Why corn will suffer from fertilizer damage?
The following factors can cause corn damage:
1 Biurea exceeded. Urea is processed at high temperatures (133°C at atmospheric pressure) during the production melting process and produces biuret. Once the biuret content of the applied urea exceeds 2%, it is easy to produce toxic effects on crop seeds and seedlings.
In recent years, with the transformation of production processes, compound fertilizers are susceptible to biuret formation in the process of granulation processes such as high tower melting, oil cooling, and drum spraying. However, because national standards for compound fertilizers do not require the detection of biuret, many surface-appropriate compound fertilizers enter the market, which poses a potential threat to corn production.
2 fertilizer formula is irrational. In traditional compound fertilizer formulations, the nitrogen content is generally not more than 15%. At present, the content of nitrogen in some compound fertilizer formulations often exceeds 20%. Nitrogen content increased, the corresponding fertilization method should be changed (such as a corresponding reduction in the amount of fertilizer or fertilizer point away from the root of the crop, etc.), otherwise, the concentration is too high and easy to produce fertilizer damage, resulting in burning roots, rot.
3 The raw organic fertilizer is directly applied to the field. Without organic fertilizer applied to the soil without decomposition or decomposition, a large amount of organic acids and heat will be generated during the decomposition process, which can easily cause burning of roots.
4 corn seedling precipitation. The soil moisture in the soil layer is high, and the fertilizer dissolves quickly. With years of rotary tillage, the plough bottom layer becomes hard and shallow, the root growth is limited, and the local soil solution is always in a high concentration state, resulting in insufficient water supply and slow seedling growth. Caused by the body's back flow, the plant died of water loss. At the same time, due to the hard bottom layer of the soil plough, the chemical fertilizer dissolves and then slowly penetrates downwards, spreading horizontally above the plough bottom layer, so that the root system is exposed to high-concentration chemical fertilizer solutions, and burning seedlings are also prone to occur.
How are corn treated by fertilizers?
1 In most cases, irrigation fields can quickly reduce the damage.
2 For excessive fertilizer damage caused by excessive elements, such as excessive nitrogen, can be sprayed with appropriate plant growth regulators (such as dibenzylamine, paclobutrazol, etc.) to ease; if excess phosphorus can increase nitrogen, potassium, zinc and other Micro-fertilizer to adjust the reasonable proportion between elements.
3 The toxicity caused by the application of biuret over 1.5% of fertilizer can be mixed with trace fertilizers such as boron, molybdenum, and magnesium, and foliar fertilizers such as potassium dihydrogen phosphate or ammonium phosphate sprayed at a low concentration. Water is washed to reduce its concentration in the soil, thereby reducing the degree of damage.
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