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The method of distinguishing true and false of controlled re

发布时间：2021-06-08 发布者：admin 所属类别：COMPANY NEWS

The method of distinguishing true and false of controlled release fertilizer

The advantage of slow and controlled release fertilizer is that it can be applied at one time without top dressing, which can greatly save labor input, and at the same time, it can reduce the amount of chemical fertilizer used, which has huge ecological benefits. During the purchase process, how to identify genuine and fake slow-release fertilizers?

Slow and Controlled Release Fertilizer is usually used to control the release rate of nutrients by coating chemical fertilizer particles, so as to slow down the release rate of nutrients.As a result, the outer membrane of Slow and Controlled Release Fertilizer is often colored. At present, most of the slow and controlled release fertilizers on the market are mixed with common fertilizers, so that in the early stage of crop growth, the common fertilizer provides nutrients, and in the middle and late stage of growth, the slow and controlled release fertilizer mainly provides nutrients.

In view of the situation that some manufacturers deliberately dye ordinary fertilizers to pretend to be slow-controlled fertilization, you can put the fertilizer in water and soak, usually the dye will fade in the water, and the coating of qualified slow-release fertilizers will not fade.

After opening the slow and controlled release fertilizer packaging bag, you can randomly take 100 fertilizers and count the number of colored fertilizer particles. If the colored particles exceed 15, it means that the content of the slow and controlled release fertilizer reaches 15%, which is qualified. product. If it fails, it is not qualified.