Trace elements refer to nutrients with low content in soil and plants. At present, there are six kinds of iron, copper, zinc, manganese, molybdenum and boron which are mainly studied and used. Although trace elements are small in crops, they have strong specificity and are indispensable and irreplaceable for crop growth and development. Therefore, when the crop lacks any trace elements, growth and development are inhibited, resulting in reduced yield and quality, serious or even unacceptable. On the other hand, if there are too many of these elements, poisoning will occur, affecting crop yield and quality, and causing some local diseases in humans and animals.
Boron can promote the normal development of reproductive organs. An important symptom of boron deficiency is that the seeds cannot develop normally or even form, which affects the harvest of crops. Boron promotes the synthesis and transportation of sugar in crops. When borax is deficient, chloroplasts degrade and affect photosynthesis. Boron can increase the nitrogen fixation activity of leguminous rhizobium and increase the nitrogen fixation. In the absence of boron, the nodule is underdeveloped, affecting the amount of nitrogen fixation. Boron also enhances crop stress resistance.
Molybdenum is a nitrogen-fixing microorganism, especially when rhizobium symbiotic with legumes fixes atmospheric nitrogen. At the same time, it can enhance the photosynthesis intensity of the leaves. In the absence of molybdenum, the plants are short, the leaves are chlorotic, the leaves are scorched, and they curl inward, showing a wilting state.
Zinc can promote photosynthesis in crops, and crop growth and development are stagnant in the absence of zinc.
Plant chloroplasts contain manganese, which promotes seed germination and seedling growth. When manganese deficiency occurs, it affects photosynthesis, respiration, and accumulation of nitrate nitrogen in the body. It is characterized by chlorotic yellowing of the veins of the leaves, with brown spots, and gradually spread over the whole leaves, making the leaves turn red-gray and the leaves shrink.
Iron is indispensable for chlorophyll formation and is difficult to transfer in plants. Therefore, leaf "greenness" is a manifestation of plant iron deficiency, and this chlorosis first appears on young leaves. In addition, iron has an effect on photosynthesis and respiration of plants. In the absence of copper, the plant grows thin, the new leaves are yellow, withered and dry, the tip of the leaf is curled white and has necrotic spots.
Boron can promote the normal development of reproductive organs. An important symptom of boron deficiency is that the seeds cannot develop normally or even form, which affects the harvest of crops. Boron promotes the synthesis and transportation of sugar in crops. When borax is deficient, chloroplasts degrade and affect photosynthesis. Boron can increase the nitrogen fixation activity of leguminous rhizobium and increase the nitrogen fixation. In the absence of boron, the nodule is underdeveloped, affecting the amount of nitrogen fixation. Boron also enhances crop stress resistance.
Molybdenum is a nitrogen-fixing microorganism, especially when rhizobium symbiotic with legumes fixes atmospheric nitrogen. At the same time, it can enhance the photosynthesis intensity of the leaves. In the absence of molybdenum, the plants are short, the leaves are chlorotic, the leaves are scorched, and they curl inward, showing a wilting state.
Zinc can promote photosynthesis in crops, and crop growth and development are stagnant in the absence of zinc.
Plant chloroplasts contain manganese, which promotes seed germination and seedling growth. When manganese deficiency occurs, it affects photosynthesis, respiration, and accumulation of nitrate nitrogen in the body. It is characterized by chlorotic yellowing of the veins of the leaves, with brown spots, and gradually spread over the whole leaves, making the leaves turn red-gray and the leaves shrink.
Iron is indispensable for chlorophyll formation and is difficult to transfer in plants. Therefore, leaf "greenness" is a manifestation of plant iron deficiency, and this chlorosis first appears on young leaves. In addition, iron has an effect on photosynthesis and respiration of plants. In the absence of copper, the plant grows thin, the new leaves are yellow, withered and dry, the tip of the leaf is curled white and has necrotic spots.
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