Effect of different intercropping models for spring maize and summer soybean on soybean production

[Objective]The present study was conducted to investigate the effect of different intercropping models for spring maize and summer soybean on the yield of summer soybean, and provide scientific references for rationally intercropping on them. [Method]Using Guixia 1 (summer soybean) and Zhengda 619 (maize) as test materials, the experiment was carried out to screen suitable planting models of spring maize intercropping with summer soybean at late stage in three typical summer soybean production areas in 2011. [Result]Soybean grown on the ridge with two lines got the highest average yield of 2754.87 kg/ha., followed by that grown in furrow with single line (2466.57 kg/ha), the lowest average yield of soybean was 2160.70 kg/ha when grown on the ridge with two alternate lines with maize. There was significant difference in soybean yield between the model of growing soybean two lines on ridge and other models. [Conclusion]It was concluded that intercropping summer soybean two lines on ridge in late growing period of spring maize was an optimal planting mode in agricultural production.