In recent years, in the adjustment of crop planting structure, many farmers who planted cotton changed the old cotton fields that had been planted with cotton over the past years. This is because the cost of materialization of corn is lower and labor is less. However, in the field of maize production, the same is true for farmers who change corn. The level of planting benefits between households is very different. The difference is poor in corn variety selection, field management, and climate change. . According to the survey, although some farmers have planted spring corn and also planted summer corn, the income is not very satisfactory, and some even reduce production and income. The reason for the reduction was found, and some farmers found that there were obvious mistakes in fertilization. One was that the old cotton fields used more fertilization and less fertilization when they were replanted; the second was to apply nitrogen and phosphate fertilizers without applying potassium in order to save costs. Fertilizer. Therefore, the vegetative growth and reproductive growth of corn are insufficient. It has been observed that these corn plants grow slowly, the stems are slender, and the main body is dwarfed. The tips and edges of the middle and lower old leaves are yellowed and scorched; the internodes are shortened; the panicles and ears are small, the grain is not full, and the bald head is more. Starch content Low, poor quality, not only affect the output but also reduce the quality. In fields that are severely deficient in potassium, the old leaves in the lower part of the plant gradually lose their chlorosis and luster, and the tips of the leaves and the two edges of the plant become yellow, and then turn brown, dry, and necrotic. Less roots, from yellow to dark brown, absorption of fertilizer and water function decline, and then lose support to cause lodging. To this end, we must summarize the experience and lessons of fertilization in maize production, according to the law of demand for fertilizer in maize, do scientific fertilization, and formula fertilization. First of all, it is necessary to clarify the characteristics of corn requiring fertilizer. The growth period of maize is divided into seedling stage, panicle stage and flowering stage. The demand for nutrients in different growth stages is not the same. The required fertilizer is less before the 6-leaf stage, and the amount of fertilizer is required gradually during the tasselling stage and the ear silking stage. Increase. According to the determination of the agricultural scientific research department, for every 100 kg of corn grain produced, 2.5-4.0 kg of nitrogen, 1.1-1.4 kg of phosphorus pentoxide, and 3.2-5.5 kg of potassium oxide are required to be absorbed from the soil, and the ratio is 1:0.4:1.3. Among them, the ratio of required fertilizer for summer corn is 1:0.48:1.35. In terms of production, it is necessary to combine well with the actual soil and fertility and carefully formulate fertilization. Second, we must understand that the demand for potassium for corn is large and concentrated. According to studies, the demand for potassium at the early stage of maize growth is more urgent than that of nitrogen and phosphorus. At the three-leaf stage, the absorption of potassium is about 20%, and it is rapidly increased to 40% to 50% after jointing, and the potassium accumulation occurs during tasseling and silking. The absorption has reached 80% to 90%. The absorption of potassium after grain formation stops basically. Therefore, it is necessary to ensure the supply of potassium in stages and to prevent the blind application of potassium fertilizer according to this rule of potassium requirement. Third, rational application of potassium fertilizer. One is to apply 13-18 kg of potassium chloride or 15-20 kg of potassium sulfate per acre; the second is to promote the application of organic fertilizer and potash fertilizer as a base fertilizer, apply 40 kg of organic fertilizer per acre, and apply 10 kg of potash fertilizer; Partial application of nitrogen fertilizer, so that the imbalance of potassium and potassium, causing symptoms of potassium deficiency; Fourth, it is necessary to open the ditch, deep application, avoid blindly spread.
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Product specifications
Product name:
Color: Black, yellow, Black/yellow
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Aluminum Foil Anti Slip Tape
