Introduction to the Characteristics and Traits of the Jidou 11 Soybean Variety

Jidou 11 (Cang 8110-251) was developed by the Cangzhou Academy of Agriculture and Forestry Sciences of Hebei Province in 1981 through sexual hybridization using B99 as the female parent and Qihuang 1 as the male parent, selected and bred by the pedigree method.

Characteristics and traits: This variety grows upright, with a plant height of 60-70 cm, 12-14 nodes on the main stem, 3 effective branches, and a compact plant shape. Internodes are short, pod set is dense, and leaves are ovate and medium-sized. White flowers, gray pubescence, determinate pod-setting habit, 30-35 effective pods per plant, with an average of 2.2 seeds per pod. Seeds are oval, yellow, with a slightly glossy seed coat, yellow hilum, no purple-brown mottling, low insect damage rate, and 100-seed weight of 18-20 g. Protein content is 41.7%, and oil content is 20.1%. The growth period is 85-90 days, making it an early-maturing summer-sown variety, with moderate disease resistance and relatively good tolerance to drought and poor soil. Its outstanding features are: early maturity, short stature and lodging resistance, dense pod set, and high and stable yield.

From 1987 to 1988, it participated in new line identification trials, with an average yield of 164.1 kg per mu over two years, an increase of 11.6% over the control Jidou 6. In 1989, it participated in yield comparison trials, with a yield of 201.3 kg per mu, an increase of 18.7% over the control Jidou 6. From 1990 to 1991, it participated in the Hebei Province summer soybean regional trial, with an average yield of 148.3 kg per mu over 14 site-times in two years, an increase of 17.8% over the control Jidou 6, ranking first among 9 tested varieties. In 1991, it participated in the Hebei Province summer soybean production demonstration trial, with an average yield of 125.1 kg per mu across 5 trial sites, a decrease of 1.8% compared with the control Jidou 6. In the same year, a large-area demonstration field at Hebei Xinhe Farm yielded 164.5 kg per mu, an increase of 20.3% over the control Jidou 6. In 1992, Cangzhou Prefecture suffered severe drought, and the average summer-sown yield in Haixing County of this prefecture was 182.0 kg per mu.

Breeder: Cangzhou Academy of Agriculture and Forestry Sciences of Hebei Province

Region and techniques: Jidou 11 is suitable for summer sowing in central and southern Hebei Province, northern Shandong Province, Tianjin, Beijing, and other areas. 1. Prepare the land finely to ensure sowing quality and achieve full emergence in one sowing. 2. Sow early at the proper time, generally before June 25; in special years when sowing is delayed to the end of June or early July, a relatively good harvest can still be obtained. 3. Carry out manual thinning of seedlings; on fertile soil, leave 15,000-17,000 plants per mu, and on medium or lower fertility soil, leave 17,000-20,000 plants per mu; either 50 x 30 cm wide-narrow row planting or 40 cm equal-row planting may be used. 4. It is best to apply 1,250-1,500 kg of farmyard manure per mu as base fertilizer before sowing, apply 5 kg of compound fertilizer per mu in the furrow as seed fertilizer at sowing, topdress 10-15 kg of compound fertilizer per mu at the early flowering stage, and foliar spraying of micronutrient fertilizer as appropriate from flowering to the seed-filling stage gives better results. 5. From flowering and pod setting to the seed-filling stage, if drought is severe, irrigate promptly; if there is excessive rain during this period, be sure to drain promptly to prevent waterlogging damage. 6. Carry out routine field management throughout the entire growth period.