Guodao No. 1 (formerly known as Zhongyou 6) (Rice)

Characteristics: this variety belongs to indica three-line hybrid rice. the average growth period of double-cropping late rice in the middle and lower reaches of the Yangtze River is 120.6 days, which is 2.6 days later than that of Shanyou 46. The plant height is 107.8 cm, the stem is stout, the plant type is moderate, the growth is luxuriant, and the sword leaf is more clothed. The number of effective panicles per mu is 178000 ears, the ear length is 25.6cm, the total grains per ear is 142.0, the seed setting rate is 73.5%, and the 1000-grain weight is 27.9g. Resistance: Rice blast 9, bacterial blight 7, brown planthopper 9. Main indicators of rice quality: head rice rate 55.9%, aspect ratio 3.4, chalkiness rate 21%, chalkiness 3.4%, gel consistency 64 mm, amylose content 21.2%.

Yield performance: in 2002, participated in the regional trial of late indica medium-late maturity and high quality group in the middle and lower reaches of the Yangtze River, the average yield per mu was 446.52 kg, which was 3.77% higher than that of Shanyou 46 (extremely significant); in 2003, the average yield per mu was 469.91 kg, which was 0.92% lower than that of Shanyou 46 (not significant); the average yield per mu in the two-year regional trial was 458.22 kg, which was 1.43% higher than that of Shanyou 46. In the production test in 2003, the average yield per mu was 433.60 kg, which was 1.76% higher than that of Shanyou 46.

Main points of cultivation techniques: 1. Cultivate strong seedlings: according to local planting habits, sowing at the same time with Shanyou 46, sowing amount in seedling field is 6 kg, seedling age is within 30 days; 2, transplanting: planting more than 13000 holes per mu, basic seedlings per mu 60-70 000; 3, fertilization: increase organic fertilizer, heavy application of base fertilizer, early application of topdressing fertilizer, skillful application of panicle fertilizer, 50 kg of special fertilizer per mu for rice base fertilizer, and 7.5 kg of urea within 10 days after planting. 4. Water slurry management: turning green in deep water, promoting tillering in shallow water, drying the field in time, drying in shallow water for many times, keeping fetus in shallow water, preserving water and flowers, preventing water cut off too early and preventing premature senility. 5. Control of diseases and insect pests: pay special attention 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 moderate ripening period, medium yield, high susceptibility to rice blast, susceptibility to bacterial blight and excellent rice quality. It is suitable to be planted as double cropping late rice in the areas with light incidence of rice blast and bacterial blight in north-central Guangxi, north-central Fujian, south-central Jiangxi, south-central Hunan and southern Zhejiang.