Yunliangyou 5455

★ Main characters of the variety
Indica two-line hybrid rice varieties.
In the middle and lower reaches of the Yangtze River, the whole growth period of late maturing middle rice was 140.4 days, 0.9 days longer than that of Fengliangyou No. 4. The plant height is 114.5 cm, the spike length is 24.2 cm, the effective spikes per mu are 149000, the total grains per spike are 225.4, the seed setting rate is 82.0%, and the 1000 grain weight is 27.0 g. Main indexes of rice quality: head rice rate 59.3%, length width ratio 3.0, chalky grain rate 62%, chalkiness 14.7%, gel consistency 77 mm, amylose content 14.6%.

★ Adaptability
Yield performance: participated in the regional green channel test of medium indica late maturing group in the middle and lower reaches of the Yangtze River in 2014, with an average yield of 650.30 kg per mu, 7.70% more than that of the control Fengliangyou No. 4; In 2015, the average yield per mu was 707.51kg, 5.63% higher than that of Fengliangyou No.4; The average yield per mu in two years' regional trials was 678.91kg, 6.7% higher than that of Fengliangyou No. 4. In the production test in 2016, the average yield per mu was 627.31kg, 8.0% higher than that of Fengliangyou No. 4.
Resistance: the comprehensive indexes of rice blast in two years were 5.5 and 6.0, respectively, and the loss rate of ear blast was the highest in seven grades; Grade 7 of bacterial blight;; Susceptible to rice blast, bacterial leaf blight, and highly susceptible to brown planthopper.

★ Main cultivation measures
1. Cultivate seedlings by precise sowing. In the middle and late April, the medium rice will be sown, with a seed consumption of 1.0kg per mu of field and 6-7kg per mu of seedling field. The seed will be sown thinly and evenly, and the management of fertilizer and water in the seedling field will be strengthened.
2. Planting early in time to promote tillering. The seedlings were transplanted at 5-6 leaf stage, and the seedling age was 25-30 days; Dry raised seedlings are transplanted at 3.5-4 leaf stage, and the seedling age is 15-18 days. Line spacing 7 × 8 inch or 6 × 9 inches, 2 grain seedlings per hole, 70000-90000 basic seedlings per mu.
3. Scientific fertilization and water management. The level of fertilizer required in the field is relatively high. 45-50kg of high concentration compound fertilizer or 50-60kg of common compound fertilizer are applied per mu as base fertilizer, 8-10kg of urea is applied per mu 5-7 days after planting, 8-10kg of potassium chloride is applied per mu 16-18 days after planting, and 10-15kg of high concentration compound fertilizer and 12-15kg of potassium chloride are applied per mu according to the field appearance in the early booting stage. It turns green in inch water, tillers in shallow water and wet water, enough for seedlings to dry in the field, keeps shallow water in booting and heading stage, alternates dry and wet in filling and mature stage, and drains water 6-8 days before harvest.
4. Comprehensive pest control. Timely control rice planthopper, rice leaf roller, sheath blight, etc., and focus on the prevention of seedling and leaf blast and the prevention of ear neck blast at the break heading stage.

★ Suitable planting area
It is suitable to grow one crop of medium rice in Hubei Province (except Wuling Mountain Area), Hunan Province (except Wuling Mountain Area), Jiangxi Province, Anhui Province, Jiangsu Province, Zhejiang Province, northern Fujian Province, and southern Henan Province. It is not suitable to plant in areas with severe rice blast.

★ Planting season
In the middle and lower reaches of the Yangtze River, it is suggested to sow rice from April 5 to May 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.