Detailed Introduction to the Rice Variety Hongyou 527
Characteristics: This variety is an indica three-line hybrid rice. When grown as a single-season mid-season rice in the upper reaches of the Yangtze River, the average whole growth period is 153.0 days, 0.2 days earlier than the control Shanyou 63. The plant height is 114.1 cm, the plant type is moderate, the population is uniform, and the cold tolerance is relatively weak. The number of effective panicles per mu is 162,000, the panicle length is 25.8 cm, the total number of grains per panicle is 152.4, the seed-setting rate is 79.2%, and the 1000-grain weight is 32.7 g. Resistance: rice blast grade 9, bacterial leaf blight grade 7, brown planthopper grade 9. Main rice quality indicators: head rice rate 53.7%, length-to-width ratio 2.9, chalkiness rate 37%, chalkiness degree 5.3%, gel consistency 70 mm, amylose content 22.4%.
Yield performance: In 2002, it participated in the regional trial of the late-maturing high-yield group of mid-season indica rice in the upper reaches of the Yangtze River, with an average yield of 578.73 kg per mu, 5.94% higher than the control Shanyou 63 (extremely significant); in 2003, in the continued trial, the average yield was 609.23 kg per mu, 6.19% higher than the control Shanyou 63 (extremely significant); the two-year regional trial average yield was 594.93 kg per mu, 6.07% higher than the control Shanyou 63. In 2003, the production test average yield was 621.45 kg per mu, 7.47% 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 seeding rate of 10 kg per mu of seedling field; 2. Transplanting: control the seedling age at 40-45 days, and transplant 80,000-120,000 basic seedlings per mu; 3. Fertilizer and water management: apply 10-12 kg of pure nitrogen per mu, with heavy basal application and early topdressing, and increase the application of phosphorus and potassium fertilizers. Water management should achieve alternating wet and dry conditions, drain the field when the tiller number is sufficient, and do not drain too early in the later stage; 4. Pest and disease control: pay special attention to the control of rice blast, and pay attention to bacterial leaf blight.
Approval opinion: After review, this variety meets the national rice variety approval standards and has passed approval. This variety has a moderate maturity period, high yield, is highly susceptible to rice blast, susceptible to bacterial leaf 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 (excluding the Wuling Mountain area), the plain rice areas of Sichuan, and the lightly affected areas of rice blast and bacterial leaf blight in southern Shaanxi.