Effects Of Planting Row Direction On Canopy Microenvironment And Yield Of Peanut-cotton Intercropping

This experiment was conducted in Liangcun,Gaotang County,Liaocheng in 2019.The cotton planting date is April 30,the peanut planting date is June 8,the tested cotton variety is Lu Mianyan 37,and the peanut variety is Huayu 36.Set up two modes of north-south-bound peanut-cotton intercropping(NSPC)and east-west-row peanut-cotton intercropping(EWPC),with north-south-bound peanut,cotton single cropping(NSOP,NSOC)and east-western peanut,cotton intercropping(EWOP,EWOC)is a control.The effects of different cropping modes of peanut and cotton intercropping on peanut growth physiological characteristics,canopy microenvironment,yield and benefit were studied.The main findings are as follows:1 Effect of different row directions of peanut and cotton intercropping on peanut physiological traitsThe intercropping mode promotes the vegetative growth of peanuts.Compared with the control,the main stem height,lateral branch length and dry matter accumulation of the two intercropping patterns were significantly increased.Compared with the two intercropping models,the dry matter accumulation of the EWPC model is higher than that of the NSPC,but the difference is not significant;its leaf area index is significantly lower than that of the NSPC,which tends to cause the peanut stem leaves to grow longer.Comparing the different intercropping cropping patterns,the NSOP model and the EWPC model increased the chlorophyll content,photosynthetic parameters and senescence enzyme activity of peanut leaves,and reduced the peanut leaf cells.Ci concentration and malondialdehyde content improve the photosynthetic performance of paeanut leaves and alleviate leaf senescence.The EWPC model is a better planting model.2 Effect of different row directions of peanut and cotton intercropping on canopy microenvironmentAt 40 days after anthesis and 60 days after anthesis,the overall light transmittance,light energy interception and canopy temperature of the EWPC model were higher than the NSPC model,and the canopy humidity was lower than its NSPC mode is conducive to canopy ventilation and light transmission.The EWPC mode is a planting mode with high efficiency of group light energy utilization.3 Effects of different cropping of peanut and cotton on soil nutrientsIntercropping in different directions significantly increased soil organic matter and total nitrogen content.The soil organic matter and total nitrogen content of the EWPC model is significantly higher than that of other soils.The EWPC model can effectively improve the soil nutrient content,which is a better mode of intercropping.4 The impact of different row directions of peanut and cotton intercropping on yield and its comprehensive benefitsAlthough different intercropping patterns reduced the output of peanuts and cotton,the total economic output value increased compared to its single cropping.The peanut pod yield,kernel yield and seed cotton yield of the EWPC model are higher than that of the NSPC model,and the total economic output value of the EWPC model is significantly higher than that of the NSPC model,and LER is greater than 1,has obvious advantages of intercropping.In summary,the EWPC 6:2 model is the optimal intercropping model to ensure the overall benefit.