Further analysis of the experimental data using the binary quadratic regression optimization model showed that the optimal fertigation can be further fine-tuned to irrigation amount of 9 723 m3/hm2 and fertilization of 557 kg/hm2, which increases the fruit yield to 38 636.53 kg/hm2.

[Objective] The irrigation system suitable for the cultivation of Lycium barbarum in Northern Xinjiang Uygur Autonomous Region was studied to provide a scientific basis for the future irrigation of L. barbarum in this area. [Methods] The plant height, stem thickness, crown width, water consumption, and yield of L. barbarum were monitored, and the effects of different irrigation amounts and irrigation frequencies on the growth and yield of drip-irrigated L. barbarum were analyzed. [Results] ① Plant height of drip-irrigated L. barbarum increased with increasing irrigation amount annually. ② Annual net growth of drip-irrigated L. barbarum stem thickness increased with increasing irrigation amount. When the irrigation amount increased to a certain value, the increase in stem thickness decreased. ③ The water consumption intensity of drip-irrigated L. barbarum in each growth period followed the order of fruiting stage>bloom stage>spring shoot growth stage>autumn shoot growth stage> leaf opening stage. The relationship between water consumption and yield and between water consumption and water use efficiency (WUE) of drip-irrigated L. barbarum followed a quadratic parabolic relationship. ④ When water consumption increased from 583 mm to 676 mm, yield of drip-irrigated L. barbarum increased from 12 703.5 kg/hm2 to 14 200.5 kg/hm2. At the same time, WUE of drip-irrigated L. barbarum dereased from 1.45 kg/mm to 1.46 kg/mm, it did not decrease significantly. [Conclusion] In order to save water and produce high yields, we recommend drip-irrigated L. barbarum grown in the study area be provided with 5 700 m3/hm2 of irrigation water over the entire growing season, applied as 10 irrigations of 570 mm during each application. The 10 irrigations should be applied as one irrigation during the leaf opening stage, two irrigations during the spring shoot growth stage, one irrigation during the bloom stage, four irrigations during the fruiting stage, and two irrigations during the autumn shoot growth stage.

【Objective】 In order to explore the management mode of water, fertilizer and salt under mulched saline water drip irrigation in southern Xinjiang. 【Method】 Freshwater and saline water were mixed at volumetric ratio of 1∶0, 4∶1 and 2∶3, respectively, for irrigation. For each irrigation treatment, there were three nitrogen applications: 400 kg/hm2 (over applied), 300 kg/hm2 (used by local farmers) and 200 kg/hm2. Freshwater irrigation combined with 300 kg/hm2 of N fertilization was taken as the control. During the experiment, we measured the uptake of ions and nutrients by the crop, as well as dry matter distribution and accumulation 【Result】 With the increase in irrigation water salinity, the amounts of ions (Na+, Cl- and Ca2+) taken up by the cotton increased, especially Na+ and Cl- . Most of these ions were found in leaves, followed by stems. Increasing irrigation water salinity reduced the uptake of N, P and K, while increasing nitrogen fertilization promoted dry matter accumulation in the roots and uptake of nutrients and ions, thereby boosting plant growth. It was found that increasing nitrogen fertilization enhanced absorption of Na+ and Cl- by the cotton. A moderate accumulation of Na+ and Cl- in stems and leaves associated with 4∶1 of freshwater and saline water suppressed vegetative growth and distributed more nutrients to the buds and bolls, thereby leading to a yield increase. However, over-adsorption of Na+ and Cl- by the crop due to the increase in portion of the saline water could inhibit nutrient uptake and its translocation to the reproductive organs, leading to a yield reduction. Compared with CK, mixing freshwater and saline water at 4∶1 ratio combined with high nitrogen fertilization increased dry matter accumulation by 1.5% without compromising yield (6 829.80 kg/hm2). 【Conclusion】 Mixing freshwater and saline water at 4∶1 combined with an increase in nitrogen fertilization can promote uptake of ions and nutrients by the crop, as well as translation of dry matter to reproductive organs, without compromising cotton yield. It can thus be used as a guidance for cotton production in southern Xinjiang, China.