【Main Characters of Varieties】

Sichuan: Spring sown in Pingqiu, Sichuan, with a growth period of 117.8 days. The color of the first sheath is purple, the tip of the first leaf is round to spoon-shaped, the leaf sheath is green in the angle between the leaves and the stem, the number of first-level collaterals is large, the angle between the main axis of the tassel and the branches is large, and the posture of the collaterals of the tassel is straight Type, the length of the main shaft above the high side branches of the tassel is long, the color of the base of the tassel glume is green, the color of the glume is green except the base, the color of the anther is light purple, the color of the filament is light purple, the shape of the ear is intermediate, the grain type is dentate, the top of the grain The main color is yellow, the back of the grain is orange-yellow, the cob glume is pink, and the grains are arranged straight. In the two-year regional test, the average plant height was 311.5 cm, and the ear height was 122.7 cm. The ear length is 20.2 cm, the number of ear rows is 16.6 rows, the number of rows is 36.3 grains, the hundred-grain weight is 36.4 grams, and the seed yield rate is 85.4%. The grain weight is 724 g/L, crude protein is 10.4%, crude fat is 3.9%, crude starch is 70.7%, and lysine is 0.36%.

Chongqing: This variety is a hybrid corn. The whole growth period was 123.3 days, which was 1.0 day shorter than the control Yudan 8. The plant height is 252.3 cm, the ear height is 101.2 cm, and the plant is semi-compact; the seedling sheath is purple, the number of adult leaves is about 20, the leaf margin is green, the glume is green, the anther is light purple, and the filament is light purple. Intermediate ear type, yellow kernel, horse tooth type, red cob. The ear length is 23.5 cm, the ear thickness is 5.1 cm, the number of ear rows is 17.6 rows, the number of rows is 38.4 grains, the hundred-grain weight is 37.3 grams, and the seed yield rate is 87.2%.

【Adaptability】

Sichuan: Participated in the Sichuan Corn Pingqiu Group Regional Test in 2016, with an average yield of 636.2 kg per mu, an increase of 9.6% compared to the control single 30; the continued test in 2017 averaged 619.8 kg per mu, an increase of 7.0% compared to the control single 30; The average yield per mu was 628.0 kg, which was an increase of 8.3% compared with the control single 30. In the production test in 2018, the average yield per mu was 552.0 kg, an increase of 6.3% compared to the control single 30. The average rate of increase in production points during the two-year regional trials and production trials was 91.7%. After inoculation identification: medium resistance to sheath blight, susceptible to large leaf spot, small leaf spot, ear rot, head smut and stem rot.

Chongqing: In the one-year adaptability test in 2020, the average yield of 7 points per mu is 594.7 kg, which is an increase of 9.0% over the control Yudan 8. Resistance evaluation: resistance to stem rot, medium resistance to large spot disease, small spot disease, ear rot, and susceptible sheath blight.

【Main cultivation measures】

Sichuan:

1. Sowing period: suitable for spring sowing;

2. Planting density: it is advisable to plant about 3200 plants per mu;

3. Fertilizer and water management: re-application of base fertilizer, light application of jointing fertilizer, and heavy application of attacking fertilizer;

4. Pest control: comprehensive control of plant diseases and insect pests.

Chongqing: 1. Suitable for spring sowing, with a planting density of about 3,000 plants per mu; 2. Fertilization and management are the same as general single crosses, re-application of base fertilizer, timely application of jointing fertilizer, and aggressive panicle fertilizer; 3. Timely control of pests and diseases.

[Suitable area for planting]

It is suitable for planting in Pingba hilly spring corn type areas in Sichuan Province. Spring maize is introduced in mountainous and hilly areas at an altitude of 800 meters and below in Hubei Province. It is planted in areas with medium and above fertile soil below 1500 meters above sea level in Guiyang City, Zunyi City, Qiandongnan Prefecture, Qiannan Prefecture, Tongren City, and Jinsha County of Bijie City in Guizhou Province. 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.