Jinyou 448 (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 111.9 days, which is 1.8 days earlier than that of Shanyou 64. The plant height is 88.4 cm, the plant type is moderate, the plant is short, the flag leaf is straight, the grain weight per ear is coordinated, it is easy to drop grains, and it is easy to lodge in the later stage. The number of effective panicles per mu is 204000 ears, ear length is 23.2cm, total grains per panicle is 110.4, seed setting rate is 83.4%, and 1000-grain weight is 28g. Resistance: Rice blast 7, bacterial blight 7, brown planthopper 9. Main indicators of rice quality: head rice rate 58.1%, aspect ratio 3.3, chalkiness rate 35.5%, chalkiness 4%, gel consistency 45 mm, amylose content 22.0%.

Yield performance: in 2001, participated in the regional trial of late indica early maturity and high yield group in the middle and lower reaches of the Yangtze River, the average yield per mu was 499.21 kg, which was 1.52% higher than that of Shanyou 64 (not significant); in 2002, the average yield per mu of high quality group was 453.55 kg, which was 3.09% higher than that of Shanyou 64 (extremely significant); the average yield per mu in the two-year regional trial was 475.59 kg, which was 2.29% higher than that of Shanyou 64. In the production test in 2003, the average yield per mu was 472.84 kg, which was 8.33% higher than that of Shanyou 64.

Key points of cultivation techniques: 1, cultivate strong seedlings: sow at the same time with Shanyou 64 according to local planting habits; 2, transplant: 16-20 thousand holes per mu, basic seedlings 10-120000; 3, fertilization: 8-10 kg per mu of pure nitrogen, 25-30 kg of phosphate fertilizer, 15-20 kg of potash fertilizer; 4, control of diseases and insect pests: pay 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, susceptible to rice blast and bacterial blight, and average 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 Jiangxi, Hunan, north-central Zhejiang and Hubei and Anhui provinces.