According to the author's investigation in numerous cotton areas around the Spring Festival, the area of ​​cotton fields this year has shown a trend of resuming growth. Although the temperature is picking up slowly this spring, the preparation of the cotton fields is relatively slow, but the cotton seedling and seedling season is approaching. In order to make the cotton safe for planting, safe seedling cultivation and safe transplanting, the cotton must be safely planted in the process of planting and transplanting cotton. Fertilizer, safety use good fat.
Looking back at the situation of transplanting cotton seedlings in recent years, there are still some unsafe factors in the issue of fertilization. First, some farmers use excessive fertilizer on the seedbeds. Because the concentration of soil fertilizer solution is too large, the cotton seedlings will grow. Suppressed, some seedlings are well out, and the dead seedlings can be quickly burned. The second is the use of organic fertilizers that are not fully decomposed and the seeds of weeds are introduced. The weeds on the seedbed grow faster than the cotton seedlings and form grassy seedlings. Third, some use urea as seed bed fertilizer, urea contains a small amount of biuret, have adverse effects on the seed germination, seed poisoning is easy to rotten species without seedlings, or can only sprout a few injured cotton seedlings. The fourth is that the top dressing is made of red rice and fertilized fertilizer. If the fertilizer is not used according to the dose, it is also prone to burn cotton seedlings. Fifth, before transplanting cotton seedlings, the amount of base fertilizer in the cotton field is too large and too shallow, especially for high-content compound fertilizer. After a large amount of time, the cotton seedlings are not stiff after being planted. Sixth, there are some strong cotton seedlings. After topdressing, the topdressing urea is more than the usual amount of fertilizer. The young shoots of cotton are darkened from red, the true leaves are dark green, the cotyledons are withered, and the whole plant withered. Some mistakes in the fertilization mentioned above have occurred in various areas of the cotton area, often delaying the golden season of cotton production, resulting in difficulty in the implementation of the cotton field area and adding obstacles to the high cotton yield.
To this end, we must learn the lessons of fertilization in the sowing and transplanting of cotton seedlings and take corrective measures to ensure safe sowing, seedlings and seedlings, and strong seedlings.
Seedbed base fertilizer, fine and appropriate. The young plants of cotton seedlings are small, and the cotyledons contain certain nutrients. It is not necessary to use too much base fertilizer, but emphasizes the essence and the amount. First, the organic fertilizers produced by the farmers must be fully decomposed, and the remaining weeds should be removed; second, the selection of bio-organic fertilizer should not exceed 5 kg per 10 square meters; compound fertilizer should not exceed 1 kg; Decomposition of human excrement, to be applied 20 days in advance, plowing after application and mix well; Fourth, do not use urea for bed base fertilizer.
Daejeon Base Fertilizer, apply it early. At present, many cotton fields have not been ploughed to reserve cotton lines, preparation work is lagging behind, and the area of ​​rapeseed and wheat in the former cotton crops has been expanded. The time for applying base fertilizers is tight. Therefore, it is imperative to seize the deep-seated cotton reserves and combine deep-seated facilities. Base fertilizer; Second, after the receipt of rape, wheat rush to apply early base fertilizer; Third, the high content of compound fertilizer 30 to 40 kg per acre is appropriate, do not pay more than the base fertilizer.
Cotton seedlings are topped with light weight. The top-dressing fertilizer in cotton seedlings, whether in the seedbed or field transplanting, chase fertilization material most avoid excessive use once, because the cotton nutrient is small, the root is young, without a lot of fertilizer, fertilizer is too large, often will produce reverse osmosis, resulting in Cotton seedlings flow backwards, inhibiting development. The seedbeds should be dressed with decomposed feces or thin urea solution, and can be used with Shihui Manfeng and other active liquid fertilizers. The field transplanted cotton seedlings will be topped with new urea after the new leaves are developed. The amount per mu should not exceed 5 kg.
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