Gs Zheng Mai 005 (formerly known as Zheng Mai 005)

Variety source: 85-5072/89330A-0-1

Characteristics: weak spring, middle maturity, maturity one day later than the control Yumai 18. The seedlings are semi-creeping, with strong tillering ability, dark green leaves and thin leaves. The plant height is 80 cm, the plant type is slightly loose, the ear layer is neat, and the flag leaf is narrow, long and upthrust. The average number of ears per mu is 440000 ears, the number of grains per ear is 30, and the weight of 1000 grains is 38 grams. Spike spindle type, long awn, white shell, white grain, keratin. Lodging resistance is general, winter cold resistance is medium, spring cold resistance is slightly weak, moisture resistance is general, mature phase is medium. Identification of inoculation resistance: slow stripe rust, moderately susceptible powdery mildew and stem rust, highly susceptible leaf rust, sheath blight and scab. In 2003 / 2004, the mixed samples were determined: bulk weight 804gram / L, protein content 15.26pm 15.4%, wet gluten content 33.5%, sedimentation value 56.7pm 46.8ml, water absorption 57.8pm 58.8%, dough stability time 9.2amp 5.6 minutes, maximum extension resistance 472/364E.U, stretch area 118cm square cm.

Yield performance: participated in the regional trial of Chunshui group in the south of Huang-Huai winter wheat region in 2002-2003. the average yield per mu was 449.0 kg, which was 2.8% higher than that of the control Yumai 18 (not significant). In 2003-2004, the average yield per mu was 515.8 kg, 3.6% higher than that of Yumai 18 (not significant), and 0.7% higher than Yumai 34-6 (not significant). The average yield per mu in the production test in 2003-2004 was 460.8 kg, 2.4% higher than that of the control Yumai 18.

Key points of cultivation techniques: suitable sowing date 10-25 October, suitable basic seedlings 12-150000 seedlings per mu, pay attention to control population to prevent lodging. Fertilization and watering: general application of farm manure 3-4 square, urea 12-15 kg, diammonium phosphate 20-25 kg, potassium sulfate 6-10 kg, urea 5-10 kg per mu at jointing-booting stage, foliar spraying urea at the initial stage of grain filling. During the growth period, try to water as little as possible, generally do not return to green water, combined with topdressing and booting water, watering slurry water as appropriate, in order to improve yield and quality. Pay attention to the control of leaf rust, sheath blight and scab.

Approval opinion: after examination, the variety conforms to the national variety approval standard and has passed the examination and approval. It is suitable to be planted in the middle and late cropping of high school water and fertilizer in Henan Province, northern Anhui Province, northern Jiangsu Province and Guanzhong area of Shaanxi Province in the south of Huang-Huai winter wheat region.