【Main Characters of Varieties】

Hubei: The plant is semi-compact. The seedling leaf sheath is purple, and the number of adult leaves is about 21. The tassels have about 20 branches, the anthers are light purple, the spikelets are purple, and the filaments are light purple. The bracts are moderate, the ears are cone-shaped, the cobs are white, the grains are yellow, and the teeth are shaped. In the regional test, the average plant height is 288 cm, the ear height is 125 cm, the ear length is 19.0 cm, the ear thickness is 5.3 cm, the bald tip length is 1.1 cm, the number of ear rows is 17.9, the number of rows is 39.2, the thousand-grain weight is 306.4 g, and the seed yield rate of dry ear is 87.9 %. The growth period is 138 days. The quality is determined by the Grain Quality Supervision, Inspection and Testing Center of the Ministry of Agriculture. The test weight is 766 g/l, the content of crude starch (dry basis) is 73.26%, the content of crude protein (dry basis) is 10.04%, the content of crude fat (dry basis) is 4.47%, and lysine is used. The acid (dry basis) content is 0.26%.

Sichuan: The whole growth period of spring sowing is about 123 days. The color of the first sheath is purple, and the tip of the first leaf is spoon-shaped; the plant height is 242.8 cm, and the ear position is 85.5 cm; in the angle between the leaves and the stem, there is no zigzag degree of the stem, the color of the sheath is green, and the number of first-level collaterals in the tassel is medium , The angle between the main axis of the tassel and the branches is large, the posture of the side branches of the tassel is moderately curved, the length of the main axis above the side branches of the tassel is long, the color of the base of the tassel glume is purple, the color of the glume except the base is purple, the color of anthers (fresh anthers) )Purple, silk color green, powder-spreading period late, silking period late, ear shape cylindrical, ear row 18, row grain 41, grain color yellow, middle grain type, the main color of the top of the seed is orange, the color of the back of the seed is orange Yellow, 1,000 grains weighing 297 grams. Grain bulk weight is 732g/L, crude protein is 10.5%, cob glume is white, crude fat is 4.7%, crude starch is 70.7%, and lysine is 0.34%.

Guizhou: The full growth period is 119 days, which is 1 day shorter than the control Qiandan 16. The plant type is flat, the plant height is 256 cm, and the ear height is 108 cm. The anthers are purple-red, the filaments are light purple; the ears are cylindrical, the ear length is 19 cm, and the number of ear rows is 17.7. The bract cover is short, the grain is yellow, half-horse tooth type, 100-grain weight is 35.2 grams, and the cob is white. Tested by the Grain and Product Quality Supervision, Inspection and Testing Center of the Ministry of Agriculture: test weight: 782g/L, crude starch 72.57%, crude protein 9.89%, crude fat 5.07%, and lysine 0.30%.

Chongqing: This variety is a mid-maturity hybrid corn. At a density of 2800 plants/mu in the adaptability test, the seedling to maturity averages 131 days, which is 0.6 days earlier than the control Yudan 8; the first sheath is purple, the plant is semi-compact, and the plant is tall. 242 cm, ear height 85 cm, leaf margin purple, adult leaf number 20, anther purple, glume purple, filigree green; ear length 22.9 cm, ear rows 18-20 rows, row grains 36.9; ears It has a cylindrical shape, white cobs, orange-yellow kernels, middle-shaped kernels, and a weight of 29.7 grams per 100 kernels.

【Adaptability】

Hubei: Participated in the regional test of maize varieties in the Ershan Group of Hubei Province from 2009 to 2010. The average yield per mu in the two-year regional test was 684.11 kg, which was 12.54% higher than the control Eyu No. 10. Among them: the yield per mu in 2009 was 725.14 kg, an increase of 13.10% over the control; the yield per mu in 2010 was 643.08 kg, an increase of 11.86% over the control. Field large spot disease is 1.5 grade, small spot disease is 2.3 grade, stem rot diseased plant rate is 5.4%, rust disease is 1.4 grade, ear rot is 1.7 grade, and sheath blight disease refers to 13.8. The field lodging (discount) rate was 18.1%.

