Nannong 88-31 (soybean)

Nannong 88-31 was bred by soybean research institute of Nanjing Agricultural University using Suxie 1 as female parent and 7303-11-4-1 as male parent by mixed pedigree.

Characteristics Nannong 88-31 yellow seed coat, round grain, glossy, seed coat does not burst, brown navel, 100 seeds weigh about 20 grams. There are about 3 branches, the plant type converges and the plant height is 110 cm. There are 40-50 pods per plant, three or four pods account for 35%, the main stem is about 22 nodes, the pod height is 22 cm, and the pod-bearing habit is sublimited. Purple flowers, brown hair, oval leaves, good defoliation, more resistant to lodging, mature without splitting pods. Generally sowing in the middle and late June, flowering in early August, maturing in the early and middle of October, the whole growth period is about 118 days, which is a mid-mature summer soybean variety. Identified by the Institute of Plant Protection of Jiangsu Academy of Agricultural Sciences, Nannong 88-31 field mosaic virus is generally 0 grade 1, indoor artificial inoculation of Jiangsu epidemic virulent strain Sa, the incidence is 0, is a highly resistant variety. Downy mildew was grade 1 in the field and grade 2 under indoor artificial inoculation, which was moderately resistant. The field investigation of bacterial spot disease was grade 0, and the indoor artificial inoculation was grade 1, which belonged to high resistance. In the case of artificial stocking of the main leaf-eating pests in the south, Dabaoqiao, bean leaf roller and diagonal night, the leaf damage rate of Nannong 88-31 was 23%, while that of the control variety was 36%, which was moderately insect-resistant. After entering the appraisal nursery in 1990, the average yield per mu of the plot was 167.8 kg, which was 39.4% higher than that of the control variety Huaidou No.2 at that time. According to the yield appraisal in 1993, the yield per mu was 182.8 kg, which was 17.2% higher than that of the control Huaidou No.2. In 1994, he participated in the multi-point identification of summer soybean in Huainan, Jiangsu Province. The yield per mu was 138kg, which was 29.21% higher than that of Huaidou No.2. For 3 years, the yield per mu ranked first among the tested varieties, and the average yield per mu in the regional test was 172.99 kg, which was 10.3% higher than that of the control Nannong 88-48. In the summer soybean production experiment from 1997 to 1998, the average yield per mu in two years was 161.4 kg, which was 4.96% higher than that of the control Nannong 88-48. In the high yield experiment in 1997, the yield per mu reached 211.9 kg, with a maximum of 230kg. From the point of view of its popularization in Jiangsu, Anhui and Shanghai since 1997, this variety generally produces about 160 kg per mu and has 230 kg production potential.

This variety is a high-quality summer soybean variety with high fat content, high yield of dried tofu and high yield of dried soybean milk. The fat content is 21.7%, the protein content is 40.13% and 41.50%, and Nannong 88-31 gets 73.59 grams of dried soybean milk per 100 grams of dried beans, exceeding 5.1% of the control. The yield of dried tofu was 53.8%, exceeding 5.6% of the control.

Nannong 88-31 began to be demonstrated in production in 1997, and its variety coverage is in Jiangsu Province and some cities and counties in Huainan, Anhui Province. By 1999, it had been extended to a total of 448400 mu.

Breeders Soybean Research Institute of Nanjing Agricultural University

Region and technology this variety is suitable for summer soybean planting in Jiangsu, south of Huaihe River in Anhui and Chongming Island in Shanghai.

Cultivation rules:

1. The sowing time is in the middle and late June. Before sowing, it is required to select seeds and remove broken grains and impurities. According to the soil type and water condition, the soil moisture is suitable for sowing, and the whole seedling can be irrigated in case of drought, so as to produce the whole seedling at once. Generally, the amount of seed per mu is 6: 8 kg, which can be sowed manually or by machine. The row spacing is generally 40-50 cm, and the plant spacing is 10-13 cm. There are 1.2 to 1.5 seedlings per mu. If there is a shortage of seedlings, it is necessary to replant or transfer seedlings in time. The whole seedling is the basis of high yield. Early sowing, fertile land can be moderately sparse sowing.

two。 Fertilization soybean nodule nitrogen fixation, fertilization should not be too much, before sowing can apply a small amount of nitrogen, phosphorus, potassium compound fertilizer 20: 30kg per mu. At flowering stage, a small amount of urea can be applied according to the growth.

3. Integrated control of land tigers in the south seriously harms seedlings, and 1.5 kg of carbofuran can be applied per mu before cultivated land to control underground pests. During the growth period, attention should be paid to the use of pesticides to control leaf-eating pests. Nannong 88-31 has comprehensive resistance to common diseases and generally does not need special disease control measures. The seedling stage should be ploughed regularly to loosen the soil and prevent soil consolidation, herbicides can be used to control weeds in the seedling stage, the anti-waterlogging ability of soybean in the seedling stage is poor, and the seedling stage is the rainy season in the south, so special attention should be paid to drainage and irrigation. In case of heavy rain, drainage and waterlogging should be discharged in time to prevent the death of seedlings. Before the fortress was closed, the fortress was rooted in soil to loosen the soil, weed and prevent lodging.

4. In the later stage, due to the high plant type, attention should be paid to the prevention and control of lodging under the condition of sufficient fertilizer and water, and paclobutrazol can be sprayed to control the height when the growth is too prosperous. After maturing in the middle of October, it should be harvested and threshed in time to control grain mildew caused by autumn rain in the south.