Effect of continuous drought on winter wheat yield in pot planting
LI Daoxi1*, LOU Ruitao1, LI Yanbin1, BIAN Zepeng1, ZHU Yanan2
1. School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450000, China; 2. Changshu River Management Office, Changshu, Jiangsu 215500, China
Abstract：In order to study the effect of continuous drought on winter wheat yield, the winter wheat variety "Aikang 58" was used as the experimental material. Through the pot experiment, mild drought, moderate drought and severe drought were set respectively in the jointing stage, heading stage and filling stage of winter wheat, and the soil moisture content was controlled at 60% to 70%, 50% to 60%, and 40% to 50% of the field water holding capacity, respectively. In the experiment, there were 9 single-stage droughts, 6 two-stage droughts, 4 three-stage droughts, and 1 test control, totaling 20 trials. The results showed that under single drought conditions, the yield reduction was most obvious in the jointing stage, followed by the heading stage; light drought, moderate drought and heavy drought in the jointing stage decreased yield by 4.08%, 21.71% and 36.73%, respectively. Under the two-stage continuous drought condition, the continuous moderate drought in the jointing and heading stages had the greatest impact on the yield, and the yield reduction was 28.42%; the continuous moderate drought in the heading stage and the filling stage had a relatively small impact on the yield. Under the three-stage continuous drought conditions, continuous light drought and reduced yield are not obvious, and continuous moderate drought and severe drought decreased by 24.96% and 53.99%, respectively. In general, the jointing stage is the critical period of water demand for winter wheat. The level of mode-rate drought and above will cause significant reduction of production. On the contrary, under the condition of water shortage, moderate or even severe drought can be applied in the heading and filling stages, which has little effect on the yield.
李道西*,楼睿焘,李彦彬,边泽鹏,朱亚南. 桶栽条件下冬小麦产量的连旱效应[J]. 排灌机械工程学报, 2020, 38(10): 1051-1056.
LI Daoxi*,LOU Ruitao,LI Yanbin,BIAN Zepeng,ZHU Yanan. Effect of continuous drought on winter wheat yield in pot planting. Journal of Drainage and Irrigation Machinery Engin, 2020, 38(10): 1051-1056.
