Hongyou 527 (Rice)

Characteristics: this variety belongs to indica three-line hybrid rice. the average growth period of one-cropping middle rice in the upper reaches of the Yangtze River is 153.0 days, which is 0.2 days earlier than that of Shanyou 63. The plant height is 114.1 cm, the plant type is moderate, the population is neat, and the cold tolerance is weak. The number of effective panicles per mu is 162000 ears, ear length is 25.8cm, total grains per panicle is 152.4, seed setting rate is 79.2%, and 1000-grain weight is 32.7g. Resistance: Rice blast 9, bacterial blight 7, brown planthopper 9. Main indicators of rice quality: head rice rate 53.7%, aspect ratio 2.9, chalkiness 37%, chalkiness 5.3%, gel consistency 70 mm, amylose content 22.4%.

Yield performance: in the regional trial of medium indica late maturity and high yield group in the upper reaches of the Yangtze River in 2002, the average yield per mu was 578.73 kg, which was 5.94% higher than that of Shanyou 63 (extremely significant). In 2003, the average yield per mu was 609.23 kg, which was 6.19% higher than that of Shanyou 63 (extremely significant). In the two-year regional trial, the average yield per mu was 594.93 kg, which was 6.07% higher than that of Shanyou 63. In the production test in 2003, the average yield per mu was 621.45 kg, which was 7.47% higher than that of Shanyou 63.

Key points of cultivation techniques: 1, cultivate strong seedlings: according to local planting habits and Shanyou 63, sowing at the same time, sowing amount of 10 kg per mu of seedling field; 2, transplanting: seedling age controlled at 40-45 days, basic seedlings per mu 8-120000; 3, fertilizer and water management: 10-12 kg per mu of pure nitrogen, heavy bottom and early topdressing, increasing phosphorus and potassium fertilizer. Water slurry management should be dry and wet alternately, enough seedlings to dry the field, and should not be dehydrated prematurely in the later stage; 4. Control of diseases and insect pests: special attention should be paid to the control of rice blast and bacterial blight.

Approval opinion: after examination, the variety conforms to the national rice variety approval standard and has been approved. The variety has the advantages of moderate ripening period, high yield, high susceptibility to rice blast, susceptibility to bacterial blight and general rice quality. It is suitable to be planted as one-cropping middle rice in the middle and low altitude rice areas of Yunnan, Guizhou and Chongqing (except Wuling Mountain area), Pingba rice area of Sichuan and light incidence areas of rice blast and bacterial blight in southern Shaanxi.