Since the application of organic fertilizer has a significant supplemental effect on soil iron, manganese, copper, and zinc, the lack of these elements in vegetables is not common, and excessive problems should be avoided. In addition, the demand for molybdenum is small, and the lack of molybdenum in vegetable garden soils is also less. Under normal circumstances, the demand for magnesium from vegetable crops is relatively small, but for fruit and vegetable vegetables, especially in open field cultivation, magnesium fertilizer is often more important. Magnesium sulphate is more effective than other forms, and it is more appropriate to use it as topdressing during the fruit's hypertrophy. In magnesium-deficient soils, the amount of magnesium applied can reach 20-30 kg per hectare. In fruit and vegetable cultivation, it is safer to apply a small amount of magnesium fertilizer before planting. In recent years, due to the long-term application of high-concentration non-sulfur-containing fertilizers, some crops that require more sulfur (such as soybeans, onions, garlic, etc.) have poor growth. Among the vegetables that have positive effects on sulfur fertilizer are cruciferous bulbous vegetables, onions and garlic, mung beans, and potatoes. Among them, rapeseed and allium crops have a high demand for sulfur. The application of sulfur fertilizer can increase the yield of rapeseed, and the oil content of rapeseed can be increased. The application of sulphur fertilizer to the onion crops can also increase its flavor. If sulfur deficiency is found during crop growth, fast-acting sulfur fertilizers such as ammonium sulfate can be used as topdressing or spraying. The most common deficiency in vegetables is the lack of calcium and boron deficiency. The problem of calcium is generally manifested in the quality of vegetables, such as the umbilical rot of fruits and vegetables such as tomatoes and peppers, the dried heart of cruciferous vegetables such as cabbage and lettuce, the black heart disease of celery, and the cavity of carrots. Scientific research shows that to solve the problem of calcium deficiency in vegetables, the transpiration rate can be increased by increasing the air circulation, such as artificially unfolding the leaves and adjusting the temperature and humidity. The most effective method is to supplement the calcium fertilizer by foliar spraying. It can be sprayed on the top and bottom of the inflorescence sufficiently 2 to 3 times during flowering, and it is best to spray the fruits directly on the fruit surface during the full fruit period. Calcium fertilizer is best used sugar alcohol chelated calcium, such as calcium mannitol, this calcium fertilizer can completely solve the calcium in the plant body movement is very slow. Boron is one of the most widely used trace elements in agricultural production in the world today. The main reason for the lack of boron in vegetables is that most crops have a high demand for boron, such as rape, celery, sugar beet, spinach, radish and other crops are highly sensitive to boron, and another reason is that boron and nitrate are as easy to rinse, In vegetable cultivation, especially in facility cultivation, the amount of irrigation is too large and soil soluble boron is easily lost. To solve the problem of boron deficiency in vegetables, the application of boron fertilizer is carried out. Before the sowing of the crops or the preparation of transplants, 3 kg of granular sodium borate pentahydrate is applied per hectare. Boron can also be added in the form of foliar spray, which is characterized by its effectiveness, economy, and safety. Since boron is the main transportation route in most vegetables is xylem, this type of vegetables should be sprayed during the period when the amount of boron is highest. The most effective spraying period is: Solanaceous vegetables are sprayed in the post-emergence and early flowering period. ~3 times; root vegetables are sprayed twice in the post-emergence period to the root growth period; cabbage vegetables are sprayed two or three times in the post-emergence, rosette, and early ball stage; leafy vegetables are sprayed during the post-emergence to the growing season. Apply 2 to 3 times. When symptoms of boron deficiency occur in the field, they should be sprayed 2 or 3 times as quickly as possible, each time between 5 and 7 days. Leaf spray recommended the use of water-soluble and high content of sodium octaborate salt or potassium octoborate, spray concentration of 800 to 1000 times. The concentration of crops at seedling stage can be reduced as appropriate, slightly higher in the late growth period, and boron poisoning should not be caused by exceeding the application concentration, resulting in loss of green leaves and flowers and leaves. Soft Ice Cream Machine,Ice Cream Machine,Ice Cream Maker,Soft Cream Machine Guangzhou New Power Catering Equipment Manufacturing Co.,Ltd , https://www.gznewpower.com
Compared with field crops, vegetables, especially vegetable plants, have higher economic benefits. Therefore, farmers often choose to grow vegetables in farmland with good soil fertility and irrigation conditions. This kind of soil itself generally does not have the problem of lack of trace elements. However, with the changes in crop cultivation types and yield levels, the demand for trace elements in crops has increased. Coupled with the large amount of organic and chemical fertilizers used by vegetables for a long time, the lack of trace elements in vegetable fields has become increasingly serious.