Effects of Peanut and Cotton Intercropping on Field Microclimate Characteristics and Crop Yield

Wang Jie; Tian Shufei; Zou Xiaoxia; Zhang Xiaojun; Yu Xiaona; Si Tong

doi:10.14083/j.issn.1001-4942.2025.11.005

Abstract：To investigate the theoretical basis for increasing yield of intercropped peanut and cotton,this study analyzed the field microclimate characteristics and yield of the peanut-cotton intercropping system in three regions of Shandong Province,namely Qingdao,Dongying and Liaocheng.The results showed that in the peanut-cotton intercropping system,the peanut plant height increased,while the number of main stem nodes,dry matter weight of stems and leaves and yield of peanut decreased,and the closer the peanut row was to cot-ton,the more significant impacts the peanut plants suffered;the cotton plant height decreased,while the dry matter weight of stems and leaves and yield of cotton increased,and the closer the cotton row was to peanut,the stronger promoting effect the cotton plants received.Intercropping reduced the photosynthetically active ra-diation(PAR),in-canopy air and soil temperatures of peanut,while increased the in-canopy air humidity,and the closer the peanut were to cotton,the greater the impacts were;in contrast,intercropping increased the PAR,in-canopy air and soil temperatures of cotton,while decreased the in-canopy air humidity,and the clos-er the cotton was to peanut,the more obvious the effects were.Correlation analysis results indicated that pea-nut yield was significantly positively correlated with PAR and significantly negatively correlated with plant height,while cotton yield was extremely significantly positively correlated with PAR and significantly positively correlated with air temperature,which suggested that PAR and air temperature were the main factors affecting the yield of peanut-cotton intercropping system.