Introduction to the Characteristics of the Bayou 8 Rice Variety
Characteristics: This variety is a japonica three-line hybrid rice. When grown as a single-season late rice in the middle and lower reaches of the Yangtze River, the average whole growth period is 149.4 days, 3.7 days later in maturity than the control Xiushui 63. The plant height is 112.2 cm, the plant type is moderate, the plants are relatively tall, the flag leaves are erect, the growth is luxuriant, the uniformity is average, and the secondary grain-filling phenomenon is relatively obvious. The number of effective panicles per mu is 203,000, the panicle length is 18.2 cm, the total number of grains per panicle is 139.5, the seed-setting rate is 81.8%, and the 1000-grain weight is 26 g. Resistance: rice blast grade 3, bacterial blight grade 5, brown planthopper grade 9. Main rice quality indicators: head rice rate 70.2%, length-to-width ratio 1.8, chalkiness rate 31.5%, chalkiness degree 5.2%, gel consistency 59.5 mm, amylose content 19.5%.
Yield performance: In 2001, it participated in the regional trial of the single-season late japonica group in the middle and lower reaches of the Yangtze River, with an average yield of 566.93 kg per mu, 2.96% higher than the control Xiushui 63 (significant); in 2002, it was continued in the trial, with an average yield of 579.46 kg per mu, 1.59% higher than the control Xiushui 63 (not significant); the two-year regional trial average yield was 573.50 kg per mu, 2.23% higher than the control Xiushui 63. In 2003, the production trial average yield was 568.21 kg per mu, 5.62% higher than the control Xiushui 63.
Key points of cultivation techniques: 1. Cultivate strong seedlings: sow at the same time as Xiushui 63 according to local planting habits, with a sowing rate of 20 kg per mu of seedling field, and control the seedling age within 30 days; 2. Reasonable close planting: the transplanting density is 23.3´19.9 cm, with 20,000 hills planted per mu; 3. Fertilizer and water management: the fertilization technique adopts the principle of promoting early, stabilizing in the middle, and controlling later. Apply 1000-1500 kg of farmyard manure, 30 kg of ammonium bicarbonate, 25 kg of phosphate fertilizer, and 10 kg of potassium fertilizer per mu as base fertilizer; after greening, apply 10 kg of urea, and when the flag leaf tip emerges, apply an additional 7.5 kg of compound fertilizer as panicle fertilizer depending on the situation. Water management should achieve frequent irrigation with shallow water, timely field drying, and avoid stopping water too early in the later stage; 4. Pest and disease control: pay attention to controlling bacterial blight.
Approval opinion: After review, this variety meets the national rice variety approval standards and has passed approval. This variety has a relatively late maturity, medium yield, moderate resistance to rice blast, moderate susceptibility to bacterial blight, and average rice quality. It is suitable for planting as single-season late rice in Zhejiang, Shanghai, Jiangsu, Hubei, and Anhui.