Type of fertilization and its use

With the widespread application of vegetables and fruit trees in greenhouses, there are many types of fertilizers on the market, and farmers should use different types of rational application.

There are many types of fertilization varieties, which can be divided into three types: chemical type and nutrient composition: inorganic type such as urea, potassium dihydrogen phosphate, high calcium type, high potassium type, etc.; second, organic type, such as amino acid type. , humic acid marine biotypes, etc.; third is the type of microorganisms, such as yeast type. In recent years, the compounding and fertilizing varieties have developed rapidly. They can be basically divided into two categories. One is a composite preparation that produces organic, inorganic, biological and other raw materials through scientific processing and compounding. The other is Organic and inorganic materials, scientifically formulated organic and inorganic liquids are compounded and fertilized. These new compounding formulations can be applied to a single crop to meet the needs of the crop for multiple elements.

Scientific use of fertilization must pay attention to the following points: First, we must correctly select the fertilizer variety. Rushing fertilization is not so simple as “fertilizer with water”. It must be selected according to different crops. For example, when planting vegetable crops with more nitrogen, urea or ammonium nitrate can be used. Second, the method should be used properly. Before applying the fertilization, the solidified fertilizer should be hydrated to make a mother liquor, and then water is applied. For some crops such as shallow ploughed vegetables, or when it is inconvenient to fertilize the soil, the prepared fertilizer can be applied with water. During the flushing process, the amount of water should be controlled to ensure that the nutrients are evenly distributed in the ground. 3. Fertilizer dosage and concentration Be reasonable. If the dosage is too large and the concentration is too high, it is easy to produce toxic and harmful gases such as ammonia, nitrogen oxides and hydrogen sulfide, which may cause crop poisoning. It is forbidden to directly apply solid fertilizer to the field, and watering and rushing, resulting in uneven distribution of fertilizer, even Burning seedlings appear. After the application of fertilizer and water, combined with timely cultivating loose soil, the effect is better. 4. Compound type fertilization with microbial preparation type should be kept in a cool place to avoid sun exposure and excessive hot flashes, and should not be mixed with fungicides. If it is agglomerated, it can continue to be used without affecting the fertilizer efficiency.
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