Chengdou No. 8 (soybean)
The main results are as follows: (1) Variety source: Chengdou No. 8 (original code 8407-1) was bred by the cross between Chengdou No. 4 and (Rongjing) Dou Zi, which was used by Sichuan Academy of Agricultural Sciences.
(2) characteristics: early-maturing spring soybean varieties, can also be planted in summer and autumn, spring sowing growth period of about 105 days, plant height of 40 cm, strong resistance to virus, lodging resistance, white grain weight of about 18 grams, grain protein 44.4%, fat 20.2%.
(3) yield performance: the average yield per mu in the provincial regional test in 1994-1996 was 149.5 kg, which was 26.05% higher than that of the control Gongdou 3. In the production experiment in 1997, the average yield per mu was 143 kg, which was 23.17% higher than that of the control Gongdou No. 3.
(4) cultivation key points: the optimum sowing date is before and after Qingming Festival, and the density is about 16000 plants per mu, 20000 plants per mu in summer sowing, and 3.5-40000 plants per mu before and after the Beginning of Autumn sowing in autumn. Properly prolonging the harvest time in the field can reduce the blighted grain.
(5) suitable planting area: suitable for planting in areas below 1600 meters above sea level in our province, adapting to a wide area.
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Chengdou 9 (soybean)
(1) Variety source: Chengdou 9 was bred by crop Institute of Sichuan Academy of Agricultural Sciences in 1988 with Ajiaozao as female parent and Lei Lian (introduced from Japan) as male parent. (2) characteristics: the plant is about 50 cm tall, the leaves are oval, the flowers are white, the mature pods are brown, the seeds are oval, the seed coat is yellow, the navel is brown, and the weight of 100 seeds is about 21 grams. This variety is an early-maturing spring soybean variety with limited pods, suitable for spring sowing, and can also be planted in summer and autumn.
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Chengdou No. 7 (8601-4) (soybean)
The main results are as follows: (1) Variety source: in 1986, Sichuan Academy of Agricultural Sciences used Bai Qian as the female parent and Chengdu Tiankandou as the male parent. (2) characteristics: this variety is a mid-mature spring soybean variety, and the growth period of spring sowing is about 120 days. Limited podding habits, white flowers, gray hairs. The grain is large (100 grains weigh about 26 grams), nearly round, seed coat yellow, navel yellow. The complete grain rate is high, with a protein content of 43.5% and a fat content of 20%. 7%. High yield, good quality, resistance to mosaic virus, lodging resistance
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