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所谓缓控释肥,是指通过各种调控机制使其养分最初缓慢释放,延长作物对其有效养分吸收利用的有效期,使其养分按照设定的释放率和释放期缓慢或控制释放的肥料。突出特点是其释放率和释放期与作物生长规律有机结合,从而使肥料养分有效利用率提高30%以上。由于缓控释肥具有减少施肥量、节约化肥生产原料(煤、电、天然气)、提高肥料利用率、减少生态环境污染等优点,因此被看做肥料产业的发展方向。通常我们所说的缓控释肥料包括了缓释肥与控释肥两大类型,按照生产工艺和施肥原理的不同来分,缓控释肥主要分为四大类:树脂包膜控释肥、脲甲醛缓释肥、硫包衣尿素、稳定性肥料。本文将对缓控释肥主要四大类产品的使用和发展进行梳理。
The so-called controlled-release fertilizer, refers to a variety of regulatory mechanisms to make its first slow release of nutrients to extend the effective use of crops on its effective nutrient absorption and utilization, so that nutrients in accordance with the set release rate and release of slow or controlled release of fertilizer. Prominent feature is its release rate and release of organic growth and crop growth law, so that fertilizer and effective utilization of nutrients increased by 30%. Because controlled release fertilizer has the advantage of reducing the amount of fertilizer, saving raw materials for chemical fertilizer production (coal, electricity, natural gas), increasing fertilizer utilization and reducing ecological environment pollution, it is regarded as the development direction of fertilizer industry. Generally speaking, we said slow release fertilizer includes slow release fertilizer and controlled release fertilizer two types, according to the production process and the principle of fertilization points, controlled release fertilizer is divided into four categories: resin coated controlled release fertilizer , Urea formaldehyde slow release fertilizer, sulfur coated urea, stability fertilizer. This article will review the use and development of controlled release fertilizer main four categories of products to sort out.