Dongxin No. 3 (soybean)

I. Approval number

Su Shen Dou 200601

II. Origin and type of varieties

Dongxin 2002 was bred by Lianyungang Agricultural Science Research Institute of Jiangsu Province with A95-10/Sidou 11 hybrid in 2001.

III. Scope of adaptation

Suitable for summer soybean cultivation in Huaibei area of Jiangsu Province.

IV. Yield level and characteristics

2003-2004 In 1996, the regional test of summer soybean in Huaibei, Jiangsu Province was carried out. The average yield per mu in two years was 179.0 kg, which was 7.6% higher than that of the control. In 2005, Huaibei summer soybean production experiment was conducted, with an average yield of 172.2 kg/mu, 8.5% higher than that of CK. The growth period is 109 days, the plant height is 78.5 cm, the branches are 2.0, the main stem nodes are 15.2, the pod number per plant is 29.8, the seed number per pod is 1.9, and the 100-seed weight is 28.6 g.

Subfinite podding habit, white flowers, brown hairs, leaf blade ovoid. Seeds oval, seed coat yellow, light luster, hilum light black, large seeds, good commodity. When mature, the leaves are smooth and the pods are not split. The occurrence of mosaic virus disease in the field was light and the lodging resistance was good. Inoculation identification of highly susceptible mosaic virus disease, disease index 67. The quality was determined by Soybean Institute of Nanjing Agricultural University and Food Quality Safety and Inspection Research Center of Jiangsu Province Academy of Agricultural Sciences. The average protein content was 38.7%, fat content was 21.9%.

V. Key points of cultivation techniques

1. Rotation. Select the first two crops without planting beans in the field plot planting.

2. Sowing time. The seeds can be sown from the end of May to the end of June, with a seeding rate of about 7 kg per mu.

3. Cultivation density. About 15,000 seedlings per mu shall be sown before the first ten days of June, and 18,000 - 20,000 seedlings per mu shall be sown in the middle and late June.

4. Fertilizer and water management. Before sowing, apply 5kg ammonium phosphate per mu, 3kg pure nitrogen per mu for weak growing fields in full bloom, and 2.5kg pure nitrogen per mu for vigorous growing fields in final bloom. In case of drought in flowering and pod stage, irrigation should be timely and drought resistant.

5. Chemical regulation. Medium fertility and high-yield cultivation field, in the early flowering stage should be based on climate and growth chemical regulation, generally with 15% paclobutrazol 20-40 grams per mu, mixed with water 30-50 kg, uniform spray.

6. Prevention and control of pests and weeds. Before sowing, soil pesticides are mixed with poisonous soil and turned over to control underground pests. After sowing, herbicide should be sprayed before emergence to control weeds and diseases and insect pests in time.