Improved Soybean Variety-Guixia No.2

Variety approval No.: Guiyindou 2004003

Breeding unit: corn Research Institute of Guangxi Zhuang Autonomous region

Variety source: Guangxi farm variety "Fusui soybean" as female parent, "Gui 190" (Pingguodou × Qingren bird) as male parent, was bred by sexual hybridization.

Applicant: Guangxi Zhuang Autonomous region Corn Research Institute

Characteristics: this variety is an early-maturing summer soybean variety with a growth period of about 96 days. Limited podding habits, purple flowers, brown hairs, large leaves, ovoid. Plant height 55-65cm, main stem nodes 13-18 nodes, branches 2.5, pods 47.0 per plant, seeds per plant 82.0, grain weight per plant 12.6 g, complete grain rate 93.0%, 100-grain weight 16.5g, medium to large. The pods are yellowish brown, the seeds are oval yellow and glossy, the grains are big and full, the size is uniform, the navel is light brown, and the appearance quality is good. The protein content is 45.91% and the fat content is 18.82%. The plant has strong stalk, fertilizer resistance and lodging resistance, plant type convergence, green branches at maturity, good defoliation, non-cracking pods, resistance to downy mildew, rust, etc., and is more resistant to leaf-eating pests and bean flies.

Yield performance: participated in the summer soybean experiment in the autonomous region from 2000 to 2002, the average yield per mu of three crops in three years was 137.4kg, which was 5.4% higher than that of the control variety Guixia 1.

The main points of cultivation techniques are as follows: (1) fine soil preparation and application of sufficient basal fertilizer. It is required that deep ploughing, raking, raking and leveling, and mixed application of basic fertilizer 500kg and 25kg calcium magnesium phosphate fertilizer in the sowing ditch. (2) sowing at the right time: the suitable sowing time is from mid-May to early July. (3) reasonable close planting: the fertile land should be sparse, the thin land should be dense, the pure seed density per mu should be 1.3-20000 plants, and the interplanting should be about 15000 plants. (4) planting mode and specification: it is best to adopt the method of on-demand sowing, generally, the row spacing is about 50cm, the hole spacing is 15-20cm, sowing 3-4 grains per hole, and leaving 2 plants in each hole after emergence. (5) time seedling replenishment and fixed seedling: seedlings can emerge 3-5 days after sowing. When bean seedlings grow the first pair of true leaves, time seedlings should be replenished and fixed seedlings to ensure a sufficient number of seedlings. (6) timely intermediate ploughing, weeding, soil cultivation and topdressing: after seedling setting, one time of intermediate ploughing, weeding and soil cultivation, combined with topdressing seedling fertilizer: urea 5kg / mu + potassium chloride 10kg, or urea 5kg + compound fertilizer 15kg. If the plant growth is poor, you can apply fertilizer again at the flowering and pod stage.

Autonomous region quality Review Committee approval opinion: after examination, this variety meets the Guangxi soybean variety approval standard, through examination and approval, it can be planted in the soybean production area of the whole region.