Effect of mulched drip irrigation on water and heat transfer and crop water consumption in maize field
QI Mingdi1,2, ZHANG Yanqun3, WANG Weijie1,3, WANG Chuanjuan3, WU Zhongdong1*, WANG Jiandong3
1. School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong 255049, China; 2. Fenhe First Dam Administration Bureau of Shanxi Province, Taiyuan, Shanxi 030001, China; 3. Department of Irrigation and Drainage, China Institute of Water Resources and Hydropower Research, Beijing 100048, China
Abstract：Based on sufficient drip irrigation conditions, a quantitative analysis of differences of solar net radiation, soil heat flux, soil temperature and crop water consumption with film mulching and without film mulching was carried out in maize farmland in a northeastern typical region. Results show that film mulching makes the net radiation peak time lagged by about 1 hour on sunny days, and the soil heat flux can provide more energy for maize growth in film mulching on cloudy days. Throughout the whole growth period, the average net radiation flux received by the canopy is 133.25 W/m2 with film mulching compared to 135.42 W/m2 without film mulching. The available energy received by crops with film mulching is lower than that without film mulching. But in the middle and late growth stages, the net radiation flux in the former is increased by 2%. During the whole growth period, the average soil temperature and soil accumulated temperature in 0-80 cm soil layer with film mulching are increased by 1.13 ℃ and 149.68 ℃, respectively. In addition, the crop water consumption with film mulching is significantly lower than that without film mulching in the early and late growth stages, and the seasonal crop water consumption and crop coefficient(Kc)with film mulching are considerably reduced by 10.21% and 7.42%, respectively.
祁鸣笛,张彦群,王卫杰,王传娟,吴忠东*,王建东. 覆膜滴灌对玉米田间水热传输及耗水的影响[J]. 排灌机械工程学报, 2020, 38(7): 731-737.
QI Mingdi,ZHANG Yanqun,WANG Weijie,WANG Chuanjuan,WU Zhongdong*,WANG Jiandong. Effect of mulched drip irrigation on water and heat transfer and crop water consumption in maize field. Journal of Drainage and Irrigation Machinery Engin, 2020, 38(7): 731-737.
