D you 128 (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 155.0 days, which is 2.4 days later than that of Shanyou 63. The plant height is 111.5 cm, the leaf shape is moderate, the population is neat, and the cold tolerance is medium. The number of effective panicles per mu is 177000 ears, ear length is 23.6cm, total grains per panicle is 174.3, seed setting rate is 78.9%, and 1000-grain weight is 24.5g. Resistance: Rice blast 9, bacterial blight 5, brown planthopper 9. Main indicators of rice quality: head rice rate 64.1%, aspect ratio 2.8, chalkiness rate 32%, chalkiness 2.0%, gel consistency 52mm, amylose content 26.2%.

Yield performance: in the regional trial of medium indica late maturity and high quality group in the upper reaches of the Yangtze River in 2002, the average yield per mu was 568.62 kg, which was 5.04% higher than that of Shanyou 63 (extremely significant). In 2003, the average yield per mu was 594.36 kg, which was 3.15% higher than that of Shanyou 63 (extremely significant). In the two-year regional trial, the average yield per mu was 582.30 kg, which was 4.01% higher than that of Shanyou 63. In the production test in 2003, the average yield per mu was 551.89 kg, which was 0.34% higher than that of Shanyou 63.

Main points of cultivation techniques: 1. Cultivating strong seedlings: according to local planting habits, sowing at the same time with Shanyou 63, the seedling age is about 45 days; 2, transplanting: planting 0.9-1.3 million holes per mu, basic seedlings about 100000; 3, fertilization: heavy bottom fertilizer early topdressing fertilizer, generally applying about 10 kg of pure nitrogen per mu, the ratio of nitrogen, phosphorus and potassium is 0.5. 4. Water slurry management: planting seedlings in shallow water, protecting seedlings in deep water, tillering in thin water and drying the field. 5. Control of diseases and 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, moderate 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 the light incidence area of rice blast in southern Shaanxi.