Question: In general, fertilizers are applied to crops by applying fertilizers to the soil and relying on the crop roots for absorption and utilization. Fertilizer spray to the crop is used under what circumstances? What problem can be solved?
Experts: Crops rely mainly on roots to absorb the nutrients they need from the soil. At the same time, non-rooted organs such as stems, leaves and seed coats of crops can also absorb and utilize nutrients. However, foliar fertilization outside the root is only an auxiliary way of crop fertilization and cannot replace root fertilization. Under normal circumstances, on the basis of soil fertilization, the use of foliar fertilizers to supplement crops with some medium and micronutrients or growth regulators is necessary to increase the yield and improve quality of crops, especially for fruit trees. Many cash crops. In some special circumstances, such as the reproductive growth stage at the later stage of development, the carbohydrates required for development are used in large quantities in fruits and other parts, resulting in decreased root activity and reduced nutrient absorption. This requires the application of leaf fertilization; In the case of drought in the topsoil and no irrigation conditions, the effective nutrient transport in the rhizosphere soil is poor, or the condition of the flood water in the disaster relief, the lack of oxygen in the root system of the crop, the normal absorption of nutrients, etc. . Therefore, crop leaf fertilization is often mainly used to solve two problems: one is the nutrient supply of trace elements, and the other is the supply of nutrients when the special disaster condition causes the root system to temporarily not absorb.
Q: Why is foliar spray fertilizer the main method of correcting trace element deficiency?
Experts: The demand for trace elements in plants is small. If the method of soil application is mainly adopted, due to the small amount of application and uneven application, a large number of application costs are high and the soil is fixed, which cannot be effectively absorbed and utilized by plants. The nutritive characteristics of trace elements are different from those of a large number of elements. For example, the tree of a fruit tree is tall, the transport process of trace elements from the root to the leaves is long, and the redistribution of leaves from the leaves to the fruit is also difficult. Therefore, the trace elements are only supplied from the roots. , can not meet the needs of plants. The application of trace elements to the fruit leaves is highly targeted and the supply speed is high. It can solve the problem of trace element deficiency directly, effectively and quickly.
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4-Hydroxy-Benzoy1,Arrhythmia Intermediates,Cas 52490-15-0
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