Optimal Irrigation Levels Can Improve Maize Growth, Yield, and Water Use Efficiency under Drip Irrigation in Northwest China

Drip irrigation systems are becoming more and mature, presently extensively applied to increase crop yield water use efficiency. In order investigate the effects of quota on maize growth, grain yield, efficiency (WUE), a field experiment with four quotas (T1 420 mm, T2 480 T3 540 T4 600 mm) was conducted from 2013 2021 in Xinjiang, China. The results showed significant changes WUE response different quotas. plant height, leaf area index, soil analyzer development (SPAD), dry matter accumulation, harvest index at all ‘single peak curve’, its change closely related level. growth were highest. transfer efficiency, contribution translocation grain, 13.86%, 26.06%, 29.93%, 7.62% compared T1, respectively. comparison T2, T4, increased by 32.17%, 13.54%, 11.27%, respectively, 16.56%, 6.49%, 23.70%, correlations established between could be simulated Kuznets-style relation. negatively correlated When (x) 539.12 (y) 16043.92 kg·hm?2. These demonstrate that optimized (540 can effectively improve drip northwest Meanwhile, it provide theoretical reference data support for optimal amount Xinjiang