Five points for attention in applying trace element fertilizer

Trace elements include boron, zinc, molybdenum, iron, manganese, copper and other nutrient elements. Although plants need very few trace elements, their effects on plant growth and development are as important as large amounts of elements. When certain trace elements are deficient, the growth and development of crops will be significantly affected, the yield will decrease and the quality will decline. On the other hand, too many trace elements will cause crop poisoning, slightly affect the yield and quality, and even endanger the health of human beings and animals. In order to improve fertilizer efficiency and reduce damage, special attention should be paid to the following when applying micro-fertilizer: 1. According to the abundance and deficiency of trace elements in the soil, we should not apply it blindly or excessively. The amount of trace elements needed by crops is very small, and the concentration range of many trace elements from lack to appropriate amount is very narrow. therefore, the application of trace element fertilizer should be strictly controlled to prevent excessive concentration, and attention must be paid to uniformity. Trace element fertilizer can also be mixed with organic fertilizer. 2. According to the acidity and alkalinity of the soil. When the soil pH is too high, it will reduce the availability of zinc, iron, boron, manganese, copper and other elements in the soil, while in acidic soil, it will often cause crops to lack molybdenum. Therefore, micronutrient fertilizer should be applied pertinently according to the pH of the soil. 3. Choose to apply according to the response of crops to trace elements. All kinds of crops have different responses to different trace elements, the degree of sensitivity is different, the requirement is also different, and the application effect is obviously different, such as the effect of zinc fertilizer on corn is better, rape is sensitive to boron, gramineous crops are sensitive to manganese, legume crops are sensitive to molybdenum and boron. Therefore, it is necessary to select and apply reasonably according to the sensitivity and fertilizer effect of different crops to different trace elements. 4. supplement the corresponding trace elements according to the weather conditions. Temperature and rainfall will affect the release of trace elements in the soil and the absorption of them by crops. For example, when there is a low temperature in early spring, early rice is prone to zinc deficiency; drought in winter will affect the absorption of boron by roots; areas with more rainfall, especially coarse soil, are easy to cause leaching of iron, boron and molybdenum in soil. will promote crops to produce iron deficiency, boron deficiency, molybdenum deficiency. Therefore, according to the weather conditions to supplement the corresponding trace elements. 5. Pay attention to the combined application with a large number of element fertilizers and organic fertilizers. Only on the premise of meeting the needs of crops for a large number of elements such as nitrogen, phosphorus and potassium, trace element fertilizer can show obvious yield-increasing effect. Organic fertilizer contains a variety of trace elements, which can not be ignored as an important nutrient supply source to maintain soil trace element fertility. The application of organic fertilizer can adjust the soil environmental conditions and improve the availability of trace elements.