T excellent 15

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★ Main characters of the variety
This variety belongs to indica three line hybrid rice.
After being approved, the annual sales volume of one million catties will remain prosperous, making it an ideal variety for large-scale promotion of main varieties in southern double cropping rice regions, selected as the main variety for centralized seedling raising in early rice government procurement in Hunan Province, the national reserve variety for disaster relief and famine preparedness, the main variety for direct seeding after spring and summer floods in the middle and lower reaches of the Yangtze River, and the ideal variety for simplified cultivation of direct seeding after wheat stubble in the Huaihe River basin.
The average growth period of early rice in the middle and lower reaches of the Yangtze River was 109.9 days, 2.6 days later than that of Zhe 733. The plant type is moderate, the color changes well at maturity, the number of effective ears per mu is 228000, the plant height is 91.7cm, the ear length is 21.4cm, the total number of grains per ear is 120.6, the seed setting rate is 77.5%, and the 1000 grain weight is 24.4g. Main indexes of rice quality: head rice rate 52.6%, length width ratio 2.7, chalky grain rate 92%, chalkiness 11.7%, gel consistency 74 mm, amylose content 25.4%. The average yield per mu of large area planting is 500-550 kg.

★ Main cultivation measures
1. Seedling raising: timely sowing, suitable for direct seeding in the field, dry breeding and seedling throwing, and conventional water seedling cultivation. The seed consumption per mu in the field is 2-2.5 kg, and the seeds are sown thinly and evenly to cultivate strong seedlings.
2. Transplanting: dry raised seedlings 3.5-4 leaves (throwing), water raised seedlings 5-5.5 leaves (25-30 days). Reasonable close planting, planting size 16.7cm × 20 cm, 2-3 grain seedlings are planted in each hole, and 90000 to 100000 basic seedlings are planted per mu.
3. Fertilizer and water management: the level of fertilizer required is medium. 400-500 kg organic fertilizer mixed with 25-30 kg compound fertilizer is applied as the base fertilizer per mu in the field. 8-10 kg urea and 6-8 kg potassium chloride are applied per mu after transplanting and returning to green. Ear and grain fertilizers are supplemented according to the seedlings. Adopt shallow water and moist intermittent irrigation to promote tillering, put enough seedlings in the field in time, keep shallow water in the middle and late booting stage and heading and flowering stage, alternate dry and wet in the filling and fruiting period, and cut off water 6-7 days before harvest.
4. Disease and insect prevention: pay attention to the timely prevention and control of rice blast, bacterial leaf blight, sheath blight, rice leaf roller, rice stem borer, rice planthopper, rice stem miner and other diseases and insect pests.

★ Suitable planting area
This variety has a late maturity, high yield, high susceptibility to rice blast and bacterial blight. It is suitable for early rice planting in double cropping rice areas where rice blast and bacterial leaf blight occur lightly in Jiangxi, Hunan, Anhui and Zhejiang.