[Main traits of varieties]:

Yunnan: The average growth period is 114-115 days, the seedling sheath is purple, the plant is semi-compact, the plant height is 260.3-273.3 cm, the tassel branches are 10, the anther is purple, the filament is light purple, the ear position is 101.2-103.6 cm, and the ear length is 15.8 -16.9 cm, tube-shaped ear, moderate bracts, 0.7-0.9 cm bald tip, 16-17 rows of ears, 32-35 rows of grains, white cobs, yellow denticles, weight of 100 seeds 29.7- 32.6 grams, the seed yield rate is 85.8-85.9%. Quality inspection: test weight 768g/L, moisture 9.9%, crude protein 12.19%, crude fat 4.66%, crude starch 70.77%, lysine 0.32%. Disease inoculation identification: resistance to head smut, medium resistance to gray spot, stem rot, moderately susceptible to Curvularia leaf spot, rust, susceptible to small spot, large spot, ear rot, and sheath blight.

Sichuan: The whole growth period is 117 days, the seedling leaf sheath is purple, the plant is semi-compact, the plant height is 281 cm, and the ear height is 108 cm. The ear length is 18.6 cm, the number of ear rows is 16.6 rows, the bald tip is 1 cm, the single ear grain weight is 227 grams, the grain is yellow, and the 100 grain weight is 40.4 grams. Half horse tooth type, white cob. In 2017, it was inoculated and identified by the Institute of Plant Protection, Sichuan Academy of Agricultural Sciences: medium resistance to large spot disease, small spot disease, sheath blight, stem rot, head smut, and ear rot. At the same time, the genetic traits of this variety are stable, and the plant performance among the populations is consistent; it has strong disease resistance and wide adaptability.

Chongqing: This variety is a mid-maturity hybrid corn. Under the adaptability test at a density of 2800 plants/mu, the average seedling to maturity is 130.6 days, which is 1.0 day earlier than the control Yudan 8; the first sheath is purple, the plant is semi-compact, and the plant is tall. 281 cm, ear height 108 cm, leaf margin purple, adult leaf number 20, anther purple, glume purple, filament light pink; ear length 18.6 cm, ear rows 16-18 rows, row grains 39.6 grains; Ear-shaped tube, white cob, orange-yellow, half-horse dent, 100-kernel weight 35.4 grams; resistance to small spot disease, ear rot, medium resistance to head smut, big spot, sheath blight and stem rot disease.

Guizhou: The full growth period is 126 days, which is equivalent to the control Qiandan 16. The seedling leaf sheath is purple, the plant is semi-compact, the height of the plant is 281 cm, and the height of the ear is 108 cm. The male ears branch about 10 at a time, the main axis above the low side branch is 32 cm long, and the main axis above the high side branch is 22 cm long. The male flower protects the glume purple, the glume purple, the anther purple, and the female silks light pink. The ear length is 18.6 cm, the number of ear rows is 16.6 rows, the bald tip is 1 cm, the single ear grain weight is 227 grams, the grain is yellow, and the 100 grain weight is 40.4 grams. Half horse tooth type, white cob. Tested by the Grain Quality Supervision, Inspection and Testing Center of the Ministry of Agriculture in 2015: test weight: 762 g/L, crude protein 10.32%, crude fat 4.51%, crude starch 73.44%, lysine 0.29%. Resistance identification: resistance to small spot disease, medium resistance to head smut, sheath blight, ear rot and stem rot, and susceptible to large spot disease and gray spot disease.

[Adaptability]:

Yunnan: Participated in the Yunnan Province Hybrid Maize Variety Regional Trial (Southern Group) from 2010 to 2011. The average yield per mu in the two-year regional trial was 615.4 kg, an increase of 9.0% compared with the control, and the rate of increase was 87.5%. The average yield per mu in the two-year trial in Jinghong was 34.9% lower than the control. The average yield per mu in the production test was 707.1 kg, an increase of 19.0% compared with the control, and the rate of increase in production was 100%.

Sichuan: The average yield per mu at 10 sites in Sichuan is 659.50 kg, an increase of 9.13% compared to the control single 30. The output increased by 10 points, and the output increased significantly.

