1, Zheng Dan 958
At present, the maize variety with the largest planting area in China. High and stable yield, good variety resistance, good fruit, drought resistance and high temperature resistance. It is suitable for planting and cultivation in Huanghuaihai summer maize area in China.
2. Agricultural University
Agricultural University 84 seedlings have strong vigor, dark green leaves and stout stems, and are resistant to lodging and drought. The grain is yellow, with good gloss, and the 1000-grain weight is 388 grams. Suitable for planting in northeast, north and southwest corn areas and Huang-Huai-Hai summer sowing areas.
3. denghai 605
Denghai 605 is a maize hybrid with independent intellectual property rights bred by Denghai Seed Industry. The yield per mu of this variety is 1000 kg, which is suitable for planting summer maize under the conditions of high yield and medium and high fertilizer and water.
4. Dika 5 17
Dika 5 17 is a new maize variety with middle and early maturity. The whole growth period from emergence to maturity in spring is 128 days in Huang-Huai-Hai area and 103 days in summer.
5. Vico 702
The representative variety of high-quality corn for both food and feed has particularly good yield characteristics, large ears and full fruits, and excellent comprehensive characteristics. It is suitable for planting in more than 80% corn producing areas in China, and can be planted in spring or summer.
6. Zhong Dan 909
The new high-yield maize variety has the characteristics of high and stable yield, density tolerance, lodging resistance, strong ecological adaptability, high seed yield, high harvest index, good seed setting and high bulk density. Suitable for summer planting in Henan, Shandong (except Binzhou), Shaanxi Guanzhong Irrigation District, Shanxi Yuncheng and northern Jiangsu.
7. Shan Jun 20
Early maturing and high yield maize hybrid. Compact and delicate plant type, good fruiting, good quality and strong comprehensive resistance. Suitable for planting in Huanghuaihai summer maize area.
8. Xianyu 355
This variety passed the examination and approval in 2006, belonging to common corn variety, with an average yield of 8692.5 kg/ha. Suitable for summer sowing in Shandong, Shaanxi, Henan, Hebei and Anhui.
9. Lianchuang 808
Hybrid maize varieties. Developed root system, strong stem toughness, lodging resistance, resistance to bacterial wilt, leaf spot, rust and other pests and diseases, the seed yield is as high as 90%. Suitable for summer sowing and planting in Beijing, Tianjin, Baoding, Hebei and its south, southwest Shanxi, Henan, Shandong and other places.
10, Nong Yu 76
Nong Yu 76 has large and uniform panicles, high temperature resistance, strong lodging resistance, long grains and good quality. It was popularized and utilized as a summer maize variety in suitable areas of Shandong Province, and the average yield per mu in production test in 2006 was 6 19.7 kg.
Technical Suggestions on Summer Maize Production in Huang-Huai-Hai Region;
First, adjust the layout and optimize the structure.
According to the market demand and local production practice, adjust and optimize the corn planting structure, develop silage corn and fresh corn according to local conditions, and carry out interplanting of corn with other crops (soybeans, peanuts, etc.). ).
Second, optimize improved varieties and select seeds.
Scientifically select improved maize varieties suitable for local planting, suitable maturity, strong resistance, wide resistance and high and stable yield. Varieties with early maturity and strong drought tolerance should be selected in the northern areas of the Yellow River, Huaihe River and Bohai Sea. Choose medium-ripe, rust-resistant and high-temperature resistant varieties in the south of Huang-Huai-Hai. For plots that harvest grain directly, we should choose varieties that are early-maturing, lodging-resistant, fast in dehydration and suitable for mechanical direct harvest of grain.
Buy high-quality coated seeds to ensure that the requirements of mechanical single-seed precision sowing are met.
Third, grab the time to sow early, and sow the whole seedling at one time.
Summer corn should be sown in time after the harvest of the previous crop, and the sowing should be completed before June 15 in the south-central part and June 20 in the north. Mechanical precision seeder should adopt 60 cm equal spacing direct seeding. When the soil moisture content is insufficient for sowing, it is necessary to irrigate the head in time to ensure that all seedlings are sown at one time.
Fourth, rational close planting and optimization of population.
Determine the suitable planting density according to the variety characteristics and production conditions. Generally, 4000-4500 seedlings are protected per mu, and the density of dense-tolerant varieties and high-yield fields is appropriately increased. For plots with high planting density and rapid growth and areas with frequent wind disasters, plant growth regulators can be sprayed as appropriate from jointing stage to small trumpet stage to improve the lodging resistance of plants and prevent lodging.
Five, prevention and control of pests and diseases, chemical weeding.
Strengthen the dynamic monitoring, prediction and early warning of corn pests and diseases, especially sudden, overfeeding and epidemic pests and diseases such as meadow moth, and carry out green prevention and control. Before the emergence of maize after sowing, chemical sealing weeding should be carried out in time, or suitable herbicides should be selected for weeding after seedling (three-leaf to five-leaf stage). Standardize the spraying time, method and dosage, avoid repeated spraying, missed spraying and phytotoxicity, and improve the weeding effect.
Six, scientific management, efficient fertilizer and water.
The application of nitrogen fertilizer, with a certain amount of potassium fertilizer and an appropriate amount of trace fertilizer, is the main way to return wheat straw to the field in the previous crop. Among them, 1/3 nitrogen fertilizer, all potassium fertilizer and micro-fertilizer were deeply applied along the sowing side, and the remaining 2/3 nitrogen fertilizer was deeply applied on the mechanical side (about 10 cm) around the small bell mouth stage. It can also be used for sowing and fertilizing in different places, and select high-quality special controlled release fertilizer for one-time deep application.
After fertilization, if the soil moisture is insufficient, it should be watered in time, and the integration of water and fertilizer should be promoted if conditions permit, so as to reduce the use of chemical fertilizer and improve the utilization efficiency of water and fertilizer.