Relying on the natural circulation to supplement the trace elements has been unable to adapt to the needs of high-yield and stable production in modern agriculture, and it is an indispensable and important means to rationally supplement the imbalance caused by natural circulation. Dr. Zhang Shuqing of the Soil and Fertilizer Institute of the Chinese Academy of Agricultural Sciences reminded that the following problems must be paid attention to when applying the microelement fertilizer rationally.
According to the specific circumstances of the soil, soil testing and fertilization, targeted. Soil testing is the premise of fertilization. Doing a good job of land exploration is the basis of scientific fertilization. Whether microelement fertilizer is needed or not should be determined according to the degree of abundance of trace elements in the soil. Excessive application will not only cause fertilizer damage but also pollute the environment.
Focus on the sensitive elements of different plants. Different crops have different needs for various trace elements and their sensitivity is not the same. Such as rapeseed, soybean, peanut root crops and fruit trees, vegetables and other sensitive to boron; rice, corn is more sensitive to zinc deficiency, and poor response to manganese fertilizer; wheat is not sensitive to zinc deficiency, but sensitive to manganese fertilizer. Mastering the sensitive elements of different plants and prescribing the right medicine is the most economical method of fertilization.
According to the growth characteristics of crops, fertilize timely and appropriately. Timely fertilization means fertilizing crops at the time when they need the greatest amount of trace elements to produce the maximum effect.
Under normal circumstances, micro-fertilizer can be mixed with soil or ditch (bar) application; can also be seed treatment, such as the preparation of 0.05% ~ 0.1% of the solution seed dressing; transplanting crops can also be used trace element suspension Root sorghum treatment: late or seedling supplement fertilizer, can be formulated as a 0.05% to 0.5% solution of foliar spray.
Different fertilizers and different application methods have different application concentrations. At the same time, we must also pay attention to the fact that the sensitive elements needed for different crops are different, and scientific arrangements for rotation are an effective means to prevent the scarcity of certain trace elements.
In addition, in order to increase the efficiency of fertilizers, the amount of single fertilizer is becoming less and less, and there are more and more compound fertilizers containing multiple elements. However, existing compound fertilizer plants simply add the inorganic salts of various elements in proportion, completely ignoring the adverse reactions between the elements. Although a lot of trace elements have been added in this way, it is very rare to really absorb it for crops. In order to prevent adverse side reactions and antagonism among various elements, in addition to strict soil testing and fertilization, different all-element compound fertilizers should be formulated according to different crops, and trace elements should be chelated to effectively prevent mutual defects. Side reactions and antagonism, improve the utilization of trace elements, reduce the loss of fertilizer.
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