Mian 2 you 838 (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 150.4 days, which is 2.7days earlier than that of Shanyou 63. The plant height is 110.7 cm, the plant type is moderate, the grain weight per ear is coordinated, the lodging resistance is strong, and the color change is good at ripening stage. The tillering ability is weak and the cold tolerance is strong. The number of effective panicles per mu is 159000 ears, the ear length is 25.2cm, the total grains per panicle is 163.0, the seed setting rate is 81.8%, and the 1000-grain weight is 28.9g. Resistance: Rice blast 9, bacterial blight 7, brown planthopper 7. Main indicators of rice quality: head rice rate 60.1%, aspect ratio 2.7, chalkiness rate 42%, chalkiness 12.9%, gel consistency 58 mm, amylose content 21.7%.

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 591.2 kg, which was 8.22% higher than that of Shanyou 63 (extremely significant). In 2003, the average yield per mu was 586.82 kg, which was 2.28% higher than that of Shanyou 63 (extremely significant). The average yield per mu in the two-year regional trial was 588.87 kg, which was 4.99% higher than that of Shanyou 63. In the production test in 2003, the average yield per mu was 663.62 kg, which was 11.18% 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, sowing amount of 7.5-10 kg per mu, raising seedlings in two stages or dry raising seedlings, the seedling age is no more than 50 days; 2, transplanting: 15-20 000 holes per mu, basic seedlings per mu 12-140000; 3, fertilization: about 10 kg of pure nitrogen is applied in medium fertility fields, and the ratio of nitrogen, phosphorus and potassium is 0.50.7. 60-70% of base fertilizer, 20-30% of tiller fertilizer and 10% of panicle fertilizer. 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. This variety has 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.