Introduction to the Characteristics of the Rice Variety Fengyou 416

Variety source: Fengyuan A ´ R416

Characteristics: This variety is an indica three-line hybrid rice. When grown as double-season late rice in the middle and lower reaches of the Yangtze River, the average whole growth period is 122.9 days, 1.8 days later maturing than the control Shanyou 46. Plant height is 96.6 cm, plant type is moderate, the population is uniform, and it is relatively prone to shattering. Effective panicles per mu are 194,000, panicle length is 22.5 cm, total grains per panicle are 112.9, seed setting rate is 83.5%, and 1000-grain weight is 28.2 g. Resistance: rice blast grade 7, bacterial leaf blight grade 9, brown planthopper grade 7. Main rice quality indicators: head rice rate 63%, length-to-width ratio 2.7, chalkiness rate 57%, chalkiness degree 10.9%, gel consistency 47.5 mm, amylose content 21.5%.

Yield performance: In 2001, it was entered in the regional trial of the late indica medium-late maturity high-yield group in the middle and lower reaches of the Yangtze River, with an average yield of 495.49 kg per mu, 1.16% higher than the control Shanyou 46 (not significant); in the 2002 continued trial, the average yield was 474.81 kg per mu, 7.89% higher than the control Shanyou 46 (highly significant); the two-year regional trial average yield was 484.46 kg per mu, 4.38% higher than the control Shanyou 46. In the 2003 production trial, the average yield was 462.27 kg per mu, 2.15% lower than the control Shanyou 46.

Key cultivation techniques: 1. Grow strong seedlings: according to local planting habits, sow 1-2 days earlier than Shanyou 46, with a seeding rate of 10-15 kg per mu; 2. Transplanting: seedling age should not exceed 30 days, and the planting density is 20 ´ 20 cm or 16.7 ´ 23.3 cm, with 50,000-80,000 basic seedlings per mu; 3. Fertilizer and water management: before transplanting, apply 30 loads of decomposed barnyard manure plus 30 kg of phosphate fertilizer per mu as base fertilizer, and within 7 days after planting, topdress with 8-10 kg of urea to promote early growth and rapid development; at the young panicle differentiation stage, apply 2.5 kg of urea plus 5-7 kg of potassium chloride per mu as a mixed application to promote large panicles and strong stems in the later stage. For water management, alternate wetting and drying irrigation should be adopted in the later stage, and do not drain too early; 4. Pest and disease control: pay attention to controlling rice blast and bacterial leaf blight.

Approval opinion: Upon review, this variety meets the national rice variety approval standards and has passed approval. This variety has moderate maturity, relatively high yield, is susceptible to rice blast, highly susceptible to bacterial leaf blight, and has average rice quality. It is suitable for planting as double-season late rice in lightly affected areas of rice blast and bacterial leaf blight in central and northern Guangxi, central and northern Fujian, central and southern Jiangxi, central and southern Hunan, and southern Zhejiang.