【Main Characters of Varieties】

Hubei: The plant is semi-compact, with moderate plant and ear positions. The leaf sheath of the seedlings is purple, the number of adult leaves is about 20, the number of upper leaves is about 6, the number of tassel branches is about 12, the anthers are light purple, and the filaments are light purple. The ear is cone-shaped, bracts are better coated, the cob is white, the grain is yellow, and the horse tooth type. In the regional test, the plant height is 281.6 cm, the ear height is 121.5 cm, the empty stalk rate is 0.9%, the ear length is 17.5 cm, the ear thickness is 5.4 cm, the bald tip length is 0.8 cm, the number of ear rows is 17.1, the number of rows is 35.0, and the weight of 1000-grain is 307.3 grams. The seed yield rate from dry ears was 84.3%, and the growth period was 110.5 days. The quality is determined by the Cereal Quality Supervision, Inspection and Testing Center of the Ministry of Agriculture and Rural Affairs. The bulk density is 716 g/l, the crude protein (dry basis) content is 9.94%, the crude fat (dry basis) content is 4.27%, and the crude starch (dry basis) content is 72.81%.

Chongqing: This variety is a hybrid corn. The whole growth period was 122.3 days, which was 2.0 days shorter than the control Yudan 8. The plant height is 258.1 cm, the ear height is 103.1 cm, and the plant type is semi-compact; the number of leaves in the adult plant is about 19, the filament is purple; the ear is cone-shaped, the grain is yellow, dentate, and the cob is white. The ear length is 18.2 cm, the ear thickness is 5.2 cm, the bald tip is 0.2 cm, the number of ear rows is 17.4 rows, the number of rows is 35.8 grains, the hundred-grain weight is 31.7 grams, and the seed yield rate is 84.9%.

【Adaptability】

Hubei: Participated in the regional test of maize hills and plains in Hubei Province from 2017 to 2018. The average yield per mu in the two-year regional test was 640.83 kg, which was 5.34% higher than the control Yidan 629. Among them: In 2017, the yield per mu was 649.56 kg, which was an increase of 2.19% compared to Yidan 629; in 2018, the yield was 632.10 kg per mu, which was an increase of 8.77% compared with Yidan 629. The field large spot disease is grade 3, small spot disease is grade 3, rust disease is grade 3, and the diseased plant rate of stem rot is 1.5%. The field lodging (discount) rate is 1.7%.

Chongqing: In the one-year adaptability test in 2020, the average yield per mu at 7 points was 585.1 kg, an increase of 7.4% over the control Yudan 8. Resistance evaluation: resistance to small spot disease, ear rot, medium resistance to large spot disease, stem rot, and susceptibility to sheath blight.

【Main cultivation measures】

Hubei: 1. Plant timely and reasonably close planting. Sowing from late March to early April, planting about 3,200 plants per mu for single cropping. 2. Scientific fertilization. Apply plantar fertilizer and topdress the seedlings at the right time and in the right amount. 3. Strengthen field management. Pay attention to squatting seedlings, spraying growth regulators to control plant height, drought resistance and drainage, and prevention of lodging. 4. Prevent pests and diseases.

Chongqing: 1. Suitable for spring sowing, with a density of about 2800 plants; 2. Fertilization and management are the same as general single-cross species, re-applying base fertilizer, timely application of jointing fertilizer, and attacking ear fertilizer; 3. Timely control of pests and diseases.

[Suitable area for planting]

It is suitable for planting spring maize in the hilly and plain areas of Hubei Province. It is planted in hills, flat dams and low mountain areas at an altitude of 800 meters and below in Chongqing.

引种编号：渝备玉2020006
品种名称：康农玉868
品种来源：SCL05×FL11144
引 种 者：重庆大爱种业有限公司
育 种 者：湖北康农种业股份有限公司、华中农业大学
审定编号：鄂审玉2019008
特征特性：该品种属杂交玉米。全生育期122.3天，比对照渝单8号短2.0天。株高258.1厘米，穗位高103.1厘米，株型半紧凑；成株叶片数19片左右，花丝紫色；果穗锥型，籽粒黄色、马齿型，穗轴白色。穗长18.2厘米，穗粗5.2厘米，秃尖0.2厘米，穗行数17.4行，行粒数35.8粒，百粒重31.7克，出籽率84.9%。
产量表现：2020年一年适应性试验，7点平均亩产585.1千克，比对照渝单8号增产7.4%。
抗性评价：抗小斑病、穗腐病，中抗大斑病、茎腐病，感纹枯病。
栽培技术要点：1.适宜春播，密度为2800株左右；2.施肥和管理同一般单交种，重施底肥，适时施用拔节肥，猛攻穗肥；3.及时防治病虫害。
风险提示：应根据当地病虫情报预测预报情况及时防治病虫害。
引种适宜种植区域：适宜重庆市海拔800米及以下的丘陵、平坝、低山地区种植。
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