Detailed introduction to the rice variety D You 128
Characteristics: This variety is an indica three-line hybrid rice. Grown as a single-season mid-season rice in the upper reaches of the Yangtze River, its average whole growth period is 155.0 days, 2.4 days later maturing than the control Shanyou 63. Plant height is 111.5 cm, plant and leaf shape is moderate, the population is uniform, and cold tolerance is medium. The number of effective panicles per mu is 177,000, panicle length is 23.6 cm, total grains per panicle is 174.3, seed setting rate is 78.9%, and 1000-grain weight is 24.5 g. Resistance: rice blast grade 9, bacterial blight grade 5, brown planthopper grade 9. Main rice quality indicators: head rice rate 64.1%, length-to-width ratio 2.8, chalkiness rate 32%, chalkiness degree 2.0%, gel consistency 52 mm, amylose content 26.2%.
Yield performance: In 2002, it participated in the regional trial of the late-maturing high-quality mid-season indica group in the upper reaches of the Yangtze River, with an average yield of 568.62 kg per mu, 5.04% higher than the control Shanyou 63 (extremely significant); in 2003, it was continued in the trial, with an average yield of 594.36 kg per mu, 3.15% higher than the control Shanyou 63 (extremely significant); the two-year regional trial average yield was 582.30 kg per mu, 4.01% higher than the control Shanyou 63. In 2003, the production trial average yield was 551.89 kg per mu, 0.34% 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 seedling age of about 45 days; 2. Transplanting: transplant 9,000-13,000 hills per mu, with about 100,000 basic seedlings; 3. Fertilization: apply heavy basal fertilizer and early topdressing, generally applying about 10 kg of pure nitrogen per mu, with an N:P:K ratio of 1:0.5:0.5; 4. Water management: transplant in shallow water, protect seedlings in deep water, promote tillering with thin water, and drain the field for sunning once enough tillers are reached; 5. Pest and disease control: pay special attention to controlling rice blast, and pay attention to controlling 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, relatively high yield, is highly susceptible to rice blast, moderately susceptible to bacterial blight, and has average rice quality. It is suitable for planting as a single-season mid-season rice in the low- and medium-altitude rice areas of Yunnan, Guizhou and Chongqing (except the Wuling Mountain area), the flatland rice areas of Sichuan, and the lightly affected rice blast areas of southern Shaanxi.