Sichuan: In 2009, the average yield per mu in the provincial and regional trials was 500.5 kg, which was an increase of 18.9% compared to the control Sichuan Dan 13, and the output increased in all 6 pilots. In 2010, the average yield per mu in the provincial and regional trials was 417.84 kg, an increase of 9.39% compared to the control Sichuan Dan 13, 9 pilots 8. Point to increase production. In the production test in 2011, the average yield per mu was 534.8 kg, an increase of 19% over the control. Inoculation identification, moderate resistance to large leaf spot, stem rot, susceptible to small leaf spot, sheath blight, corn borer.

Guizhou: In 2012, the average yield per mu of the provincial regional test group F was 685.4 kg, which was an increase of 5.87% over the control; in 2013, the average yield per mu was 629.9 kg, which was an increase of 15.18% over the control. The average yield per mu in the two years was 657.7 kg, an increase of 10.13% over the control, a 16 increase and 3 decrease at 19 points, and an increase of 84.2%. In 2013, the provincial production test had an average yield of 656.5 kg per mu, an increase of 12.19% compared to the control, with an increase of 4 at 5 points and 1 decrease, and the increase in output reached 80%. Appraised by the Institute of Plant Protection, Sichuan Academy of Agricultural Sciences: medium resistance to large leaf spot, small leaf spot, stem rot, ear rot, head smut and sheath blight.

Chongqing: In the one-year adaptability test in 2016, the average output at 10 points was 479.3 kg, which was an increase of 6.5% over the control Yudan 8. Resistance evaluation: susceptible to small spot disease, resistance to head smut, ear rot, medium resistance to large spot disease, sheath blight and stem rot.

【Main cultivation measures】

Hubei:

1. Plant seeds at the right time and plant them closely. Sowing in early and mid-April, the planting density of single cropping is about 3000 plants per mu.

2. Formula fertilization. Grasp the principle of fertilization before control, middle promotion, and after supplement, apply plantar fertilizer, combine with intertillage and weeding and topdressing in time, and apply granular fertilizer in the later stage.

3. Strengthen field management. Pay attention to squatting seedlings, do a good job in cultivating and weeding, cultivating soil, and resisting drought and draining waterlogging.

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

Sichuan: Sowing at the right time, sowing in early and mid-April. Reasonably close planting, 3000-3500 plants per mu is appropriate. Strengthen field management and apply foot fertilizer. Combine topdressing and weeding twice. Pay attention to the prevention and control of pests and diseases.

Guizhou:

1. Sowing seeds at the right time. Generally, the seeds will be sown after the temperature has passed 12℃ stably in the first half of April.

2. Ensure the whole seedlings. Improve the quality of soil preparation, sowing 2 to 3 seeds per hole.

3. Reasonable dense planting. Taking into account the advantages of large ears and plant type, the planting density per mu is 3000-3500 plants.

4. Strengthen field management. To apply plantar fertilizer, use 50 kg of special compound fertilizer per acre, 1,000 kg of farmyard manure, 1 kg of zinc fertilizer, 15 kg of urea per acre in the 5-leaf stage, and 25 kg of urea per acre in the 11-12-leaf stage. Combine topdressing and weeding twice.

5. Pay attention to the prevention and control of pests and diseases. The low-lying land should be well cleaned and drained, which can effectively reduce the occurrence of diseases. In the big bell-mouth period, 150 grams of BT insecticide per acre is used to control corn borer with fine sand and lost heart leaves.

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 spring maize planting in the two mountain areas of Hubei Province. Pingba and hilly areas in Sichuan Province. Guiyang City, Zunyi City, Anshun City, Qiannan Prefecture, Qiandongnan Prefecture, Tongren City, Bijie City, Qianxinan Prefecture and Liuzhi Special Zone in Guiyang City, Zunyi City, Anshun City, Qiannan Prefecture, Qiandongnan Prefecture, Tongren City, Bijie City, Qianxinan Prefecture and Liuzhi Special Zone are planted in upper and middle-class fertile soil below 1500 meters above sea level It is planted in hills, flat dams and low mountain areas at an altitude of 800 meters and below in Chongqing. Introduced in Hunan Province. Planted in the spring sowing corn area in southern Shaanxi. The corn planting areas of Chuxiong Prefecture, Dali Prefecture, Baoshan City, Lincang City, Pu'er City, Qujing City, Zhaotong City, Kunming City, Lijiang City and Dehong Prefecture of Yunnan Province are 1,000-2,000 meters above sea level.