Recently, the author went to some cotton-producing counties and cities to investigate, and the preparation of cotton seedlings for nutrition was relatively slow. From the perspective of cotton farmers, first, how much cotton is planted this year has not yet been fully decided, and how many seedbeds have not yet been determined; second, there is not enough attention to improving the quality of seed beds; and third, there is still time for planting seedlings. Therefore, some farmers have not set aside cotton seedbeds, some have left their seedbeds unfinished, and some farmers are still preparing to trim, prepare soil, fertilize and sow. This status quo shows that the basic work of this year's cotton seedling nursery is still relatively weak. In order to improve the quality of cotton seedlings, seed beds must be prepared with high standards and high quality. Second, we must thoroughly deepen the bed soil. The address of the seedbed should be selected from the sunny side of the shelter, energy irrigation, and convenient transportation. The seedbed should be replaced every year, and old seedbeds should not be used to reduce the invasion of germs. Bed soil should be deep-turned 20 to 30 centimeters in order to fully mature, and weeds, eggs, cockroaches turned exposed, so that the temperature will be frostbite to death. Before seeding, the seedbed should be finely sorted twice, so that it can be used as a virtual reality. Third, we must rationally formulate fertilizers. The nutritional nursery bed, as its name implies, is to be rich in nutrition, scientific formula, timely fertilizer, and bred to grow early and strong. According to local experience, generally one month before sowing, the perennial seedbed should be rid of 10 to 15 tons of manure, 25 kg of phosphate fertilizer, 10 kg of potash, or about 25 kg of compound fertilizer. To grab the sensation, fertilize and trim the seedbed so that it can evenly mix and improve the performance of keeping fertilizer and water. Do not use urea as a base fertilizer before sowing to prevent the biuret in it from causing bad seedlings. Fourth, disaster preparedness is ready for earth. If the best sowing season has already arrived and the continuous rainy weather is difficult to plant as scheduled, it will delay agricultural time. In this regard, the way to adapt is to catch the fine weather, first use the old plastic film to cover the prepared nutritious bauxite, to prevent the rain from getting wet, and the rain can be planted on time. And to open the ditch around the seedbed to filter water, so that the ditch can be lifted, and you can do it in the rain, and strive for time, as early as possible seedlings.
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First, we must reserve the area of ​​seedbeds. How much seedbed area to stay, one depends on the plan to grow cotton fields, the second depends on the density of cotton fields, and the third depends on the size of the nutrition bowl. There are three types of nutrient pods: large, medium, and small. The diameter of the big quail is 7 to 8 cm, the diameter of the medlar is 5 to 6 cm, and the diameter of the small pod is 4 to 5 cm. There are about 250 square meters per square meter, about 400 square meters per square meter, and about 600 per square meter. At present, the cotton varieties are mostly based on genetically modified hybrid insect-resistant cotton, with a density of 1500 per acre, removing 20% ​​to 30% of ready-made cotton seedlings. About 6 m2 per acre will require a seedbed, and about 4 m2 per acre will be needed for a small seedling. 