【Main Characters of Varieties】

Planting spring maize in Hunan Province, the growth period is 111.9 days, which is equivalent to the control Lin'ao No. 1. The seedling leaf sheath is green, the plant type is semi-compact, the plant height is 271.2 cm, the ear height is 122.3 cm, the number of leaves in the adult plant is 21-22, the ear is long and cylindrical, the ear length is 19.1 cm, the bald tip length is 0.8 cm, and the ear thickness is 5.1 cm , The number of rows per ear is 16.0, the number of rows per grain is 36.4 grains, the cob is white, the grains are dent-shaped, yellow, and the hundred-grain weight is 33.0 grams. The grain bulk weight is 731 g/L, the crude protein content is 9.69%, the crude fat content is 3.84%, the crude starch content is 69.58%, and the lysine content is 0.34%.

The whole growth period of Chongqing was 124.0 days, which was 0.3 days shorter than the control Yudan 8. The plant height is 265.0 cm, the ear height is 103.5 cm, the plant type is semi-compact; the number of leaves in the adult plant is about 20, and the filaments are light purple. The ears are long and tube-shaped, with yellow grains, horse-toothed, and white cobs. The ear length is 20.9 cm, the ear thickness is 5.4 cm, the number of ear rows is 17.5 rows, the number of rows is 36.9 grains, the hundred-grain weight is 34.5 grams, and the seed yield rate is 85.5%.

【Adaptability】

Participated in the regional test in Hunan Province in 2016, the average yield per mu was 517.2 kg, which was an increase of 4.9% over the control; the continued test in 2017, the average yield per mu was 509.4 kg, which was an increase of 11.9% over the control; the average yield per mu in the two-year regional test was 513.3 kg, which was an increase in yield over the control 8.4%. In the 2017 production test, the average yield per mu was 554.6 kg, an increase of 9.6% over the control. The field showed no empty stalks, lodging rate 0.4%, no inversion, large spot disease 1.0 grade, small spot disease 1.2 grade, sheath blight 1.8 grade, corn borer 1.0 grade, gray spot disease 1.0 grade, and stalk rot 1.0 grade.

Chongqing: In the one-year adaptability test in 2020, the average yield per mu at 7 points was 576.2 kg, an increase of 5.7% over the control Yudan 8. Resistance evaluation: resistance to large spot disease, small spot disease, stem rot, ear rot, and susceptibility to sheath blight.

【Main cultivation measures】

Sown in mid-March in southern Hunan, late March in central Hunan, and early April in northwestern Hunan, planting 3,200-3500 plants per mu. Apply enough base fertilizer, 2,000 kg farmyard manure per mu, 40 kg ternary compound fertilizer, 10-15 kg urea per mu from the four-leaf stage to the jointing stage, and the fertilizer and water management is mainly to promote. Control cutworms at the seedling stage and corn borers at the big bell-mouth stage.

Chongqing is suitable for spring planting, with a density of about 2800; 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 pests and diseases.

[Suitable area for planting]

It is suitable for spring corn planting in Hunan Province. It is planted in areas with medium and above fertile soil 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.