【Main Characters of Varieties】
Sichuan: The growth period is 133.9 days. The color of the first sheath is light purple, the tip of the first leaf is round to spoon-shaped, the angle between the leaf and the stem is small, the color of the sheath is green, the number of first collaterals in the tassel, the angle between the principal axis of the tassel and the branches is large, the posture of the collaterals of the tassel Mildly curved, long tassels with long side branches above the main shaft length, the base color of the tassel glume is green, the color of the glume except the base is light purple, the color of anthers is light purple, the color of filaments is light purple, the ear shape is intermediate, the grain type is intermediate, The main color of the top of the grain is yellow, the color of the back of the grain is orange-yellow, the color of the cob glume is white, and the arrangement of the grains is straight. In the two-year regional test, the average plant height was 263.9cm, the ear height was 115.2cm, the ear length was 18.9cm, the ear thickness was 5.4cm, the bald tip was 0.6cm, the number of ear rows was 17.2, and the number of seeds in rows was 36.0. The hundred-grain weight is 33.5g, the seed yield rate is 83.5%, and the grain weight per ear is 187.7g. Grain bulk weight is 758g/L, crude protein is 8.87%, crude fat is 4.2%, starch is 73.6%, and lysine is 0.31%.
Chongqing: The whole growth period is 131.1 days, 0.5 days shorter than Yudan 8; the plant height is 248.9 cm, the ear height is 95.8 cm, the plant type is semi-compact, and the number of adult leaves is 19-20; the seedling sheath is purple and the leaf margin is green. The glumes are light purple, the anthers are light red, and the filaments are light red; the ears are tube-shaped, the grains are yellow, half-dented, and the cobs are white. The ear length is 21.6 cm, the ear thickness is 5.6 cm, the number of ear rows is 18-20, the number of rows is 41.3 grains, and the hundred-grain weight is 38 grams.
【Adaptability】
Sichuan: Participated in the regional test of the corn mountain group in Sichuan Province in 2016, with an average yield of 638.7 kg per mu, an increase of 12.5% compared to the control Quanyu No. 9, and an average yield of 585.9 kg per mu in the continued trial in 2017, an increase of 6.2% compared to the control Quanyu No. 9. The annual regional test average yield is 612.3 kg per mu, an increase of 9.4% compared to the control Quanyu No. 9. Participated in the production test in 2017, with an average yield of 640.4 kg per mu, an increase of 13.7% over the control Quanyu No. 9. The average rate of increase in production points during the two-year regional and production trials was 91%. After inoculation identification, it is moderately resistant to ear rot, large spot, susceptible to sheath blight, small spot, head smut, and highly susceptible to stem rot.
Chongqing: In the adaptability test in 2019, the average yield per mu at 10 points was 526.2 kg, which was an increase of 12.2% over the control Yudan 8. Resistance evaluation: resistance to large spot disease, small spot disease, sheath blight, stem rot, medium resistance to ear rot.
【Main cultivation measures】
Sichuan: Suitable for spring planting, about 3000 plants per mu (4000 plants in plateau areas) is appropriate. Strengthen field management and apply foot fertilizer. Pay attention to the prevention and control of pests and diseases.
Chongqing: Suitable for spring planting, with a density of about 3,000; fertilization and management are the same as general single-cross species, re-application of base fertilizer, timely application of jointing fertilizer, attacking ear fertilizer; timely control of diseases and insect pests.
[Suitable area for planting]
It is suitable for planting spring corn in mountainous areas of Sichuan Province. 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 Yunnan Province are planted between 1,000 and 2,000 meters above sea level. Planted in areas above 800 meters above sea level in Chongqing. It is planted in areas with medium and above fertile soils below 1,900 meters above sea level in Guiyang City, Qianxinan Prefecture, Anshun City, Bijie City and Liupanshui City in Guizhou Province.
