Covid-19 Test,Sars-Cov-2 Test,Covid-19 Antigen Test,Covid-19 Igg Antibody Test Wuxi BioHermes Bio & Medical Technology Co., Ltd. , https://www.biohermesglobal.com
Principles and Measures of Fertilizing Green Vegetables
With the improvement of people's living standards, non-polluting, high-quality, highly nutritious green vegetables are becoming more and more popular among consumers. The production of green, pollution-free vegetables has become the development direction of vegetable production. The production of green vegetables should not only pay attention to the use of water and pesticides, but also have strict requirements on the types, amounts, and methods of fertilizers. First, the principle of fertilization in vegetable production, fertilizer pollution on vegetables, there are two ways, first, harmful toxic substances contained in fertilizers such as bacteria, parasite eggs, toxic gases, heavy metals, etc.; Second, the large number of nitrogen fertilizers caused Nitrate accumulates in vegetables. Therefore, the application of fertilizer in the production of green vegetables should adhere to the following principles: The main organic fertilizer, supplemented by other fertilizers; mainly base fertilizer, supplemented by top dressing; mainly multi-element compound fertilizer, supplemented by single element fertilizer. Second, fertilization types 1. Organic fertilizer: Organic fertilizer is the fertilizer of choice for producing green vegetables. It has the advantages of long-term fertilizer efficiency, stable fertilizer supply, and low fertilizer damage, such as compost, manure, biogas fertilizer, cake fertilizer, green manure, mud fertilizer, crop straw, etc. . 2. Fertilizers: The production of green vegetables is limited in principle by the application of chemical fertilizers, as it is really needed in the production process, and it must be applied scientifically. The fertilizers that can be used for green vegetable production include urea, diammonium phosphate, potassium sulfate fertilizer, calcium magnesium phosphate fertilizer, mineral potassium, and superphosphate. 3. Biological Bacterial Fertilizer: Biological Bacterial Fertilizer not only has the long-term effect of organic fertilizer but also has the immediate effect of chemical fertilizer, and can reduce the content of nitrate in vegetables, improve the quality of vegetables, and improve soil properties. Therefore, green vegetable production should actively promote the use of biological materials. Fertilizers, such as rhizobium fertilizers, phosphorus bacteria fertilizers, active potassium fertilizers, nitrogen-fixing bacteria fertilizers, silicate bacterial fertilizers, compound microorganisms, and humic acid fertilizers. 4. Inorganic mineral fertilizers: such as mineral potassium fertilizer, mineral phosphate fertilizer and so on. 5. Trace Element Fertilizer: Fertilizer mainly made of trace elements such as copper, iron, zinc, manganese and boron. Third, fertilization measures 1. Re-applied organic fertilizer, less application of chemical fertilizers: adequate organic fertilizer, can continue to provide nutrients throughout the growing period of vegetable demand, help improve the quality of vegetables. Crop straw and livestock and poultry manure should be added to the starter through high-temperature accumulation and fermentation, so that it can be fully cooked before applying it to the vegetable field. During the fermentation, fresh manure is put into a plastic bag to be stacked or loaded into a cylinder, hot water seal is added, and the mixture is naturally fermented at an environmental humidity of 15° C. or more, during the fermentation process and at 45° C. The addition of fast rot to the crop straw can be returned directly to the field, but after crushed, the rot fermentation effect is better. The method of heap rot is to add 1-2 kg of fast rot per 100 kg of crushed straw. After stacking, the surface is mud-sealed and generally becomes fat in about 20 days. 2. Reapplying basal fertilizer and applying less top dressing: Practice has proved that under the same basal fertilizer conditions, the greater the amount of topdressing fertilizer, the use of base fertilizer for green vegetable production, control of top dressing, generally 15 kg of pure nitrogen per mu, and 2/3 of basal fertilizer, 1 /3 for top dressing, deep. 3. Pay attention to the scientific application of chemical fertilizers: First, prohibit the application of nitrate nitrogen fertilizer. The second is to control the amount of chemical fertilizers. Generally, the amount of nitrogen applied per mu should be controlled within 15 kg of pure nitrogen. The third is to deepen and apply early. The general ammonia nitrogen fertilizer is applied to the soil below 6cm, and urea is applied to soil below l0cm. Early application is beneficial to the early and long-term growth of crops, prolonging fertilizer efficiency and reducing nitrate accumulation. Practice has proved that after certain applications of urea, it can also quickly improve fertilizer efficiency and reduce pollution in the short term. The processing method is: Take 1 part of urea, 8-10 parts of soil suitable for dry and wet, mix evenly and piling it in a dry room, cover the plastic film on the bottom, and get bored for 7-10 days to do the top dressing. The fourth is to cooperate with organic fertilizers and microbial fertilizers. 4. Fertilization varies from place to place, due to seedlings, and varies from season to season: different geology, different seedling conditions, different types of fertilization in different seasons, and methods of fertilization should be different. For low-fertilizer vegetable plots, nitrogen and organic fertilizers can be applied to fertility and fertility. Vegetable nitrogen fertilizer at the seedling stage helps the vegetables grow faster and longer. High temperatures in summer and autumn, and high activity of nitrate reductase are not conducive to the accumulation of nitrate. Nitrogen fertilizer may be applied in an appropriate amount. 5. Fertilization new method: 1 spray brown sugar (sugar) liquid. If 0.2%-0.3% of the brown sugar liquid is sprayed on the leafy vegetables, the leaves can be enlarged, the chlorophyll content can be increased, the disease resistance of the plants can be enhanced, and the yield can be increased by about 10%. Note that the concentration of sugar can not be too high, spray once every 5-7 days, usually spray 3-5 times; 2 leaves vinegar spray. The application of solanaceous vegetables after 1-2 days after colonization, spray 400 times rice vinegar solution every 5-7 days, and spray 3-5 times, can increase the yield of vegetables by 10%-20%. When vinegar is sprayed, it is usually carried out in the afternoon. It needs 40-50kg of vinegar per acre.