As one of our main food crops, Corn is closely related to our life. How to scientifically grow corn and increase corn yield is an important issue at present. Therefore, how to plant corn and improve planting management technology according to the actual situation of the land is particularly important. 1. Land preparation 1.1 Select medium and superior fertility plots with deep and loose soil layers and strong water and fertilizer retention capacity. Maize is not strict with mouthwash, but from the perspective of soil nutrient, it is better to choose a legume crop, and it is better to choose a fertile mouthwash such as soybean, peanut or corn. The continuous cropping period of the same variety of corn does not exceed two years. According to the climatic characteristics of the spring drought in our county, it is necessary to turn the ground in time after the autumn harvest to eliminate the mites. After autumn, the water content of the soil is greater than that of the planer. The planer is larger than the stubble. The autumn land preparation is very important. In the spring, it is not recommended to plough up the land, which is not good for the protection. In the future, if it is possible to plough up, depending on the situation of the situation, it can be planted in a row. The important tasks of dryland soil cultivation are water storage and conservation, increasing precipitation retention rate and water use efficiency, and ensuring the moisture requirement for corn seed germination and growth. 1.2 application of base fertilizer and seed fertilizer Combine with the land preparation and apply 1500-2000 kg of high-quality and fully decomposed farmyard manure. Fertilizer is applied with 15-20 kg of diammonium phosphate and 5 kg of potassium sulfate; or 20-25 kg of ternary compound fertilizer. Apply 1-1.5 kg of zinc sulfate per mu. Second, the variety selection 2.1 Use high-yield varieties that have been approved and promoted, have suitable growth period, good quality and strong resistance. Requires anti-large, small spot disease, head smut, virus disease, etc. According to the climate characteristics of our county, the varieties in different growth stages should be selected in Lingshang and Lingxia areas: Lingshang should choose the rare or medium density varieties with effective accumulated temperature between 2700 and 2850 °C, and the effective accumulated temperature should be 2800 in Lingxia area. - Dilute or medium density varieties between 3000 °C. Specifically, the appropriate variety should be selected according to the planting area, planting habits, and soil fertility conditions. Due to the current chaotic seed market, it is recommended to purchase at a reputable and regular seed shop to avoid buying fake and inferior seeds and causing unnecessary losses. 2.2 Seed treatment Seed coating is a necessary measure to increase the emergence rate of corn and prevent underground pests. 15.5% Fokker suspending agent, seed coating according to the ratio of 1:35-45; for the serious smut of the smut, you can use the lychee seed dressing, 4 grams per kilogram of seed (by seed quantity 0.40- /0 seed dressing). Third, sowing 3.1 timely looting sowing When the temperature of 5-10 cm soil layer is stable at 8-10 °C, it is necessary to rush to sow, the time is generally in mid-April. In order to ensure normal maturity, the corn variety with long growth period will be planted on Jianchangling. In the first ten days of April, the seedlings will be robbed and planted to achieve Miaoqi, Miaoquan and Miaozhuang. Animal seeding can be done by ridges, mechanical sowing can be used for flat sowing, and the row spacing is 50-55 cm. The plant spacing depends on the density. High-fertility soil can also be planted in large rows or in a hollow manner, using strip or on-demand. 3.2 Seeding rate and planting density The seeding is 3-4 kilograms per acre, 2.5-3.5 kilograms per acre, and 1.5-2 kilograms in precision. Planting density varies depending on the variety, soil fertility, and planting method. The high-stalk, thin-plant, and large-ear type varieties range from 2,800 to 3,500 per mu; the dwarf, dense, and compact-type varieties range from 4000 to 5000 per mu. Fourth, field management 4.1 Seedling management (1) Chatian re-emergence should check the seedlings in time after the emergence of the corn. When the lack of seedlings is serious, it is necessary to replant in time. If it is not serious, you can use more nearby seedlings or transplanted seedlings. It is best to transplant the seedlings before the lactation period (two leaves and one heart). (2) Timely seedlings and seedlings. One seedling can be carried out at 4-5 leaves of the seedlings. If the seedlings are twice, the first time should be carried out at 3-4 leaves of the seedlings, and the second time at 4-5 leaves. 4.2 Management of earing stage and flowering stage (1) Topdressing determines the topdressing period and quantity based on soil conditions and the length of the corn. If the corn grows weakly, it should be chased and chased after the jointing; if the corn plant grows vigorously, it can be chased later and chased the panicle at the big bell. The amount of topdressing accounts for 70% of the total, and about 20-30 kg of urea can be recovered per mu. (2) Irrigation requires water from the jointing to the heading stage, especially in the heading and flowering stage. In case of drought, it should be irrigated in time. Management requires interlacing, assisted pollination, fertilization and irrigation, etc., depending on the specific circumstances. 4.3 cultivating and weeding After applying the stalk fertilizer or the attacking ear fertilizer, the cultivating and cultivating soil should be carried out immediately, which not only has the herbicidal effect, but also improves the fertilizer utilization rate. V. Pest Control 5.1 Prevention and control of underground pests Underground pests that harm corn include tigers, crickets, crickets, and golden worms. Measures such as ploughing and removing eggs and larvae on weeds can effectively reduce the occurrence of pests. When underground pests are seriously endangered, they can be applied to the soil with phoxim seed dressing or toxic soil. The amount of seed dressing is 2g of 50% emulsifiable concentrate per kg of seed; the application of toxic soil is 100g of 50% emulsifiable concentrate, 500g of water is added, and 20kg of fine dry soil is mixed. 5.2 Control corn borer In the cultivation management, the disease-resistant varieties were selected; the wintering host was treated, and before the middle of May, the straw and root mash of the main corn mash were sealed with 100 grams of Beauveria bassiana per cubic meter. Biological control: Trichogram bee is cast. Put 20,000 bees on the acre and put the bees in 1 time. The first time the bee was released around June 20, when the number of eggs dropped reached 1-2, the amount of bee was 8,000. The second time was 7-10 days after the first bee was released. The amount of bee placed on the acre is 12,000. Specific operation measures: put 4 bees per acre, put about 25 eggs per bee, 60-90 bees per parasitic egg, then tear the bee card to win the corresponding small piece, and use the toothpick and other things to mark the bee Printed on the back of the leaves in the middle of the corn plant. The time to cast Trichogram bee should be timely and accurate; prevent high temperature sun and rain; avoid stacking with irritant items such as pesticides and fertilizers, and do not use pesticides for three days before placing bees. 5.3 Control of armyworm Chemical control: 2.5% bromomethrin, 200-/0 pyrethroid 3000-4000 times Tibetan. 5% to Fuling EC or 2.5qo perfusin EC 2000 times liquid spray. Mowing eggs: According to the habit of laying eggs on the dry leaves of adults, various grass handles (grass, straw, and corn leaves) are placed in the field to induce moths to lay eggs, and the eggs are eliminated. Sixth, harvest Corn is generally harvested during the ripening period. When the leaves at the base of the plant turn yellow, the leaves are yellowish white and loose, and the grains become hard and have an inherent grain shape and grain color. When the corn black cap layer is formed, it should be harvested in time. It is necessary to dry in time after harvesting. Seaweed Jiangsu Tiankang Food Co., Ltd. , https://www.tiankangfood.com
