Features
This is an indica two-line hybrid rice variety. It has been approved by the state in the middle and lower reaches of the Yangtze River. Its full growth period is 120.4 days, maturing 0.7 days earlier than the control variety, Wuyou 308. The plant height is 107 cm, the panicle length is 21.6 cm, the effective panicle number per mu is 204,000, the total number of grains per panicle is 164.7, the seed setting rate is 80.6%, and the thousand-grain weight is 24.9 g. Resistance: The comprehensive index for rice blast was 5.1 and 3.9 in two years, the highest level of neck blast loss was level 7, bacterial blight was level 5, and brown planthopper was level 9. It is susceptible to rice blast, moderately susceptible to bacterial blight, and highly susceptible to brown planthopper. It has moderate cold tolerance. Key rice quality indicators: head rice rate 57.1%, chalkiness 6.5%, amylose content 13.0%, gel consistency 76 mm, alkali spreading value 4.5, and length-width ratio 3.4.
Production performance
In 2017, it participated in the regional trial of the late indica early maturing group in the middle and lower reaches of the Yangtze River, with an average yield of 570.7 kg/mu, an increase of 3.7% compared with the control Wuyou 308. In 2018, the trial continued, with an average yield of 624.0 kg/mu, an increase of 3.1% compared with the control Wuyou 308. The average yield of the two-year regional trial was 597.4 kg/mu, an increase of 3.4% compared with the control Wuyou 308. In the production trial in 2019, the average yield was 630.8 kg/mu, an increase of 1.2% compared with the control Wuyou 308.
Key points of cultivation technology
Sow at the appropriate time to cultivate strong seedlings with multiple tillers. In Jiangxi, Hunan, and other regions, double-cropping late rice is generally sown in mid-June. The sowing rate in the seedbed is 10-12 kg per mu (667 square meters), and the sowing rate in the field is 1 kg per mu. Before sowing, disinfect the seeds by soaking them in strong chlorine solution to prevent diseases. 2. Transplant in a timely manner to ensure sufficient basic seedlings. The seedling age should be controlled within 25 days, with a plant spacing of 20×20 cm. Plant 1-2 seedlings per hole, and plant 17,000-20,000 holes per mu. 3. Scientific fertilizer and water management. Apply sufficient base fertilizer, apply tillering fertilizer early, and pay attention to increasing phosphorus and potassium fertilizer in the middle and late stages. In medium to high fertility fields, apply 10-12 kg of pure ammonia per mu, with a nitrogen, phosphorus, and potassium ratio of 2:1:2. Generally, apply 25-30 kg of 45% compound fertilizer per mu as base fertilizer. Top-dress the tillering fertilizer immediately after the seedlings have established themselves, using 5 kg of urea per mu. Apply the panicle fertilizer appropriately according to the seedling growth. Adopt shallow water transplanting, ensuring seedlings survive with just a small amount of water, frequent shallow irrigation in the early growth stage, timely and appropriate field drying in the middle stage, and moist irrigation in the later stage, avoiding premature water cut-off. 4. Pay attention to strengthening the prevention and control of rice blast, rice stem borer, and rice planthopper. Apply pesticides in a timely and appropriate manner according to the local occurrence and prevalence of pests and diseases. 5. Harvest in a timely manner to ensure rice quality.
Review opinion
This variety meets the national rice variety approval standards and has passed the approval. It is suitable for late rice planting in double-season rice areas in Jiangxi, Hunan, Hubei, Anhui and Zhejiang provinces where rice blast is less prevalent. It is not suitable for planting in areas where rice blast is more prevalent.
