(1. Hongxinglong Research Institute of Heilongjiang Land Reclamation Bureau ,Youyi 155811;2. Research and Breeding Centre of Heilongjiang Land Reclamation , Haerbin 150036)
Taking 3 high-oil soybean varieties(Suinong 14 , Hongfeng 9 , Dongnong 47)as materials, thechange law of protein and oil accumulation for high-oil soybean varieties was studied in 2002 and 2003. Theresult show that relative order of fat content of high-oil soybean varieties keeps consistently in differentyears, the protein forming is the rising tendency in unfavourable oil forming year , and the protein contentaccumulation has presented the parabola distribution of concave type in favourable oil year , but the proteincontent will be reduction after maturation. The oil accumulation is a balance and drop tendency after flow-ering 70 days in unfavourable oil year due to the characteristics of each soybean variety vary large. The oilaccumulation course of high-oil soybean varieties presents identical tendency in favourable oil forming year,namely , from low in beginning , then to go up step by step, at last to reach a highest value which will keepsteady.