During the period of vigorous growth of various crops, it is also a period of heavy fertilizer demand. Incorrect fertilization methods will cause fertilizer damage and increase production costs. Five correct and reasonable fertilization methods are now introduced to farmers' friends for reference.
1. The general fertilization should be grasped: organic fertilizer is the main factor, supplemented by chemical fertilizer; base fertilizer is applied, reasonable topdressing, scientific formula, balanced fertilization.
2. Shallow application or surface application of fertilizer. The fertilizer is volatile, lost or difficult to reach the root of the crop, which is not conducive to crop absorption, resulting in waste of fertilizer and low utilization rate. Fertilizer should be applied to seeds or crops 15-26 cm.
3. Improper fertilization of crops can cause fat damage, burning seedlings, and plant wilting. If the fertilizer is directly applied to the pepper and corn stems, the fertilizer must be 8-15 cm away from the crop; otherwise, the phenomenon of burning will occur. If the application of chemical fertilizers is insufficient or the soil moisture is insufficient after fertilization, the concentration of soil solution will be too high, the roots of the crops will be difficult to be absorbed, and the plants will be wilted or even dead. The nitrogen fertilizer will be excessive, and there will be a large amount of ammonia or ammonia ions in the soil. In terms of ammonia volatilization, in the presence of dew drops in the air, alkaline beads are formed, burn crops, causing scorch spots on the leaves. On the other hand, ammonia ions are easily nitrated on dry soil and converted to nitrosamines under the action of nitrosating bacteria. Gasification produces two itchy sputum gas poisoning crops.
4, excessive use of certain nutrients or partial application of nitrogen fertilizer, not only will produce poison, but also hinder the absorption of other nutrients by the crop, causing deficiency syndrome; partial application of nitrogen fertilizer will lead to crop growth and low disease resistance The seed setting rate has dropped.
5. Unfertilized manure and manure should not be directly applied to vegetables. Fresh manure and feces contain a large number of pathogens, toxins and parasite eggs. If they are not directly applied, they will contaminate vegetables and spread diseases. It can be applied after filial piety or harmless treatment. Unfertilized human and animal manure will produce a lot of harmful gases such as hydrogen sulfide in the process of decay. It is easy to make vegetable seeds itch and suffocate, and at the same time produce a lot of calories, easy to make vegetables. Seed burning or root rot is not conducive to seed germination.
A digital scale is an electronic device used to measure the weight of an object or substance. It has a digital display screen that shows the weight in either metric or imperial units, such as grams, ounces, pounds or kilograms. Digital scales are commonly used in kitchens, laboratories, and for weighing small items such as jewelry or medication. They are more accurate than traditional mechanical scales and often have additional features such as tare function, automatic shut-off, and calibration.
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