Detailed Introduction to the Soybean Variety Nandou 5

Characteristics: White flowers, brown pubescence, lanceolate leaves, compact plant type, determinate podding habit. Average growth period 109 days, plant height 49.5 cm, 2.3 branches, 100-seed weight 22.4 g. Pods turn brown at maturity. Seeds are oval, with yellow seed coat and brown hilum. Average crude protein content 46.18%, crude fat content 18.71%.

Yield performance: In 2002, it participated in the southern spring soybean group variety regional trial, with an average yield of 146.5 kg per mu, a 5.5% increase over the control Xiangchun 10 (highly significant); in the 2003 continued trial, the average yield was 140.7 kg per mu, a 5.2% decrease compared with the control Xiangchun 10; the two-year regional trial average yield was 146.0 kg per mu, a 1.6% increase over the control Xiangchun 10. In 2003, it participated in the southern spring soybean group variety production trial, with an average yield of 122.0 kg per mu, a 4.8% increase over the control Xiangchun 10.

Key cultivation techniques: 1. Sowing period: spring sowing in the Yangtze River basin in mid to late March; summer sowing in mid to late May, autumn sowing from early to late July. 2. Planting density: for sole cropping in spring and summer, maintain 15,000-17,000 plants per mu. When intercropped with crops such as peanut and sweet potato, maintain 2,000-2,500 plants per mu. 3. Fertilization: apply 20-25 kg of superphosphate and 1,000-1,500 kg of human and livestock manure water per mu as base fertilizer.

Approval opinion: Upon review, this variety meets the national soybean variety approval standards and has passed approval. This variety is a high-protein soybean variety, suitable for spring sowing cultivation in the Sichuan Basin and low mountain and hilly areas, northern Hunan, central and northern Jiangxi, southern Anhui, southern Jiangsu, and the Jianghan Plain of Hubei.