In addition to the basal fertilizer, greenhouse vegetable should be topdressed while growing. Fertilizer application is one of the more common methods. It is widely used by farmers because of its convenient application, fast absorption, and good fertilizer efficiency. Pay attention to the following points. 1 to use less volatile or less volatile fertilizer for ground flushing. The amount of ventilation in the shed is relatively small, and it is easy to accumulate harmful gases and harmful gas poisoning. Therefore, volatile fertilizers should not be used for ground flushing. 2. Appropriate method of application. When applying fertilization, the solid fertilizer should be dissolved into water in advance to be dissolved, and the mother liquor should be made. Then, it should be flushed with water (organic fertilizer should be applied for about 10 days in advance, and the supernatant should be flushed with water). Do not directly spread chemical fertilizers, and then water irrigation facilities, so as to avoid uneven fertilization, local concentration is too high, the phenomenon of burning root. 3. Fertilizer fertilizer concentration should be appropriate. The amount of water used for fertilization is generally large, and fertilizer is highly diluted when fertilized. If the amount of fertilizer is insufficient, if the fertilizer concentration is too low, the fertilizer efficiency will be poor, and the effect due to fertilizer will not be achieved. If the fertilizer is excessively large, or if the amount of water used for fertilizer application is insufficient, the concentration of fertilizer solution is too high, then the burned root is prone to occur. . For volatile fertilizers, when the concentration of fertilizer solution is too high, the amount of harmful gases that volatilize into the air is relatively increased, and the chance of harmful gas poisoning also increases. Generally speaking, when watering with the normal amount of water, the fertilization amount of the solid fertilizer can be fertilized at about 120% of the conventional surface fertilization amount. The fertilization amount of the liquid fertilizer is preferably slightly turbid after the fertilizer liquid is mixed into the water. . The special flush fertilizer sold on the market can be carried out according to the instructions. 4. The amount of water should be appropriate. Fertilization and fertilization should not be flooded to avoid or reduce the loss of nutrients in fertilizers. However, it is also not possible to use too little water, to prevent fertilizers from excessively high concentrations of fertilizers, and to cause surface salinization after long-term high-level fertilization. The specific watering amount should be determined according to the type of soil, the type of cultivated earthworms, and the cultivation period of the vegetables. The appropriate amount of water for watering, the water can wet the soil in the main distribution area of ​​the root. After watering, insert a wooden stick into the ground to check the wetness of the soil to determine the appropriate amount of water. 5. Pay attention to balanced fertilization. Some peasant friends have identified a fertilizer and used it as a “universal fertilizer.†This results in excessive use of a single nutrient, causing physiological disease in the vegetables. The correct method is based on the different growth and development stages of vegetables, balanced fertilization, alternating application of various fertilizers. 6. Pay attention to prevent gas after fertilization. If the greenhouse is closed for a long period of time, ventilation will not be noticed after fertilization, and the greenhouse will easily accumulate harmful gases, which will lead to gas damage to the vegetables. Therefore, in the cold season, care should be taken to avoid the use of unfamed chicken manure and fertilizers with high nitrogen content. Bioorganic fertilizers can be applied to strengthen the root system. In the event of gas damage, prompt remedial measures should be taken: First, timely soil loosening and ventilation should be strengthened so that harmful gases can be emitted out of the shed as soon as possible. Second, spraying planting cytokinins and other plant growth regulators to promote the damage of vegetables as soon as possible Restore growth. 7. Fertilization should not be commonly used. According to investigations, due to the excessive use of excessive fertilization and fertilization by some vegetable farmers, resulting in undesirable phenomena such as soil compaction, rooting, and wilting of vegetable crops in vegetable fields in greenhouses, in some places it has become a limiting factor constraining high yields and high quality and should cause a large number of vegetable farmers. Attention. Fertilizer fertilization usually uses water-soluble fertilizers, mainly nitrogen and potassium fertilizers, with low phosphorus content, trace elements such as calcium and magnesium are minimal, and some types of fertilization also contain humic acids. The effect of redistribution is limited to the soil surface, and with plastic film coverage, the temperature in the greenhouse is relatively high, and the surface roots are large in quantity. If low-temperature cold flows are encountered or some poor quality fertilizers are used, burning roots are often prone to occur, resulting in rot. One-sided use of large amounts of nitrogenous fertilizers and misuse of fertilized fertilizers will also lead to lengthy vegetables, reduced quality, reduced fertilizer use efficiency and exacerbated soil salinity in greenhouses. Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone Tetanus Shot,Tetanus Vaccine,Hepatitis B Injection,Hep B Vaccine FOSHAN PHARMA CO., LTD. , https://www.forepharm.com