[Study on the ecological regions of soybean in China. II. Ecological environment and representative varieties].

Based on the climatic and geographical condition, cropping system and season sowing types and maturity group (MG) types of 256 varieties in test from total cultivating regions of soybean in China, six ecological regions of soybean were suggested. Those are: Northern single cropping, spring planting eco-region(I), Huanghuaihai double cropping, spring and summer planting eco-region(II), Middle and lower Changjiang valley double cropping, spring and summer planting eco-region(III), Central south multiple cropping, spring, summer and autumn planting eco-region(IV), Southwest plateau double cropping, spring and summer planting eco-region(V), and South China tropical multiple cropping, all season planting eco-region(VI). The cultivating environmental condition and representative varieties were shown, and the characteristics of all ecological regions of soybean in China were also discussed in this paper.