Bayou 8 (Rice)

Characteristics: this variety belongs to japonica three-line hybrid rice. the average growth period of single cropping late rice in the middle and lower reaches of the Yangtze River is 149.4 days, which is 3.7 days later than that of Xiushui 63. The plant height is 112.2 cm, the plant shape is moderate, the plant is tall, the sword leaf is straight, the growth is luxuriant, the uniformity is general, the secondary grouting phenomenon is more obvious. The number of effective panicles per mu is 203000 ears, ear length is 18.2 cm, total grains per panicle is 139.5, seed setting rate is 81.8%, and 1000-grain weight is 26 grams. Resistance: Rice blast 3, bacterial blight 5, brown planthopper 9. Main indicators of rice quality: head rice rate 70.2%, aspect ratio 1.8, chalkiness rate 31.5%, chalkiness 5.2%, gel consistency 59.5 mm, amylose content 19.5%.

Yield performance: in 2001, participated in the regional trial of single season late japonica group in the middle and lower reaches of the Yangtze River, the average yield per mu was 566.93 kg, which was 2.96% higher than that of Xiushui 63 (significant). In 2002, the average yield per mu was 579.46 kg, 1.59% higher than that of Xiushui 63 (not significant). The average yield per mu in the two-year regional trial was 573.50 kg, 2.23% higher than that of Xiushui 63. In the production test in 2003, the average yield per mu was 568.21 kg, which was 5.62% higher than that of Xiushui 63.

Key points of cultivation techniques: 1. Cultivate strong seedlings: according to local planting habits and Xiushui 63, sowing at the same time, sowing 20 kg per mu, seedling age is controlled within 30 days; 2, reasonable close planting: planting density is 23.3 '19.9 cm, planting 20,000 holes per mu 3. Fertilizer and water management: the fertilization technology adopts the principle of promoting, stabilizing and controlling. 1000-1500 kg of farm manure, 30 kg of ammonium bicarbonate, 25 kg of phosphate fertilizer and 10 kg of potash fertilizer are applied per mu, and 10 kg urea is applied after turning green. 7.5kg compound fertilizer was applied as panicle fertilizer when the sword leaves were exposed to the tip. Water slurry management should be frequently irrigated in shallow water, timely drying the field, and do not cut off water too early in the later stage; 4, control diseases and insect pests: pay attention to the prevention and control of bacterial blight.

Approval opinion: after examination, the variety conforms to the national rice variety approval standard and has been approved. The variety is late in maturity, medium in yield, moderately resistant to rice blast, moderately susceptible to bacterial blight and average in rice quality. It is suitable to be planted as single cropping late rice in Zhejiang, Shanghai, Jiangsu, Hubei and Anhui.