Using irrigation intervals to optimize water-use efficiency and maize yield in Xinjiang, northwest China

Guoqiang Zhang, Dongping Shen, Bo Ming, Ruizhi Xie, Xiuliang Jin, Chaowei Liu, Peng Hou, Jun Xue, Jianglu Chen, Wanxu Zhang, Wanmao Liu, Keru Wang (+1 others)
2019 Crop Journal  
et al.. Using irrigation intervals to optimize water-use efficiency and maize yield in Xinjiang, northwest China. Worldwide, scarce water resources and substantial food demands require efficient water use and high yield. This study investigated whether irrigation frequency can be used to adjust soil moisture to increase grain yield and water use efficiency (WUE) of high-yield maize under conditions of mulching and drip irrigation. A field experiment was conducted using three irrigation
more » ... in 2016: 6, 9, and 12 days (labeled D6, D9, and D12) and five irrigation intervals in 2017: 3, 6, 9, 12, and 15 days (D3, D6, D9, D12, and D15). In Xinjiang, an optimal irrigation quota is 540 mm for high-yield maize. The D3, D6, D9, D12, and D15 irrigation intervals gave grain yields 2.08 kg m −3 , respectively. Treatment D6 led to the highest soil water storage, but evapotranspiration and soil-water evaporation were lower than other treatments. These results show that irrigation interval D6 can help maintain a favorable soil-moisture environment in the upper-60-cm soil layer, reduce soilwater evaporation and evapotranspiration, and produce the highest yield and WUE. In this arid region and in other regions with similar soil and climate conditions, a similar irrigation interval would thus be beneficial for adjusting soil moisture to increase maize yield and WUE under conditions of mulching and drip irrigation.
doi:10.1016/j.cj.2018.10.008 fatcat:y4cvqrpolrd6vgbuur5if4bfcy