The growth and development of crops requires not only three kinds of nitrogen, phosphorus, and potassium, but also trace elements such as iron, copper, manganese, zinc, boron, molybdenum, and calcium. The application of trace fertilizer can generally increase crop yield by about 10%. In the application process, we must pay attention to fertilization technology can increase production.
First, different crops, different fertility to strictly control the amount of fertilization The role of micro-fertilizer and crop species closely. For example, zinc has a greater effect on rice and corn; boron has a greater effect on wheat and rapeseed. The soil and micro-fertilizer content and distribution of different soil fertility are also different. Generally, the plots with low organic fertilizer application are prone to lack of micro-fertilizer. Only a small amount of micro-fertilizer can meet the normal growth and development needs of the crop. The critical range of various trace fertilizers from lack to excess is very small, and there is a slight lack or excess, which will cause harm to crops. Therefore, the application amount of trace fertilizer should be strictly controlled according to the instructions.
Second, trace fertilizer and a large number of elemental fertilizer with the use of trace element fertilizers, although with nitrogen, phosphorus, potassium fertilizer is equally important, but in the production of crops on a large number of elemental fertilizers need to be more urgent, the need is also large. Therefore, the trace element fertilizer must be fully satisfied with a large number of elemental fertilizers in order to exert a significant increase in production.
Third, the lack of trace elements in various crops when the iron deficiency symptoms, the new yellow leaves, veins chlorosis, in severe cases, the entire yellow or white leaves; lack of copper, the young leaves wilt, white patches on the leaves, tassels Abnormal development; lack of manganese, the veins between the chlorosis, showing spots, tissue necrosis; zinc deficiency, the emergence of white seedlings, cloud fields; lack of boron, the flowering results are less or false, prolonged growth period; calcium deficiency When the leaves yellow, scorch or premature aging; lack of molybdenum, the new leaves deformed, scattered spots on the leaves. In order to prevent crop diseases, Daejeon should adopt crop rotations and organic fertilizers.
When applying micronutrients, we must also pay attention to improving the acidity and alkalinity of the soil. When spraying fertilizers out of roots, it must be noted that spraying is uniform. Only in this way can we effectively use the trace element fertilizers that are lacking and achieve high yields.
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