Study On Responses Of Photosynthetic Characteristics And Yield Of Different Maize Soybean Varieties To Intercropping Patterns

The intercropping of maize and beans is of great significance to improve the grain yield per unit area.Different intercropping configurations directly affect the environmental conditions and photosynthetic characteristics of the intercropping crops,thereby affecting their yield.The intercropping adaptability of different crop varieties is different,and the photosynthetic performance and yield performance are different.In this experiment,the corn variety Fengdan 189∥ soybean Changnong 30 was intercropped with three modes of 2:3,3:3,4:3,and the corn variety Denghai 618∥soybean Changnong 30 was intercropped with 4:3,4:6 two modes of intercropping,maize variety Fumin 22∥soybean variety Changnong 30 were intercropped in 2:3 and 4:3 modes.The field environment and photosynthetic performance changes of corn and soybean under different intercropping modes were studied.The differences in photosynthetic performance between corn and soybean products are expected to provide theoretical basis and practical guidance for reasonable intercropping of corn and soybean.The main findings are as follows:1.Among the different intercropping modes of maize and soybean,the 4:3 intercropping mode has the highest field humidity,maize population temperature,leaf SPAD value,leaf area per plant,leaf area index,photosynthetic potential,leaf photosynthetic rate,transpiration rate,net assimilation rate are higher than other modes.The dry matter mass per plant of maize finally reached 292.81~327.23 g/plant,and the yield reached 627.84~728.32 kg/hm2.The photosynthetic performance indicators of soybean are good,this model shows good intercropping performance as a whole.The light intensity and light transmittance of the maize population in the 2:3 and 4:6 models are better,and the field temperature and leaf SPAD value of the soybean population are better,leaf area per plant,leaf area index,photosynthetic potential,photosynthetic rate,transpiration rate,net assimilation rate of soybean perform better than other modes.The dry matter mass per plant of soybean is 52.12~57.06 g/plant,and the yield is 69.20~91.84 kg/hm2.The overall intercropping production performance is average.The total yield of different intercropping modes was 4:3 mode > 2:3 mode > 3:3 mode.2.Under the same intercropping mode of different corn and soybean varieties,the photosynthetic conditions of the corn variety Fumin 228,such as light intensity,light transmittance,temperature,humidity and other photosynthetic conditions,as well as leaf SPAD value,leaf area per plant,leaf area index,photosynthetic potential,photosynthetic rate,The photosynthetic performance indicators such as transpiration rate,net assimilation rate and dry matter mass per plant all performed well,showing good intercropping adaptability;the photosynthetic conditions such as group light intensity and light transmittance of soybean variety J13122,leaf SPAD value,single plant Leaf area,leaf area index,photosynthetic potential,photosynthetic rate,transpiration rate,net assimilation rate,dry matter mass per plant and other photosynthetic performance indicators are outstanding,suitable for intercropping.The yield of different corn varieties was Fumin 228> Fengdan 189> Denghai 618,and the yield of different soybean varieties was J13122> Zhonghuang 35> Changnong 30.Combining the group environment,photosynthetic performance indicators and intercropping group yield of various intercropping modes,the field environmental characteristics and photosynthetic performance of the 4:3 mode performed well,and the intercropping yield was the highest.Under the same intercropping mode,the intercropping adaptability of corn variety Fumin 228 and soybean variety J13122 was better.In this experiment,corn Fumin 228 and soybean J13122 were intercropped in a 4:3 mode,and the intercropping group environment,photosynthetic characteristics were the best,and the yield was the highest,which was suitable for local application.