There is no difference between Zhongke 505 and Zhongke Emerald 505, which means Zhongke Emerald 505. This is the maize variety applied by Beijing Lianchuang Seed Industry Co., Ltd., the variety source is CT 1668×CT3354, which conforms to the national maize variety approval standard, and the approval number is Guo Shen Yu 20 176025. Zhongkeyu 505 maize plant is semi-compact, with purple leaf sheath at seedling stage, dark green leaves, light purple anthers, green glume, light purple filaments, tubular spikes, red spikes, yellow grains and half-horse teeth, which is suitable for planting in plots with medium fertility or above.

1. Is there a difference between Zhongke 505 and Zhongke Emerald 505?

1 and Zhongke 505 generally refer to Zhongke Emerald 505. This is a maize variety selected and applied by Beijing Lianchuang Seed Industry Co., Ltd., which was approved by the ninth meeting of the Third National Crop Variety Approval Committee on June 29, 2007.

2. Zhongke Yuyu 505 was bred from the maize variety CT 1668×CT3354 which met the national maize variety approval standard. After approval, the approval number is Guo Shenyu 20 176025 and the approval time is 20 17.

Second, the introduction of Zhongke Yu 505 varieties

1, characteristics

(1) Mid-maturing spring corn area in Northeast China: from emergence to maturity 132 days, equivalent to Xianyu 335. Seedling leaf sheath is purple, leaves are dark green, anthers are light purple and glume is green. The plant type is semi-compact, the plant height is 306 cm, the ear position is 120 cm, and the number of leaves is 19-2 1. Filaments are light purple, the ear is tubular, the ear is 20.5 cm long, the number of rows per ear is about 16, the ear axis is red, the seeds are yellow and half-toothed, and the weight of 100 grains is 37.6 grams. Inoculation identification: resistant to gray leaf spot, moderately resistant to stem rot, ear rot, susceptible to big leaf spot and head smut. Quality analysis: the grain bulk density is 753g/L, the crude protein content is 8.64%, the crude fat content is 3.46%, the crude starch content is 76.35%, and the lysine content is 0.29%.

(2) Spring corn areas in Northeast China and North China: 126 days from emergence to maturity, 2 days earlier than Zheng Dan 958. The seedling bud sheath is purple, the leaves are green, the glume is green and the anthers are purple. The plant type is semi-compact, the plant height is 287cm, the ear height is 1 12cm, and the number of leaves is 19-20. Filaments are light purple, with tubular spikes, the spike length is 19.9cm, the rows per spike are 14- 16, the spike axis is red, the grain color is yellow, and the 100-grain weight is 37.2g g. Inoculation identification shows that they are susceptible to leaf spot disease, high resistance to Fusarium stalk rot, resistance to Fusarium ear rot, and sensitive to silk black. Quality analysis: grain bulk density is 763g/L, crude protein content 10. 1%, crude fat content 3.36%, crude starch content 74.53%, lysine content 0.3 1%.

(3) Huanghuaihai Summer Maize Region: from emergence to maturity 103 days, earlier than Zheng Dan 958 1 day. Seedling leaf sheath is purple, leaf is green, leaf margin is green, anther is purple, glume is green. The plant type is semi-compact, the plant height is 274 cm, the ear position is 102 cm and the number of leaves per plant is 20-2 1. Filaments are light purple, with barrel spikes, spike length 17.7 cm, rows per spike 14- 16, red spike axis, yellow seeds, and 100-grain weight of 33.7 grams. Inoculation identification: resistance to leaf spot, ear rot, stem rot, Curvularia leaf spot, smut and rough dwarf. Quality analysis: the grain bulk density is 763g/L, the crude protein content is 9.88%, the crude fat content is 3. 1 1%, the crude starch content is 75.36%, and the lysine content is 0.34%.

2. Output performance

(1) 2014-2015 participated in the regional test of mid-maturing spring maize varieties in northeast China, and the average yield per mu for two years was 9 15.4 kg, which was 3.4% higher than that of the control; The production test in 20 16 years showed that the average yield per mu was 80 1.8 kg, which was 4.9% higher than that of the control Xianyu 335.

(2)20 15-20 16, participated in the regional trial of spring maize in East China and North China with the green channel, and the average yield per mu for two years was 8 14.3 kg, which was 8.4% higher than that of the control Zheng Dan 958; The production test in 20 16 years showed that the average yield per mu was 783.4 kg, which was 6.7% higher than that of the control Zheng Dan 958.

(3)20 14-20 15 participated in the regional trial of summer maize varieties in Huang-Huai-Hai area, with an average yield of 734.0 kg per mu in two years, an increase of 8.0% over the control; The production test of 20 16 showed that the average yield per mu was 676.8 kg, which was 5.4% higher than that of the control.

3. Key points of cultivation techniques

(1) Mid-maturing spring corn area in Northeast China: cultivate in plots with medium fertility or above, and sow in late April to early May, with a planting density of about 4,000 plants per mu. Pay attention to the prevention and control of leaf blight, head smut and lodging.

(2) Spring corn areas in East China and North China: Choose plots with moderate fertility and plant them from late April to early May, with a planting density of about 3,800 plants per mu. Pay attention to the control of leaf spot, gray spot and head smut.

(3) Huanghuaihai Summer Maize Region: Plant in plots with medium fertility or above, and sow in late May to mid-June, with a planting density of about 4,000 plants per mu. Pay attention to the prevention and control of stem rot, ear rot, Curvularia leaf spot, smut and rough dwarf disease.

4. Suitable planting range

(1) Mid-maturing spring corn area in Northeast China: The suitable planting range is the eastern mountainous area of Liaoning Province and parts of northern Liaoning Province, most areas of Jilin City, Baicheng City and Tonghua City, some areas of Liaoyuan City, Changchun City and Songyuan City, the first accumulated temperature zone in Heilongjiang Province, Wulanhaote City, Chifeng City, Tongliao City, Hohhot City, Baotou City, Bayannaoer City and Ordos City in Inner Mongolia.

(2) Spring corn areas in East China and North China: suitable planting areas are Beijing, Tianjin, northern Hebei, Chifeng, Tongliao, Shanxi, Liaoning and Jilin.

(3) Huanghuaihai Summer Corn Area: Suitable planting areas are Beijing, Tianjin, Baoding and Hebei, south of Shanxi, Henan, Shandong, Huaibei, Jiangsu, Huaibei, Anhui, Guanzhong Irrigation Area, Shaanxi and other places.