The content of zinc in crops is generally a few parts per hundred thousand to a few parts per million of dry matter weight. Although the content is very small, the effect is great. For example, “shrunk seedlings”, “stiff seedlings”, and “settle-sitting” in rice, “white bud disease” in corn, “small leaf disease” in citrus and other fruit trees, and “bronze disease” in tung trees are all related to the lack of zinc. . So today we will talk about the importance and use of the trace element zinc.
(1) The importance of zinc
1) Promote protein metabolism
Since zinc is a component of many enzymes in the protein synthesis process, if plants are deficient in zinc, the rate and content of protein synthesis will be hindered. The effect of zinc on plant protein metabolism is also affected by light intensity. Under different light intensity conditions, there are certain differences in the chloroplast protein content between normal and zinc-deficient plants. The chloroplast protein content of normal plants and zinc-deficient plants under low light is basically the same, while the chloroplast protein content of zinc-deficient plants under high light intensity is higher than that of normal plants. 56.8% fewer plants.
2) Promote plant growth and development
Zinc has a great influence on plant vegetative organs and fertilization. Like copper, it is a trace element with high content in plant seeds. The effect of zinc on plant vegetative organs is most prominent in rice and corn, which are the most sensitive to zinc deficiency. Zinc deficiency will significantly reduce the plant height and dry weight of stems and leaves of corn, and will also affect plant root growth.
3)Synthetic elements of enzymes
Plants are composed of countless cells, and the enzymes contained in the cells are important substances for the normal physiological activities of crops. Zinc is an important component of synthetic enzymes in crops. The lack of enzymes will slow down any reaction in crops and prevent normal physiological activities and the development of nutritional organs.
Zinc affects the physiological activities of plant photosynthesis, metabolism and the synthesis of nutrients by affecting the synthesis of various enzymes in plants. Therefore, zinc plays an extremely important role in the growth of crops, and its lack in plants will cause serious consequences.
(2) How to use zinc fertilizer
1) Add zinc fertilizer when applying base fertilizer
When applying base fertilizer to the soil before planting, the application of zinc fertilizer cannot be ignored. Apply 20 to 25 kilograms of zinc sulfate evenly to each hectare of land. Since zinc ions stay in the soil for a long time, zinc fertilizer does not need to be applied too frequently. Applying zinc fertilizer once every other year when applying base fertilizer can achieve good results.
2. Do not use together with phosphate fertilizers or pesticides
When applying zinc fertilizer, be careful not to use it together with phosphate fertilizer, because zinc and phosphorus have antagonistic effects. Using the two together will greatly reduce the application effect of the two fertilizers, so the two fertilizers cannot be mixed. If growers use pesticides to disinfect the seeds soon after applying zinc fertilizer to the seeds, the zinc element will not be absorbed and utilized by the seeds, which will cause the zinc fertilizer to lose its fertilizer effect and not play a good role in seed dressing. Zinc fertilizer should be used with dry soil or acidic fertilizers when applied to the soil. When using phosphate fertilizer to dress seeds, dissolve zinc sulfate in part of the water and soak the seeds in it.
Post time: Aug-13-2024
