In recent years,Chinese government had bean made strategic adjustments to the planting structure in the Sickle Bay area, in order to reduce corn planting area and increase soybean planting area, especially developing the early maturity soybean production in the north-eastern high-cold area. Scholars had bean done a lot of researches on the agronomic traits,ripening period, and variety breeding of early-season soybeans. The previous studies on the early maturity soybean in significance of the development, ec...