| In order to extend water-saving irrigation for guar cultivation in Xinjiang, four water deficient treatments, W0 (extreme water deficiency, total irrigation amount was 450 m3·hm-2), W1（heavy water deficiency, total irrigation amount was 1 530 m3·hm-2), W2 (light water deficiency, total irrigation amount was 1 890 m3·hm-2), and W3 (full irrigation, 2 250 m3·hm-2)were conducted, in combination with plastic mulching and drip irrigation. Some growth parameters and physiological traits such as kernel weight, yield, and soluble sugar were analyzed. The results indicated
significant effect of W2. Before the pod setting stage, high values of height and stem diameters were observed with W2. Contents of soluble sugar, soluble protein and proline increased for W2 and W3, while malonaldehyde content decreased. Regarding physiological traits such as chlorophyll, soluble protein, and POD activity, W2 is recommended as the suitable practice for guar production in Xinjiang
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