In autumn-sown crops, wheat needs to be applied with zinc fertilizer, rape must be fertilized, beans need to be applied with molybdenum, garlic must be applied with selenium, and potatoes need to be fertilized. Although they are applied in small amounts, they are essential. For example, the lack of boron in rapeseed will be “flowers and not realâ€, and the glutinous grains will increase; the radish will be hollow in the absence of boron; the cabbage will be deficient in boron, the stem will crack; the green manure lacks molybdenum, and the nodule grows poorly. The following methods can be used to apply micro-fertilizer, which can produce good yield and quality improvement effects for autumn-sown crops.
Strategy 1: The soaking method first dilutes the micro-fertilizer with water, then puts the seed into the micro-fertilizer solution, so that the seed absorbs the fertilizer liquid and expands, and the nutrient enters the seed with the water liquid. Therefore, during the soaking process, the seeds must be frequently turned over so that the seeds can evenly absorb the fertilizer. The commonly used soaking concentration and time are: molybdenum fertilizer is immersed in 0.05%-0.1% ammonium molybdate solution for 10-12 hours; boron fertilizer is immersed in 0.05% borax solution for 4-6 hours; zinc fertilizer is 0.05% zinc sulphate solution Dip for 12-24 hours; manganese fertilizer is immersed in 0.1% manganese sulfate solution for 8-12 hours; rare earth micro-fertilizer is immersed in 0.03%-0.1% rare earth nitrate for 10-12 hours. After the seeds are soaked, they can be sown after being dried and dried.
Strategy 2: The seed dressing method first dissolves the micro-fertilizer with a small amount of water, and prepares a high-concentration fertilizer solution, and then sprays the fertilizer liquid on the seed, while spraying and mixing, so that the surface of the seed is stained with a layer of fertilizer liquid. Generally, only 1-4 grams of micro-fertilizer is used per 0.5 kg of seed, and the seed can be sown after the seed is sucked and dried. If it is dry mix, it is necessary to mix the micro-fertilizer powder and the seeds thoroughly. The amount of seed dressing is generally 2-9 g of borax, 2-4 g of ammonium molybdate and 8-15 g of copper sulfate. 4-6 grams of zinc sulfate, 4-6 grams of copper sulfate, 2-4 grams of rare earth micro-fertilizer.
Strategy 3: Spraying the micro-fertilizer evenly on the leaf surface of the crop, and then feeding it to the various parts of the plant after being absorbed by the leaves. This is a commonly used fertilization method, which is economical and effective. The practice is: first dilute the relevant micro-fertilizer with water and then spray. Usually borax or boric acid is 0.1%-0.25%, ammonium molybdate is 0.05%-0.1%, copper sulfate is 0.01%-0.02%, manganese sulfate is 0.05%-0.1%, copper sulfate is 0.01%-0.02%, rare earth nitrate It is 0.03%-0.1%. The number of sprays is determined according to the length of the crop growth period. It is advisable to spray more sensitive crops and deficient soils. It is advisable to spray the stems and leaves with each spray. It is advisable to spray at dusk on sunny days to maximize the wet time of the fertilizer on the crop leaves and enhance the effect of fertilizer absorption. Finally, according to the needs, several kinds of micro-fertilizers are sprayed or mixed with other fertilizers and pesticides to achieve complementary fertilizers, mutual promotion, and labor-saving effects. However, it must be observed in a small amount before mixing, and there are no adverse reactions such as turbidity, sedimentation, and bubbling. If it is, it cannot be mixed to avoid waste and side effects.
Strategy 4: When the soil-casting autumn-sown crops are planted, 0.5-1.5 kg of micro-fertilizer and seeds are simultaneously planted into the seeding ditch. If the amount of soil is sufficient, it can be used for the whole growth period of the crop. The experiment shows that when the amount of micro-fertilizer is large, the micro-nutrient content in the plant is large. Because the micro-fertilizer is easily fixed by soil particles in the soil, the dosage is large and the investment is high, so it should be concentrated as much as possible to reduce the loss of soil in the season. The micro-fertilizer. In this way, not only the current season, but also for several years, still get better results. Therefore, the soil application method is suitable for farmers with better economic conditions and less labor.
Precautions The demand for trace elements in crops is small, and the range of micro-fertilizers from lack to application is quite narrow. Therefore, to prevent excessive dosage, pay attention to uniform application. Note the use with a large amount of elemental fertilizer. On the basis of satisfying the demand for a large number of elements in the crop, the micro-fertilizer can show a significant increase in yield. Pay attention to the extent to which various crops respond to micronutrient. If the same crop is planted year after year or only a single fertilizer containing a large amount of elements is applied, and the plot of organic fertilizer is not paid attention to, it is prone to trace element deficiency.
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