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The Difference Between Controlled Release Fertilizer, Slow Controlled Release Fertilizer, Slow Release Fertilizer And Lose Control Fertilizer
Jun 30, 2017

Controlled-release fertilizers includes two types: slow-release fertilizer and controlled release fertilizer, according to the difference of production process and application principle, slow-release fertilizer is mainly divided into four categories: resin coated controlled-release fertilizer, urea formaldehyde slow-release fertilizer, sulfur coated urea fertilizer, stabilized fertilizer.


The slow-release fertilizer, refers to a kind of fertilizer in which initial nutrient is slowly released through various regulatory mechanism to prolong the period of validity of the effective nutrient uptake by crops, and its nutrient is slow-released or control-released according to a given release rate and release period. The prominent feature is that its release rate and release period are organically integrated with the growth of crops, so that the effective utilization rate of fertilizer nutrients is increased by more than 30%.

I. From environmental point of view

(I) Slow release fertilizers slowed down the release rate of nutrients in fertilizers through chemical and biological factors. They were affected by soil pH, water content, soil type and precipitation during the release process.

(II) Controlled release fertilizers are coated with nutrients to the middle, releasing nutrients slowly through small holes. The coating technology is affected by the ground temperature and moisture, and the higher the temperature (high moisture content), the faster the nutrient will release.

II. From Release rate at each stage

(I) Slow-release fertilizer: Nutrient release is sometimes not consistent with crop nutrient requirements, and is greatly affected by the environment.

(II) Controlled release fertilizers can basically meet the nutritional requirements of crops.