Leying 8 18 is semi-compact, with plant height of 275cm and ear height of 103cm. Leaf sheaths of seedlings are purple, leaves are green, and purple an
Leying 8 18 is semi-compact, with plant height of 275cm and ear height of 103cm. Leaf sheaths of seedlings are purple, leaves are green, and purple anthers are highly sensitive to ear rot and moderately resistant to stem rot. The content of crude starch is 73.9% and lysine is 0.3%. It takes 126.7 days from emergence to maturity. The seed is yellow, half-horse-toothed, weighing 38.8 grams, and the spike is 20.2 cm long.
I. Features and characteristics
1. In the middle and early-maturing spring maize groups in East China and North China, Leying 8 18 takes 0.2 days from emergence to maturity 126.7 days, which is 0.2 days later than the control variety Ji Dan 27.
2. Leying 8 18 seedlings have purple leaf sheaths, green leaves, purple leaf margins, purple anthers and green glumes.
3. After inoculation and identification, this variety is resistant to stem rot, leaf spot, head smut and gray spot, and highly susceptible to ear rot. Grain bulk density was 772g/L, crude protein content 1 1.5 1%, crude fat content was 3.35%, and crude starch content was 73.9%.
4. Leying 8 18 is semi-compact, with a plant height of 275cm, a spike height of 103cm, a cylindrical spike, a spike length of 20.2cm, a spike row of 16- 18, a red spike axis, a half-horse-tooth yellow grain and a 100-grain weight of 38.8g g.
Second, the output performance
1 and leying 8 18 participated in the green channel regional test of middle-early maturity spring maize group in East China and North China on 20 18-20 19. The average yield per mu in two years was 743.9 kg, which was 4.39% higher than that of the control variety Ji Dan 27.
2. In the production test of 20 19, the average yield per mu of Leying 8 18 was 764.6 kg, which was 4.6% higher than that of the control Ji Dan 27.
Three. Key points of cultivation techniques
1. Soil: Leying 8 18 is planted in plots with medium fertility or above.
2. Sowing time: Sow in the adaptation area from late April to early May.
3. Planting density: 4000-4500 plants/mu.
4. Disease control: Pay attention to the control of late leaf spot, ear rot and head smut.
Four, suitable for planting areas
1, leying 8 18 are suitable for middle-early maturing spring corn area in eastern China, the second active temperate zone in Heilongjiang province, Yanbian prefecture in Jilin province, parts of baishan city, Tonghua city, eastern Jilin city, southern Zalantun city in Hulunbeier city in central and eastern Inner Mongolia, north-central Xing 'an League, central Zhalute banner in Tongliao city, north-central Chifeng city, Qian Shan city in Wulanchabu city and northern Hohhot city.
2. Leying 8 18 can also be planted in the middle-early maturing areas of Basha mountains and rivers in Zhangjiakou City, Hebei Province and the middle-early maturing areas in central and southern Chengde City, in the hilly areas of Datong City and Shuozhou City with an altitude of 900-100 m in central and northern Shanxi Province, and in the mountainous areas below 1800m in southern Ningxia. ..