Qianfeng You900

Qianfeng You900   Guoshendao 20186115

★ Main characters of the variety
Indica three line hybrid rice varieties.
The whole growth period of double cropping late rice in the middle and lower reaches of the Yangtze River is 114.4 days, which is 4 days earlier than the control Wuyou 308. The plant height is 100.6 cm, the spike length is 23.7 cm, the effective spikes per mu are 185000, the total grains per spike are 164.9, the seed setting rate is 84.3%, and the 1000 grain weight is 26.1 g. Main indicators of rice quality: head rice rate is 58.2%, chalky grain rate is 22%, chalkiness is 5.0%, amylose content is 15.7%, gel consistency is 80 mm, length width ratio is 2.9, reaching grade 3 of the national standard of "high-quality rice".

★ Adaptability
Yield performance: participated in the regional test of late indica early maturing group in 2015, with an average yield of 585.34kg per mu, 3.30% more than the control Wuyou 308; In 2016, the average yield per mu was 606.75 kg, 3.55% more than the control Wuyou 308; The average yield per mu in two years' regional trials was 596.05 kg, 3.43% higher than that in the control Wuyou 308; In the production test in 2017, the average yield per mu was 598.76kg, 3.47% higher than the control Wuyou 308.
Resistance: the comprehensive indexes of rice blast in two years were 4.9 and 4.4, respectively. The loss rate of ear neck blast was the highest level, which was 7 levels. It was susceptible to rice blast, bacterial leaf blight, and had medium cold tolerance.

★ Main cultivation measures
1. Sow timely and cultivate strong seedlings. In the middle and lower reaches of the Yangtze River, double cropping late rice is generally sown around June 23. The seeding amount in the seedling field is 12.5 kg per mu, and the seed amount in the field is 1.5 kg per mu. It is sown thinly and evenly to cultivate strong tillers.
2. Planting early in time to promote tillering, and the seedling age should be controlled within 25 days. Transplanting specification 20cm × 20 cm, 2 grain rice seedlings are planted in each hole, and more than 80000 basic seedlings are planted per mu.
3. Re apply base fertilizer, apply topdressing as early as possible, and look at the fertilization method of supplementary ear fertilizer for seedlings in the later stage. In medium fertility soil, 10.5 kg of pure nitrogen, 6 kg of phosphorus pentoxide and 6.5 kg of potassium oxide are applied per mu. That is to say, when raking the field, 35 kg of 25% rice specific compound fertilizer shall be applied per mu, and 30~40 kg of silicon fertilizer with effective silicon content of 30~40% shall be added per mu as the base fertilizer. 5-7 days after planting, 6-7 kg of urea was topapplied, and 7.5 kg of potassium chloride was applied per mu at booting stage. After transplanting, the deep-water living stump can promote the tillering in shallow water during the tillering stage. The seedlings can fall into the water in time to dry the field again. Strong roots and strong stems can prevent lodging. Keep the field shallow from booting stage to heading stage. Dry, wet and strong seeds can be grown during the filling stage. It is forbidden to cut off water too early.
4. Disease and pest control. Persist in soaking seeds with strong chlorine. The rice planthopper was controlled by timely application of pesticides at seedling stage to prevent southern black streaked dwarf disease. In the field period, according to the disease and insect forecast, timely apply drugs to prevent and control the rice stem borer, rice planthopper, bacterial leaf blight, southern black streaked dwarf disease, sheath blight and other diseases and insect pests. Rice blast should be prevented and controlled.

★ Suitable planting area
It is suitable to plant late rice in the lightly affected areas of double cropping rice blast in Jiangxi Province, Hunan Province, Hubei Province, Anhui Province, and Zhejiang Province, but not in the heavily affected areas.

★ Planting season
It is suggested to plant late rice in the middle and lower reaches of the Yangtze River from June 15 to June 25.
Please pay attention to sowing and scientific management according to the specific arrangements of local climate, previous crops, seedling raising mode and planting habits, and according to the accurate time guided by the local agricultural technology department.