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Maize is an important field crop in China and plays an important role in China's crop production. However, during corn planting, lodging is an important factor affecting corn yield. This article will introduce how to prevent corn lodging and disease.
1. Timely supplementation of quick-acting fertilizer : Corn is in the period from the big bell to the heading stage, which is the key period for corn growth. For example, the absorption capacity of corn roots is reduced, and the quick-acting nitrogen fertilizer such as urea should be appropriately added to promote the growth and development of corn. . The plot of land with a yield of about 500 kg per mu can be applied with 15-20 kg of urea per acre and about 10 kg of potassium sulfate. Fertilization should be carried out by ditching or using mechanical sputum to avoid spreading. It is necessary to prevent premature aging of corn early, and apply about 7.5 kg of urea per mu in the grain filling period.
2. Grasp the drainage and diversify : increase the drainage and diversification of the shovel, clear the main road of drainage, increase the amount of flood discharge, dredge the drainage ditch, organize farmers to ditch into the ground, and assault the water in the field. The land with no clear water grasps the favorable timing of the intermittent rainfall period, carries out the ploughing and digging, reduces the humidity in the field, enhances the permeability of the soil, and improves the rhizosphere environment of the crop.
3, to prevent lodging : in the land that is prone to lodging, you can take measures such as cultivating and cultivating soil to promote the development of aerial roots, increase the application of potassium fertilizer, remove weak plants to improve the population structure, and improve the lodging resistance of plants. For plants that have fallen, the plants can be straightened as appropriate, and the soil around the base is compacted.
4, do a good job of pest and disease prevention and control: focus on prevention and control of sticky insects, corn borer, aphids and other pests and brown spot, large spot disease, rust and other diseases. The armyworm can be sprayed with 50% phoxim 1000 times solution. Ear worms such as corn borer can be controlled by 90% trichlorfon 800 times droplets. Corn gluten can be sprayed with 50% chlorpyrifos 8-10 grams per acre or 10% imidacloprid 10-15 grams per acre plus 45 kilograms of water spray. Brown spot, large spot disease, Curvularia leaf spot can be sprayed with 50% carbendazim 500 times solution, and rust can be controlled by spraying 20% ​​of rusting emulsifiable concentrate with 75-100 ml per acre.
5. Do a good job of artificially assisted pollination : pay close attention to the pollination situation of corn and take timely measures. High-yield research can be used for artificial emasculation and supplementary pollination. In the case of continuous rain or extreme high temperature during the flowering and pollination of the field corn, it is necessary to take remedial measures such as artificial supplementary pollination to effectively increase the seed setting rate and strive to increase the number of grains per ear.
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