Effects of Irrigation Methods on Crop Yield and Water-Nitrogen Use Efficiency under Wheat-Peanut Rotation System

GAO Cuimin; TIAN Yuan; ZHANG Ruiqing; HE Fang; HAN Weifeng; ZHANG Yunhong; PAN Xiaoying; YANG Yonghui

doi:10.15933/j.cnki.1004-3268.2025.03.004

Abstract：Based on a four-year field positioning experiment,three irrigation methods,including traditional irrigation(TI),sprinkler irrigation(SI)and drip irrigation(DI)were used to explore the effects of irrigation methods on crop photosynthetic characteristics,grain yield and water-nitrogen use efficiency under wheat-peanut rotation system,with no irrigation treatment as control(CK),so as to provide a theoretical basis for promoting the popularization and application of water-saving irrigation technology in wheat-peanut rotation system.The results showed that irrigation methods had significant effects on crop SPAD value,net photosynthetic rate,transpiration rate,yield and its components,water and nitrogen use efficiency under wheat-peanut rotation system,and DI treatment was the highest among all treatments,followed by SI treatment.Under wheat-peanut rotation system,compared with other treatments,net photosynthetic rate,transpiration rate and SPAD value of DI treatment increased by 3.3％—105.4％,5.6％—109.6％and 1.0％—19.4％,respectively;Grain number per spike,1 000-grain weight and grain yield of wheat increased by 6.9％—21.1％,4.6％—39.2％and 9.2％—50.6％,respectively;Number of full pods per plant,100-pod weight,kernel rate and yield of peanut increased by 8.8％—35.5％,2.8％—16.2％,1.7％—5.6％and 4.1％—30.1％,respectively.The annual grain yield,water use efficiency and partial factor productivity of nitrogen of wheat-peanut showed DI＞SI＞TI.Compared with TI treatment,the total yield,water use efficiency and partial factor productivity of nitrogen of wheat-peanut of DI treatment increased by 17.9％,19.5％and 17.9％,respectively,and those of SI treatment increased by 10.1％,14.9％and 10.1％,respectively.In summary,under the condition of this study,drip irrigation is the best irrigation method for increasing yield and efficiency of wheat-peanut,followed by sprinkler irrigation,both of which can achieve the goal of high yield and water and nitrogen use efficiency.