[Main traits of varieties]:

Chongqing: This variety is a mid-to-late hybrid corn. At a density of 3000 plants/mu in the regional test, the emergence to maturity was 122-141 days, with an average of 133 days, which was 3 days longer than the control Yudan 8. The first sheath is purple, the plant is semi-compact, the plant height is 276 cm, the ear height is 116 cm, the leaf color is dark green, the number of adult leaves is 21, the anthers are yellow, the glumes are purple, and the filaments are light purple. The ear length is 19.1 cm, the number of ear rows is 16-18, and the number of rows is 36.9 grains; the ear is cylindrical, the cob is white, the grain is yellow, and the grain is half-dented, and the hundred-grain weight is 34.1 grams. The grain weight is 730 g/L, crude protein is 8.96%, crude fat is 4.47%, crude starch is 72.16%, and lysine is 0.29%.

Sichuan: The average growth period is 138 days, which is one day later than the control Quanyu No.9.

[Adaptability]:

Chongqing: The average yield per mu in the two-year regional trials was 629.4 kg, an increase of 10.6% compared to the control Yudan No. 8, with a range of 560.8 to 711.2 kg per mu, and all the 11 test sites increased production every time. In the production test, the average yield per mu was 597.8 kg, an increase of 9.7% compared to the control Yudan 8, and the yield per mu varied from 535.1 to 693.8 kg, with 5 increases and 1 decrease in 6 pilots. Two years of manual inoculation identification, the variety is resistant to small spot and ear rot, medium to large spot, susceptible to sheath blight, and highly susceptible to stem rot.

Sichuan: In 2019, the 9 pilots had an average yield of 581.2 kg per mu, which was 10.5% higher than the control Quanyu No. 9, and the yield rate was 100%; the resistance identification by the Institute of Plant Protection, Sichuan Academy of Agricultural Sciences: resistance to large spot disease, small spot disease, Stalk rot, moderately resistant to head smut, gray spot, susceptible to sheath blight and ear rot.

[Main cultivation measures]:

It is advisable to sow and raise seedlings from late March to early April. The planting density is about 3,000 plants per mu. Pay attention to the prevention and control of stem rot and sheath blight.

[Suitable area for planting]:

It is suitable for planting in areas above 800 meters above sea level in Chongqing. The 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 are between 1,000 and 2,000 meters above sea level. Spring corn is planted in the mountainous area of Sichuan Province.