Effect of intercropping configuration on sudangrasswild soybean intercropping performance

The objectives of this study were to determine effects of intercropping configuration and sowing rate of sudangrass （Sorghum sudanense） on sudangrasswild soybean （Glysine soja） intercropping performance. The results were as follows: The effects of intercropping configuration on dry matter yields of sudangrass, wild soybean and intercrop components were significant, and showed as single row intercropping＞double rows intercopping＞four rows intercopping. The land equivalent ratio (LER) of intercrops components ranged from 1.02 to 1.19 on a dry matter yield basis and from 1.05 to 1.32 on a protein yield basis under different intercropping configuration, indicating a production advantage of intercropping. The LER of sudangrass in intercropping ranged from 0.54 to 0.66 on a dry matter yield basis and from 0.55 to 0.82 on a protein yield basis, the LER of wild soybean in intercropping ranged from 0.48 to 0.53 on a dry matter yield basis and from 0.36 to 0.49 on a protein yield basis, indicating a growth advantage of sudangrass over wild soybean in intercropping. The dry matter yields and LER on a dry matter yield of sudangrass and intercropping combined forage yields were increased with sowing rate of sudangrass increased, but the dry matter yields and LER on a dry matter yield of wild soybean were decreased. At the same time, with increasing the sudangrass sowing rate, CP concentration and LER on a protein yield of sudangrass, wild soybean and combined forage were all increased.