Cotton topdressing has a coup

During the whole growth period, cotton needs obvious less than one less dynamic law, that is, the emergence of a seedling bud (May 1 to June 10) is less; the bud is blooming (June 10 to 7) On the 5th of the month, the fertilizer needs to increase rapidly; the flowering one (the July 5th to the end of August) needs the fertilizer to reach the highest peak; the vomiting harvest (after the end of August) is gradually reduced. According to the law of fertilizer demand in cotton life, the main points of cotton topdressing are determined:
Light, partial or no seedling cotton enters the growth period, the nutrient competition between the plants is fierce, and the weak seedlings are easy to compete for nutrients and appear to be bud and flowering. Therefore, cultivating strong seedlings is the basis of high yield. When the base a bar is sufficient and the emergence is uniform, the seedlings can be applied lightly or not; when the seedlings are high, short, strong, and weak, the short and weak seedlings should be biased, and the weakness is strong and the high yield is obtained.
After the buds of the buds and cotton are stabilized, the fruit branches begin to appear, and the amount of fertilizer needed to increase rapidly. The nitrogen fertilizer should be properly applied to supplement the shortage of nutrients. Pay attention to the time when applying nitrogen fertilizer, it should not be too early, it should be carried out in the Shenglei period.
Re-apply flower buds and fertilizer application time is 7 to 10 days after flowering, when a bell with a diameter of 2 cm or more is sitting in the lower part (July 15 to 20), and 10 to 15 kg of urea is applied to the lower part of the plant to promote the lower part of the plant. Peach grows.
In the first ten days of August, the cotton entered the boll opening stage, and the growth amount gradually weakened. In this period, the appropriate amount of topping fertilizer can serve the upper autumn peach, and at the same time, the quality of the autumn peach cotton can be improved. The grain of urea is 3 to 5 kilograms, and combined with pest control, it can be used for foliar spray fertilizer.
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