Fertilization and fertilization, with the popularization and application of greenhouse vegetables and fruit trees in the protected areas, there are many types of fertilization on the market, and farmers should apply the types of differences rationally. There are many types of fertilization fertilization, which can be divided into three types from chemical properties and nutrient composition: one is inorganic type such as urea, potassium dihydrogen phosphate, high calcium type, high potassium type, etc.; second is organic type, such as amino acid type , humic acid, marine organisms, etc.; third, microbial types, such as yeast strains. In recent years, the reconstituted fertilization varieties have developed rapidly and can basically be divided into two categories. One is a compound preparation that combines organic, inorganic, biological and other raw materials, scientifically processed and compounded, and the other is Organic and inorganic materials, scientifically formulated organic and inorganic liquids are compounded and fertilized. These new complex formulations can only be applied to one type of fertilizer to meet the needs of many elements of the crop. Scientific use of fertigation, must pay attention to the following points: First, we must correctly select fertilizer varieties. Fertilization is by no means so simple as “fertilizer with waterâ€. It must be selected according to different crops. For example, urea or ammonium nitrate can be used when planting more vegetable crops that require more nitrogen. Second, the method of use should be appropriate. Before the application of fertilization, the solidified fertilizer should be hydrolyzed to make a mother liquor, and then water should be added. For some crops such as shallow-cultivated vegetables or inconvenient soil fertilization, the prepared fertilizer can be flushed with water, and the amount of water must be controlled during the flushing process to ensure that the nutrients are evenly distributed in the ground; III. Fertilizer dosage and use concentration To be reasonable. Excessive use, high concentration, easy to produce ammonia, nitrogen oxides, hydrogen sulfide and other toxic and harmful gases, causing crop poisoning; avoid direct solid fertilization spread in the field, water irrigation, but cause uneven distribution of fertilizer, even Burning seedlings appear. After fertilization, combined with timely cultivation of loose soil, the effect is better. IV. Compound fertilization with types of microbial preparations should be stored in a cool place to avoid sun exposure and excessive hot flashes. Do not mix with fungicides. If agglomerated, it can be used continuously without affecting fertilizer efficiency. Transfusion Chair,Blood Transfusion Chair,Medical Transfusion Chair,Hospital Transfusion Chair jiangyin chenyi medical technology co.,ltd , https://www.chenyimed.com