Nowadays, the wheat harvest is nearing the end and the sowing of summer corn begins immediately. In order to better serve the farmers, the farmers should be introduced to the problems that should be paid attention to when planting corn, for reference only. Due to the high temperature and high humidity during the whole growing season of summer corn, corn is vulnerable to multiple pests. Therefore, it is particularly important to improve the quality of sowing and cultivate good quality seedlings to lay a solid foundation for the entire growth period. The author believes that to improve the quality of sowing and ensure the healthy growth of corn, attention should be paid to the following issues during sowing: 1, do a good job in drying seed and seed dressing before sowing Before sowing, choose sunny and warm weather to spread the seed on the mat or cloth to increase the germination rate and germination rate, and kill the germs on the surface of the seeds. The purpose of the seed dressing is to prevent the underground pests and the planthopper, and 40% can be selected. Phoxim 100 ml plus 10% imidacloprid 20 g add water 1 kg mix 50 kg corn seed, mix and dry a little after sowing. 2, early sowing time and improve the sowing quality After the wheat is harvested, if the conditions permit, early seeding at the time of grab can prolong the growth period of the corn and increase the yield significantly. Emphasis on mechanical sowing, so that line spacing, sowing depth (depth 3 ~ 5 cm) consistent with the cover soil, falling seeds evenly, to ensure the quality of sowing, if sowing with seed fertilizer should pay attention to seed and fertilizer isolation, to prevent burning. 3, a good one kill, ensure weeding effect During the growth period of summer maize, high temperature and rainy season occur, and weeds can be excavated at any time. Once prevention and control are lost, it is easy to form grassland. Immediately after the corn has been sprayed with head water, select 48% Ding A Mixture or 42% of Yutianjing 125-170 ml/mu of water for 30-45 kg of spray. If large grass is used in the field, add 100 ml/mu of paraquat. In order to increase the efficiency of weed control and reduce the impact of high wheat bran and thick wheat straw, a complete killing of the medicinal film layer is necessary. The field spray must be reversed, and the mu water consumption should not be lower than 30-45 kg. 4, balanced fertilization According to the requirements of fertilizer and soil nutrient status of maize, combined with the predetermined output target and fertilizer utilization, the correct determination of the amount of fertilizer is an important issue to achieve high yield, stable production, and high efficiency of corn. 500 kg of corn grain per mu need to absorb pure nitrogen 15.5 kg, phosphorus pentoxide 7 ~ 8 kg, 14 kg of potassium oxide. Farmers with the habit of planting fertilizers should choose high-quality controlled-release fertilizers with nitrogen, phosphorus, and potassium contents of 22-10-14 or 22-8-14 of 30-40 kg/mu, and fertilizers and seeds should be separated by more than 8-10 cm. . If ordinary fertilizers such as diammonium phosphate and various kinds of high-quality compound fertilizers are selected, the compound fertilizers will not easily exceed 20 kg/mu with the seed fertilizer, especially the compound fertilizers with high nitrogen fertilizer content (more than 20% nitrogen content of compound fertilizers). Dosage should be strictly controlled to prevent burning accidents. 5, reasonable close planting According to the inspections in recent years, it has been found that some maize production areas have a high planting density, a small row spacing, and a maximum seedling density of 6,000 to 7,000 plants/mu. The high density tends to cause lodging, increased empty culm rate, and poor pollination resulting in a lack of baldness. Grain and other phenomena pose a relatively large threat to high-yield and stable production. Therefore, only by achieving close planting can high-yield production be achieved. Zhengdan 958, Yudan 20, Yudan 22, Gaoyou No. 1 and other highly resistant varieties, the density of retained seedlings should be controlled at 4000 to 4500 strains, and the maximum is not to exceed 5,000 strains. Great Wall 306, Shiyu No. 7, and Xiu The density of young plants such as Qing 73-1 is about 3800 to 4200, the maximum is no more than 4500, and the rare plant varieties such as Daiyu No.6 and Ludan 6003 are kept at a density of around 3000 to 3500. No more than 4000 strains, and the row spacing should be 60 cm, and the spacing should be determined according to the density. In addition, we should pay attention to comprehensive prevention and control of a variety of seedling pests and diseases. During the high temperature and rainy season of corn sowing, a variety of diseases and insect pests invade the seedlings, and attention should be paid to the prevention. From the corn seedlings, spraying imidacloprid (or acetamiprid) plus beta-cypermethrin plus carbendazim to prevent slugs, thrips, and sticky Insects and various diseases ensure that strong seedlings develop early. Hydrolyzed Sponge White Powder Sponge Chengdu Sino Tech company , https://www.cnherbfun.cn