Solutions to cotton fertilizer damage
First, let’s analyze the possible causes of cotton fertilizer damage:
1. When preparing soil for growing seedlings in cotton nutritious bowls, too much farmyard fertilizer or chemical fertilizer is applied to the soil to make some cotton seeds rotten or dead after sowing. The occurrence of burning roots and dead seedlings;
2. After the seedbed cotton emerges, excessive application of flushing fertilization will burn and scorch all two cotyledons of the cotton seedling;
3. When applying the base fertilizer before transplanting the cotton seedlings, some sprinkle chemical fertilizer into the furrow or apply chemical fertilizer into the pot hole. There is no fine soil between the root system of the bowl seedling and the fertilizer applied. Interval, the roots of cotton seedlings are in direct contact with chemical fertilizers after planting, and the roots and stems of cotton seedlings will turn brown or black after fertilizer damage. The cotton seedlings will be stiff and not grow, and the seedlings will die seriously;
4. Too much nitrogen fertilizers such as urea or ammonium bicarbonate are applied at the bud stage, or high-efficiency multi-element compound fertilizers are used too much. Fertilization does not pay attention to the cost and blindly seeks to build a high-yield cotton shelf. As a result, the cotton grows wildly and the line is closed prematurely. The severe shade of the cotton field caused serious occurrence of pests such as bugs, causing a large number of buds to fall off, especially in rainy years, this phenomenon is more common;
What to do about cotton fertilizer
5. At the blooming and boll stage, rush to spread urea before the heavy rain. After the rain, the urea dissolves quickly. The fertilizer concentration in the cotton field suddenly increases. After the rain, it turns clear. The evaporation of cotton leaves is large, and the water in the cotton plant is quickly produced. Reverse osmosis caused serious water loss, so that the lower stems and leaves of the cotton plant looked like burns, and the whole cotton plant died seriously and could no longer be saved.
Increasing fertilizer input is an effective measure to increase the nutrients in the cotton field, increase the soil's fertilization capacity, and improve the nutritional status of cotton. However, blind fertilization without science is a man-made disaster for cotton, which causes cotton production to decrease. The reduction in income is due to its own reasons. We should seriously sum up the experience and lessons, scientifically grasp the cotton fertilization technology, and obtain the best cotton planting benefits with the least investment.
The following methods can be used to solve cotton fertilizer damage:
First of all, fertilize according to the fertilizer requirement of cotton. Cotton requires less fertilizer in the early period, stable in the middle period, and more fertilizer in the later period. Therefore, the fertilization of cotton should be done by applying plantar fertilizer, rapid application of seedling fertilizer, steady application of bud fertilizer, severe application of flower and bell fertilizer, and general application of peach fertilizer.
Solutions to cotton fertilizer damage
Secondly, we must fertilize because of the sky, the ground and the seed. For example, to prevent premature aging of early-maturing varieties, adequate peach fertilizer should be applied, and the amount of potassium fertilizer should be increased for transgenic hybrid insect-resistant cotton, not less than 60 kg per mu. Apply less fertilizer to soil with high fertility, and increase organic fertilizer for soil with poor fertility. When the weather is dry, fertilize with moisture, adjust fertilizer with water, and pay attention to fertilization after rain when topdressing.
Third, it is necessary to calculate the cost and economical fertilization. The first is to pay attention to the input-output ratio. Taking 600 kg of seed cotton per mu as an example, the fertilizer input per mu should not exceed 300 yuan; the second is to apply the fertilizer deeply, not to apply the fertilizer to the soil surface, let it volatilize or lose, let alone Spread before rain, fertilization must not damage the root system; third, topdressing fertilizer should be applied in batches, and the amount of one time should not be too large. The prospect of controlled and slow-release fertilizer is good, and it can be gradually expanded on the basis of experiments and demonstrations; fourth is fertilization It must be closely integrated with chemical regulation, so that the limited fertilizer can be fully and evenly applied, so that the cotton presents a stable and high-yield plant type.
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