What are the main new high-yield corn seed varieties?
High-yield corn seed varieties
The main high-yield corn seed varieties are Longgao L2, Liangyu 99, Denghai 6702, Delinong 988, Zhongdan 909, Jundan 29 and Tunyu 808. Different corn varieties also have different requirements for the growing environment. Below we will give a brief description of the characteristics of these types of corn seeds.
1. Longgao L2
The high-yield corn variety Longgao L2 is known for yielding a ton of grain per mu (667 sq m) and for its iron-like stalks that resist lodging. Under good high-water and high-fertilizer conditions, Longgao L2 set a high-yield record of 32000 jin per hectare, which is praised by the industry.
The corn seed Longgao L2 was bred by the High-Yield Breeding Room of the Corn Research Institute of the Heilongjiang Academy of Agricultural Sciences and was approved by the Heilongjiang Provincial Variety Approval Committee in 2004. The approved name of this variety is Longgao L2, and the commercial name is Baoyu Longgao L2.
This corn variety has a wide adaptive range, with a growth period of about 122—127 days and an approved accumulated temperature of 2350°C. Under accumulated temperature conditions above 2500°C, it will achieve ideal dehydration effect and maturity, and it is suitable for planting in the first and second accumulated temperature zones of Heilongjiang Province. The seedling stage grows robustly, the plant height is about 2.8 m, the ear height is 95 cm, the leaves are held upright, the plant type is compact, the stalks are strong and do not lodge, and it matures with green stalks. It has good drought resistance and stress resistance, and is highly resistant to northern corn leaf blight, head smut, corn smut and bacterial wilt. The ear is cylindrical, with about 18 rows——22 rows, about 45 kernels per row, 100-kernel weight 35 g, dent corn kernels, orange-yellow, test weight 751 g, vitreous grain, and under appropriate cultivation conditions the yield can reach more than 1000 kg.
In high-yield fields, the average yield of Longgao L2 exceeds 30000 jin per shang, far exceeding varieties of the same maturity period, setting a high-yield record for corn in Heilongjiang Province. The commercial grain is vitreous grain, the grain quality is relatively hard, and the selling price is relatively high. The commercial grain is golden yellow in color and is suitable as a food raw material, feed and brewing raw material. This variety has aroused great enthusiasm among industry figures and farmers in various places.
2. Liangyu 99
[Approval Number] National Approval Corn 2012008.
Liangyu 99 is a density-tolerant variety. Its spring sowing growth period is about 135 days, plant height 270 cm, ear height 100 cm, and plant type compact. The ear is conical, ear length 400px, number of ear rows 16-18, kernels yellow, dent type, good quality, 100-kernel weight 36.5 g, red cob. Plant in plots with medium fertility or above. The suitable density for spring sowing is 4000-4500 plants per mu. The average yield per mu is 700 kg. It is suitable for planting in most late-maturing corn areas of Liaoning.
Liangyu 99 can be planted at high density, 4500--5000 plants per mu, with uniform ears, consistent inside and out, no empty stalks and no bare tips. It is highly resistant to lodging, with thick stems, and resistant to force 8 strong winds. It is highly resistant to bacterial wilt, head smut, rough dwarf disease and maize dwarf mosaic virus disease. The grain quality is good and the yield is high. The average yield per mu is 900 kg, and the high yield is more than 1100 kg, an increase of 15-20% over Zhengdan 958.
3. Denghai 6702
[Approval Number] National Approval Corn 2011009.
[Approval Opinion] This variety meets the national corn variety approval standards and has passed approval. It is suitable for summer sowing planting in Shandong, Baoding and areas south of it in Hebei, Henan (except Pingdingshan and Zhoukou), the Guanzhong irrigation area of Shaanxi (except Xianyang), northern Anhui, northern Jiangsu, and the Yuncheng area of Shanxi. Pay attention to preventing stalk rot. Use with caution in areas with high incidence of corn smut and curvularia leaf spot.
4. Delinong 988
[Approval Number] National Approval Corn 2011010.
[Approval Opinion] This variety meets the national corn variety approval standards and has passed approval. It is suitable for summer sowing planting in Shandong, Henan (except Zhengzhou and Zhoukou), Baoding and areas south of it in Hebei (except Shijiazhuang), northern Jiangsu, and the Guanzhong irrigation area of Shaanxi. Pay attention to preventing lodging. Use with caution in areas with high incidence of corn smut.
5. Zhongdan 909
[Approval Number] National Approval Corn 2011011.
[Approval Opinion] This variety meets the national corn variety approval standards and has passed approval. It is suitable for summer sowing planting in Henan, Baoding and areas south of it in Hebei, Shandong (except Binzhou), the Guanzhong irrigation area of Shaanxi, Yuncheng in Shanxi, northern Jiangsu, and northern Anhui (except Huaibei). Use with caution in areas with high incidence of corn smut.
6. Jundan 29
[Approval Number] National Approval Corn 2011012.
[Approval Opinion] This variety meets the national corn variety approval standards and has passed approval. It is suitable for summer sowing planting in Henan (except Nanyang and Zhoukou), Baoding and areas south of it in Hebei (except Shijiazhuang), Shandong (except Zaozhuang), Xianyang in Shaanxi, Yuncheng in Shanxi, northern Jiangsu, and the Fuyang area of Anhui. Pay attention to preventing lodging. Use with caution in areas with high incidence of corn smut.
7. Tunyu 808
[Approval Number] National Approval Corn 2011013.
[Approval Opinion] This variety meets the national corn variety approval standards and has passed approval. It is suitable for summer sowing planting in Henan, Baoding and areas south of it in Hebei (except Shijiazhuang), Shandong (except Yantai), the Guanzhong irrigation area of Shaanxi, and the Yuncheng area of Shanxi. Pay attention to preventing lodging.