Chongqing: In the one-year adaptability test in 2016, the average output at 10 points was 495.6 kg, which was an increase of 10.1% over the control Yudan 8.

Guizhou: In 2014, the average yield per mu in group D of the provincial regional test was 682.2 kg, which was 11.07% higher than the control, and the increase was extremely significant; in 2015, the average yield per mu in group D of the provincial regional test was 707.3 kg per mu, which was an increase of 14.65% over the control. The average yield per mu in the two years was 694.8 kg, an increase of 12.86% over the control, and the point of increase was 90%. In 2015, the provincial production test had an average yield of 548.4 kg per mu, an increase of 10.69% over the control, and all of the 8 pilots increased production.

[Main cultivation measures]:

Yunnan:

1. Plant seeds at the right time and plant them closely.

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. Do a good job in cultivating and weeding, cultivating soil, and fighting drought and draining waterlogging.

Sichuan: Single planting, planting density of about 3500-4000 plants per mu. Before planting, plow the ground to make the soil loose and level. Apply plantar fertilizer, 1000 kilograms of decomposed barn manure and 30 kilograms of special compound fertilizer for corn per acre. The first intertillage is carried out at 5 leaves, combined with 5-10 kg of urea per mu. Reapply fertilizer, and apply 15-20 kg of urea, 10 kg of compound fertilizer, and 5 kg of potassium fertilizer per mu depending on the growth of the corn in the small bell mouth. Simultaneous cultivation and soil cultivation; appropriate application of "grain fertilizer": According to the growth of corn, add "grain fertilizer" as appropriate in the later stage, generally 5-15 kg, mainly compound fertilizer + potassium fertilizer. Harvest in time after maturity, thresh, dry and store. Pay attention to the prevention and control of sheath blight and stem rot, the prevention and control of cutworms at the seedling stage, and the prevention and control of corn borers and small spot disease, sheath blight, ear rot and other diseases and insect pests at the big bell mouth stage.

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.

Guizhou: Sowing in Yichun, planting per plant, planting density of about 3500-4000 plants per mu. Before planting, plow the ground to make the soil loose and level. Apply plantar fertilizer, 1000 kilograms of decomposed barn manure and 30 kilograms of special compound fertilizer for corn per acre. The first intertillage is carried out at 5 leaves, combined with 5-10 kg of urea per mu. Reapply fertilizer, and apply 15-20 kg of urea, 10 kg of compound fertilizer, and 5 kg of potassium fertilizer per mu depending on the growth of the corn in the small bell mouth. Simultaneous cultivation and soil cultivation; appropriate application of "grain fertilizer": According to the growth of corn, add "grain fertilizer" as appropriate in the later stage, generally 5-15 kg, mainly compound fertilizer + potassium fertilizer. Pay attention to the prevention and control of sheath blight and stem rot, the control of cutworms at the seedling stage, and the control of corn borer at the big bell mouth stage. Harvest in time after maturity, thresh, dry and store.

[Suitable area for planting]:

Yunnan: Suitable for planting in suitable areas with an altitude of 1000-1900 meters in Yunnan Province; pay attention to the prevention and control of Curvularia leaf spot and rust, and use it with caution in areas with high incidence of small spot, large spot, ear rot and sheath blight.

Sichuan: Suitable for spring planting in Pingba and hilly areas of Sichuan.

Chongqing: Suitable for planting in hills, flat dams and low mountain areas at an altitude of 800 meters and below in Chongqing.

Hunan: Introduction and registration areas: 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

Hubei: Spring maize is introduced in mountainous and hilly areas at an altitude of 800 meters and below in the western part of Hubei Province.

Guangxi: Planted in Guangxi spring corn area.

Shaanxi: Planted in the spring sowing corn area in southern Shaanxi

Guizhou: Guiyang City, Zunyi City, Anshun City, Tongren City, Bijie City, Qiannan Prefecture, Qiandongnan Prefecture, Qianxinan Prefecture, Liuzhi Special Zone in the middle and upper fertile soil areas below 1500 meters above sea level in Guizhou Province, pay attention to the prevention and control Spot disease and gray spot disease.