Huachun 1 was bred by South China Agricultural University and passed the national examination in 2006, with the approval number: National Examination Bean 2006025. Variety source: Guizao 1 No× Brazil 1 1. The average growth period of this variety is 1 14 days, which belongs to late-maturing spring soybean variety. The average plant height is 69.2 cm, the number of effective branches is 3.4, the number of effective pods per plant is 42.7, the number of grains per plant is 89.5, the number of grains per plant15.3g, and the number of hundred grains18.9g.. Plant types are similar, with purple flowers, brown hair and limited pod-setting habits. The seed is oval, the seed coat is yellow and the umbilical color is light brown. After inoculation and identification, the strains of soybean mosaic virus SC3, SC8, SC 1 1 and SC 13 were highly susceptible. The average crude protein content is 42.2 1%, and the crude fat content is 2 1.24%. In 2004, we participated in the regional test of spring soybean varieties in tropical and subtropical areas, and the average yield was 667m2 172.8kg, which was 6.0% higher than that of the control Liudou 1. In 2005, the average yield of 667 m 2 was 164.5 kg, which was significantly higher than that of the control 16. 1%. The average yield of regional trials in two years was 168.6 kg, which was 10.7% higher than the control. In the production test in 2005, the average yield of 667 m2 was 177.0 kg, which was 6.8% higher than that of the control. Key points of cultivation techniques: sow from mid-February to early March, and protect 6.5438+0.3 million seedlings every 667 meters; Apply organic fertilizer 1000kg, ternary compound fertilizer 10 ~ 15kg and urea 5 ~ 7kg every 667㎡. This variety is suitable for spring sowing in central and southern Guangdong, southern Fujian and Hainan.