Micro-fertilizer refers to an element with low content in soil and in crops, generally not more than one thousandth, such as 0.05% manganese , 0.02% iron . Crops have very little need for micro-fertilizers, but they are as important to crops as large amounts of elements and cannot be replaced.
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Insufficient supply of any available trace elements in the soil, crops have special symptoms, reduced yield, reduced quality, and even hopeless harvest. If adequate supply of soil available microelements, also blind administration, also can cause crop intoxication, poor growth, reduced yields. For example, the effective boron content per kilogram of soil is more than 3 to 5 grams, which is harmful to most crops and inhibits the absorption of nitrogen by crops. The copper content per kilogram of soil exceeds 200 milligrams, the wheat will die, more than 250 milligrams, and the rice will die. Each kilogram of soil contains 0.2 grams of molybdenum , and the grown grass is poisonous to livestock.
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The lack of trace elements in crops is mainly due to soil conditions and improper fertilization, which makes the trace elements in the soil ineffective form for crops. Therefore, the application of trace element fertilizers should avoid excessive contact with the soil. However, concentrated application can affect fertilizer efficiency and is prone to phytotoxicity. Therefore, seed treatment soaking or seed dressing and external spraying are often used in application techniques. Method, the effect is very good.
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The application of trace element fertilizers should be based on nitrogen, phosphorus and potassium fertilizers. At the same time, under different nitrogen, phosphorus and potassium levels, crops react differently to trace elements. Generally speaking, low-yield soils It is prone to the lack of trace elements. As the yield level of high-yield soils continues to increase, the demand for trace elements in crops will increase accordingly. Therefore, it is necessary to grasp the conditions and methods of application reasonably, scientifically and effectively, and pay attention to the following three points.
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It is necessary to see that different types of trace elements in different soils are different. Only by knowing which element is missing in the soil, it is effective to supplement the fertilizer. Such as boron deficiency, zinc deficiency, its boron content is less than 0.5 parts per million, zinc is less than one millionth of a fifth, it is a lack of micro-fertilizer. Before it is clarified, it can be applied in a large area and then applied in a large area. Never use it blindly.
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It is necessary to regard the application of different crops to different micro-fertilizer requirements. For example, rice requires silicon, garlic and onion require selenium, and spinach requires iron.
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It is necessary to apply micro-fertilizer in an appropriate amount as a base fertilizer. Boron per acre 100 to 200 grams, 100 to 150 grams, or Zn, or ferrous sulfate 100 to 250 grams, or 510 grams of copper sulfate, avoid indiscriminate. When fertilizing outside the root, zinc sulfate is 0.02% to 0.04% , and manganese fertilizer is 0.05% to 0.1% .
Isothiazolinones is composed of 5-chloro-2-methyl-4-thiazoline-3-ketone (CMI) and 2-methyl-4-thiazoline-3-ketone (MI). The bactericidal effect of Isothiazolinones is carried out through breaking the bond between bacteria and algae protein. When contacted with microbes, Isothiazolinones can quickly inhibit their growth, thus leading to death of these microbes. Isothiazolinones has strong inhibition and biocidal effects on ordinary bacteria, fungi and alga, and has many advantages such as high biocidal efficiency, good degradation, no residual, safety in operation, good compatibleness, good stabilization, low cost in operation.
Isothiazolinones can mix with chlorine and most cation, anion, and non-ionic surfactants. When used at high dosage, its biosludge stripping effect is excellent.
Isothiazolinones is a kind of fungicidal with properties of broad spectrum, high efficiency, low toxicity and non-oxidative, it is the ideal biocidal in industrial circulating cool water system and in wastewater treatment in oilfield, papermaking, pesticide, cutting oil, leather, detergent and cosmetics etc..
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