【Main Characters of Varieties】

Sichuan: The whole growth period of spring sowing is 130 days. The first sheath is purple in color and has a spoon-shaped tip. The average plant height is 252.2 cm, and the ear height is 104.0 cm. In the angle between the leaves and the stem, the "Zig" of the stem is weak, the color of the leaf sheath is green, the number of first-order side branches of the tassel, the angle between the main axis of the tassel and the branches is large, the posture of the tassel side branches is moderately curved, and the tassel is above the high side branches. The main axis is long, the color of the base of the tassel glume is green, the color of the glume except the base is purple, the color of anthers is light purple, and the color of filaments is light purple. The ear shape is cylindrical, the ear length is 20.71cm, the number of ear rows is 16.1 rows, and the number of rows is 34 grains. The grain type is more horse-tooth type, the top of the grain is mainly orange-yellow, the back of the grain is orange-yellow, the color of the cob glume is red, and the arrangement of the grains is straight. Grain bulk weight is 763g/L, crude protein is 10.3%, crude fat is 5.2%, crude starch is 70.7%, and lysine is 0.29%.

Chongqing: The whole growth period is 131.1 days, which is 0.5 days shorter than Yudan 8. The plant height is 252.0 cm, the ear height is 104.0 cm, the plant type is semi-compact, the number of adult leaves is 20-21, the seedling sheath is purple, the leaf margin is purple, the glume is purple, the anther is light purple, and the filament is light purple. The ear length is 22.1 cm, and the number of ear rows is 16.0 to 18.0; the ear is cylindrical, the cob is red, the grain is orange, and the grain is partial. The weight of one hundred seeds is 33.2 grams.

【Adaptability】

Sichuan: In the mountainous area test in Sichuan Province in 2008, the average yield per mu was 533.2kg, which was an increase of 12.7% compared to the control Sichuan Dan 15, and the output increased by 9 points in 10 trials; the average yield in 2009 was 525.7 kg, an increase of 13.0% compared to the control Sichuan Dan 15 in 10 trials. Both increased production. In the production test in 2010, the average yield per mu was 543.9kg, which was 13.6% higher than the control Chuandan 15, and the output in all the 5 trials. After inoculation identification, it is moderately resistant to large leaf spot, small leaf spot, susceptible to sheath blight, head smut, and highly susceptible to stem rot.

Chongqing: In the one-year adaptability test in 2018, the average yield per mu at 10 points was 487.8 kg, which was an increase of 8.4% over the control Yudan 8. Resistance evaluation: resistance to ear rot, medium resistance to large spot, small spot, sheath blight, head smut and stem rot.

【Main cultivation measures】

Sichuan: Spring sowing, planting 3200-3500 plants per mu; re-apply base fertilizer, increase organic fertilizer, and attack ear fertilizer; pay attention to prevent and control diseases and insect pests.

Chongqing:

1. Suitable for spring planting, with a planting density of about 3000 plants per mu.

2. Fertilization and management are the same as general single cross species, re-apply base fertilizer, apply jointing fertilizer at the right time, and attack panicle fertilizer. 3. Timely control of pests and diseases.

[Suitable area for planting]

Planted in mountainous areas of Sichuan Province. Introduced in Hunan Province. Spring maize is introduced in mountainous and hilly areas at an altitude of 800 meters and below in the western part of Hubei Province. Planted in the spring sowing corn area in southern Shaanxi. Planted in corn planting areas above 800 meters above sea level in Chongqing. Corn plants are planted in 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 the altitude of 1,000 to 2,000 meters.