Evaluation of crop water use efficiency for controlled root
dividing alternate irrigation based on Metaanalysis
1. Western Energy and Environment Research Center, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2. Key Laboratory of Energy Supply System Driven by Biomass and Solar Energy of Gansu Province, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 3. College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China
Abstract：To determine the effects of controlled rootdividing alternate irrigation (CRDI) on crop water use efficiency (WUEC), the test data of CRDI was collected, and the effects of CRDI on WUEC in different regions, climatic conditions, planting conditions, irrigation schemes and crop types were analyzed by Metaanalysis method. The results show that CRDI can increase WUEC by 28.9% in China, and WUEC is increased most significantly by 49.29% in Northwest. In the area where the annual average precipitation is between 200 and 800 mm, CRDI can increase the crop WUEC by 29.92%. However, in the south and the area where the annual average precipitation is greater than 800 mm, the increasing of WUEC is not significant. CRDI significantly increases the WUEC of crops by 36.98% when the average annual temperature is higher than 12 ℃. In the greenhouse, the increasing of WUEC is the most significant by 53.45%. Applying CRDI into flood irrigation, fixed irrigation, furrow irrigation and drip irrigation, the values of WUEC are increased by 37.03%, 21.41%, 16.59% and 32.56%, respectively. CRDI can significantly improve the WUEC of different crops, and it is affected by the physiological growth characteristics of crop and test area.
郑健, 潘占鹏, 颜斐, 冯正江, 马彪. 基于Meta评价控制性分根交替灌溉的作物水分利用效率[J]. 江苏大学学报（自然科学版）, 2019, 40(3): 332-337.
ZHENG Jian, PAN Zhan-Peng, YAN Fei, FENG Zheng-Jiang, MA Biao. Evaluation of crop water use efficiency for controlled root
dividing alternate irrigation based on Metaanalysis[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2019, 40(3): 332-337.
2019, Vol. 40 
