Soybean varieties introduced
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Dandou 8 is a high-yielding soybean variety with a growth period of approximately 125 days. It exhibits limited node formation, produces white flowers, and has a plant height of around 90 cm. The main stem consists of 16 to 18 nodes, with 2 to 4 branches typically developing. The main stem is thick and resistant to lodging, making it suitable for various growing conditions. The grains are yellow with a light umbilicus, and the 100-seed weight averages about 24 grams. The full seed rate reaches up to 96%, with crude fat content at 21.10% and crude protein content at 42.03%, indicating excellent nutritional value.
For cultivation, fine soil preparation and seed selection are essential. Farmers apply 2000 kg of organic manure per mu and 15 kg of diammonium phosphate as base fertilizer. The planting pattern involves a row spacing of 60 cm and a hole spacing of 22 cm, with two plants per hole. Approximately 9000 seedlings are planted per mu. This variety is well-suited for regions such as Dandong, Yingkou, Anshan, Dalian, southern Shenyang, Hebei, Henan, and Yunnan. The average yield is around 160 kg per mu.
Dandou 9 is another notable variety with a slightly longer growth cycle of about 135 days. It also grows to a height of 90 cm, with 17 main stem nodes and 2 to 3 branches. The stalks are strong, and the plant has oval leaves with white flowers and gray hairs. The seeds are round, with yellow seed coats and cotyledons, and a light yellow umbilicus. The 100-seed weight ranges from 20 to 22 grams. This variety is highly productive, with a full seed rate above 96%, and is resistant to aphids and diseases. It contains 42.9% protein and 19.9% fat, making it a premium choice. The yield is generally over 150 kg per mu.
Cultivation practices include careful soil preparation and seed selection. A similar fertilization approach is used: 2000 kg of farmyard manure and 15 kg of diammonium phosphate as base fertilizer. Planting follows a row spacing of 60 cm, with holes spaced 22 cm apart and two plants per hole. This variety thrives in the southern-central areas of Dandong, Dalian, Tangshan in Hebei, Funing, and other similar regions.
Dandou 10 is a mid-late maturing variety with a growth period of about 137 days. It features limited node development, white flowers, and elliptical leaves. The average plant height is 66.5 cm, with 2.9 branches per plant and 15.4 main stem nodes. Each plant yields an average of 40.2 seeds. The full seed rate is 90.4%, with a 100-seed weight of 22.5 grams. Both the seed coat and umbilicus are yellow, and the variety boasts high-quality characteristics, including 43.47% crude protein and 21.13% crude fat. It has a well-developed root system, strong disease resistance, and adaptability to different environments.
For cultivation, seed selection and fine soil preparation are crucial. Organic manure (2000 kg) and diammonium phosphate (15 kg) are applied as base fertilizer. Timely sowing is important, with row spacing of 60 cm and hole spacing between 22 to 27 cm. Two plants are placed per hole, following the principle of dense planting in thin soils and sparse planting in fertile ones. The recommended density is 8000 to 10000 plants per mu. Field management should be strict, with timely weeding and pest control, especially against worms and soybean borers.
This variety is suitable for planting in Dandong, Dalian, Yingkou, Anshan, and provinces like Hebei, Henan, Shaanxi, Shanxi, Gansu, Xinjiang, and Yunnan, particularly in similar latitudes. Its adaptability and high yield make it a popular choice among farmers in these regions.