[Main traits of varieties]:

Hubei: The plant is semi-compact. The leaf sheath of the seedlings is purple, and the upper leaves are purple in the later stage. The tassels are more developed. The ears are cone-shaped, with large angles, long stalks, slightly exposed tips, white cobs, yellow kernels, and half-horse dents. In the regional test, the plant height is 271 cm, the ear height is 110 cm, the empty stalk rate is 0.3%, the ear length is 19.8 cm, the bald tip length is 0.5 cm, the ear thickness is 5.3 cm, the number of ear rows is 16.0, the number of rows is 37.6, and the thousand-grain weight is 362 grams. The seed yield rate from dry ears is 87.8%, and the growth period is 137 days.

Chongqing: This variety is a mid-maturity hybrid corn. Under the adaptability test at a density of 2800 plants/mu, the seedling to maturity averaged 130.4 days, 1.2 days earlier than the control Yudan 8; the first sheath was purple, the plant type was semi-compact, and the plant height 271 cm, ear height 110 cm, leaf margin purple, adult leaf number 19, anther purple, glume purple, filigree pink; ear length 19.8 cm, ear row number 16-18, row grain number 37.6; Spike-shaped cone-shaped, white cobs, orange-yellow kernels, half-horse dent, 100-grain weight 34.2 grams.

[Adaptability]:

Hubei: Participated in the regional test of maize varieties in Enshi Prefecture, Hubei Province from 2009 to 2010. The quality was determined by the Food Quality Supervision, Inspection and Testing Center of the Ministry of Agriculture (Wuhan), with a bulk density of 749 g/l, a crude protein (dry basis) content of 9.73%, and crude fat ( Dry basis) content is 4.4%, crude starch (dry basis) content is 71.8%, and lysine (dry basis) content is 0.36%. The average yield per mu in the two-year regional test was 624.32 kg, which was an increase of 7.25% over the control Xingdan 13. Among them: the yield per mu in 2009 was 651.11 kg, an increase of 7.92% over Xingdan 13, and the yield per mu in 2010 was 597.52 kg, which was an increase of 6.54% over Xingdan 13. The field lodging (discount) rate is 1.9%. The disease resistance was identified as resistance to large spot, small spot, rust and Curvularia leaf spot, moderately susceptible to gray spot, susceptible to sheath blight, and the incidence of ear rot was 6.5%.

Chongqing: In a one-year adaptability test in 2016, the average output at 10 points was 502.7 kg, an increase of 11.7% over the control Yudan 8. Resistance evaluation: resistance to large spot disease, small spot disease, head smut, ear rot, medium resistance to sheath blight and stem rot.

[Main cultivation measures]:

Hubei:

1. Sowing seeds at the right time. The low mountain is sown in late March, and the second high mountain is sown in early April, with 3,000 to 3300 plants per acre for single cropping.

2. Scientific fertilization. Apply plantar fertilizer, 1500-2000 kg of decomposed farmyard manure, 20-30 kg of compound fertilizer per mu; timely topdressing, apply 7.5-10 kg of urea per mu for 4 to 5 leaves; reapply ear fertilizer, apply urea per mu in the bell-mouth period 15-20 kg.

3. Strengthen field management, timely cultivating and weeding, and cultivating soil.

4. Pay attention to the prevention and control of sheath blight, ear rot, corn borer and other diseases and insect pests.

Chongqing: Suitable for spring planting, with a density of about 2800-3000 plants per mu. Fertilization and management are the same as general single-cross species, re-application of base fertilizer, timely application of jointing fertilizer, and aggressive panicle fertilizer; timely control of pests and diseases.

[Suitable area for planting]:

It is suitable for planting in areas below 1200 meters above sea level in Enshi Prefecture, Hubei Province. It is planted in hills, flat dams and low mountain areas at an altitude of 800 meters and below in Chongqing. Changsha City, Hengyang City, Xiangtan City, Shaoyang City, Yueyang City, Changde City, Zhangjiajie City, Yiyang City, Chenzhou City, Yongzhou City, Huaihua City, Loudi City, Xiangxi Autonomous Prefecture introduced the species. Ten prefectures of Zhaotong City, Kunming City, Lijiang City, Dehong Prefecture, Qujing City, Chuxiong Prefecture, Dali Prefecture, Baoshan City, Lincang City, and Pu'er City in Yunnan Province are introduced between 1,000 and 2,000 meters above sea level.