Why is there such a big gap in the birth process of cotton?
From the earlier development of cotton, the first is that the former is mostly spring planting, and the other is not planted; the second is that the seedlings of cotton seedlings are seeded earlier, the management is better, and the young seedlings are transplanted; the third is the use of mulching. Fourth, timely fertilizer supply, drainage conditions are better.
From the analysis of the reasons for the late start of cotton, the first crop is full of wheat or rapeseed, after the harvest can be transplanted cotton, slow seedling period is longer; Second, the cotton field is not applied base fertilizer, cotton seedlings are malnourished; Third, the application of base fertilizer is excessive The roots of cotton were damaged. Fourth, the cotton fields with frequent rainy days and low groundwater levels were affected by seedlings. The misuse of herbicides killed both weeds and cotton seedlings.
If premature management of cotton cannot be followed up, it is extremely prone to premature aging. If the late-stage cotton does not contain measures, it will be difficult for cotton to increase production. Delays and premature senility are all obstacles to increase cotton production. Such typical cases have been numerous over the years. If there is a slight oversight in production, it will result in artificially reduced production. Therefore, in the current management of cotton production, we must focus on The following two measures are good.
First, correctly analyze the situation of the seedlings and establish the confidence to seize the high yield of cotton. Judging from the current situation of the seedlings, cotton seedlings that accounted for about 10% or more of the cotton seedlings account for about 20% to 30% of the late-stage cotton seedlings. Most of the cotton seedlings entered the budding period. Cotton has strong plasticity and strong compensation ability. It takes a long time to grow buds, increase flowers, and increase bells. It has a large space for maneuvering and there are many opportunities for transformation. In the face of the problem of premature aging of cotton, as long as it creates improved ecological conditions, the birth and transformation Speed ​​is completely controllable, and it is hopeful to seize the balance and increase production.
Second, scientific management of fertilizers promotes balanced growth. From June to September, there are abundant light and heat resources. The management of cotton fields should make full use of light and heat energy, scientifically use good fertilizer, improve photosynthetic efficiency, and promote cotton growth. The first is to classify topdressing by seedlings. For cotton that has been flowered, apply multiple compound fertilizers of no less than 15 kg per mu. For most cotton seedlings that are in budding stage, they must steadily apply head-on fertilizer, apply 1500 kg of organic manure or 50 kg of bio-organic compound fertilizer per hectare, apply 15 kg of potash fertilizer, and apply quick-acting boron to the roots. Fertilizer three times, to prevent flowers but not real; Second, we must do a good job of deep cultivator, high soil, security, mulch, anti-lodging, convenient irrigation and drainage; Third, pay attention to the late June to early July, it is the peak of cotton nutrition and reproductive growth Period, prevent the meeting with the release of fertilizer and water, use the retarded plant growth regulator diaminosamine or booster, regulate the stable plant shape, use 2~3 g of diaminos per acre or 8~12 ml , watering 30 kg spray. For late-onset cotton seedlings, in addition to appropriate topdressing of nitrogen fertilizers, seedlings should be promoted with accelerated plant growth regulators such as "802" or Tianfengsu and Baoyu.
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