Shimai 15

Characteristics: semi-winter, middle maturity, mature stage is about 1 day later than the control stone 4185. The seedlings are creeping, strong in growth, strong in tillering ability and high in panicle rate. The plant height is about 78 cm, the plant type is compact, the culm is thin, the flag leaf is small and upward, the leaf is curly, the lower node of the ear is short, and the ear layer is neat. Spike spindle type, spikelet small, spikelet arranged densely, short awn, white shell, white grain, grain full, half-horny. The average number of ears per mu is 435000 ears, the number of grains per ear is 35.6grains, and the weight of 1000 grains is 38.4g. The lodging resistance is mediocre. It is better to be mature and yellow. Cold resistance identification: cold resistance is good. Identification of disease resistance: medium resistance to stem rust, slow leaf rust, middle to high susceptibility to stripe rust, high susceptibility to scab, sheath blight, powdery mildew. In 2006 and 2007, the mixed samples were determined: bulk density 789g / L and 784g / L, protein (dry base) content 13.48,14.01%, wet gluten content 30.1%, 31%, sedimentation value 20.0ml, 18.8ml, water absorption 56.0%, 56.9%, stability time 2.0min, 1.4min, maximum extension resistance 119E.U, 88E.U, extensibility 11.6cm, 11.8cm. The stretched area is 20 square centimeters and 14 square centimeters.

Yield performance: participated in the regional trial of water land group varieties in the north part of Huang-Huai winter wheat region from 2005 to 2006. the average yield per mu was 523.8 kg, 5.24% higher than that of Shi 4185, which was 5.24% higher than that of Shi 4185, and the average yield per mu was 531.3 kg, 4.03% higher than that of Shi 4185. In the production test from 2006 to 2007, the average yield per mu was 575.2 kg, which was 4.34% higher than that of Shi 4185.

Key points of cultivation techniques: the suitable sowing date is October 1-15. The sowing rate should be strictly controlled, and it is suitable for 150000 ~ 180000 seedlings per mu in high water and fertilizer land and 180000 ~ 200000 seedlings in reclaimed water and fertilizer land. Pay attention to disease prevention in the later stage. Pay attention to preventing lodging in high water and fertile land.