Introduction to the Rice Variety II You 7954

Characteristics: This variety is an indica three-line hybrid rice. When grown as a single-season middle rice in the middle and lower reaches of the Yangtze River, the average whole growth period is 136.3 days, 3.0 days later maturing than the control Shanyou 63. Plant height is 118.9 cm, plant type is moderate, the population is uniform, leaf color is deep green, growth is luxuriant, and color change at maturity is moderate. The number of effective panicles per mu is 157,000, panicle length is 23.9 cm, total grains per panicle is 174.1, seed setting rate is 78.3%, and 1000-grain weight is 27.3 g. Resistance: rice blast grade 7, bacterial blight grade 5, brown planthopper grade 9. Main grain quality indicators: head rice rate 64.9%, length-to-width ratio 2.3, chalkiness rate 47%, chalkiness degree 9.3%, gel consistency 47 mm, amylose content 25.2%.

Yield performance: In 2002, it participated in the regional trial of the middle-season indica late-maturing high-yield group in the middle and lower reaches of the Yangtze River, with an average yield of 615.2 kg per mu, 10.96% higher than the control Shanyou 63 (extremely significant); in 2003, in the continued trial, the average yield was 526.62 kg per mu, 7.10% higher than the control Shanyou 63 (extremely significant); the two-year regional trial average yield was 567.75 kg per mu, 9.01% higher than the control Shanyou 63. In 2003, the production trial average yield was 514.89 kg per mu, 9.11% higher than the control Shanyou 63.

Key cultivation techniques: 1. Cultivate strong seedlings: sow at the same time as Shanyou 63 according to local planting habits, with a sowing rate of 10 kg per mu and a seedling age of 25-30 days; 2. Transplanting: the planting density is 16.6´26 cm or 13.3´30 cm, with 2 grain seedlings per hill, and 60,000-80,000 basic seedlings per mu; 3. Fertilizer and water management: basal fertilizer and tillering fertilizer account for more than 80%, with appropriate application of panicle and grain fertilizer, and the ratio of nitrogen, phosphorus, and potassium fertilizer is 1:0.5:0.8. Water management should use shallow water and frequent irrigation to promote tillering, and alternate wetting and drying at the later stage to prevent premature senescence; 4. Pest and disease control: pay attention to controlling rice blast and bacterial blight.

Approval opinion: Upon review, this variety meets the national rice variety approval standards and has passed approval. This variety has a moderate maturity period, high yield, is susceptible to rice blast, moderately susceptible to bacterial blight, and has average grain quality. It is suitable for planting as single-season middle rice in Fujian, Jiangxi, Hunan, Hubei, Anhui, Zhejiang, and Jiangsu in the Yangtze River basin (excluding the Wuling Mountain area), as well as in lightly affected rice blast areas in southern Henan.