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Slow-release Nitrogen Fertilizers in Vegetable Production: A Review

机译：蔬菜生产中的缓释氮肥研究进展

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摘要

Slow-release nitrogen (N) fertilizers offer mail), potential benefits for vegetable production. In sand), soils, their use may lessen N leaching. If the slow-release fertilizer has a release pattern that matches crop needs, N uptake by the growing crop may become more efficient. Additionally, if slow-release fertilizers can be applied as a preplant application, production costs could be lessened, eliminating the need for multiple applications of soluble N fertilizer. Synthetic slow-release fertilizers can be separated into two general groups: those that are slow release as a byproduct of a chemical reaction (such as urea-formaldehyde), and those that are slow release via a sulfur, wax, or resin coating around the fertilizer prill. In vegetable crop research, much of the available literature has focused on use of sulfur coat urea and urea-formaldehyde, as they have been in the fertilizer market for 40 years. Newer research has evaluated resin-coated products. In most studies, use of slow-release N fertilizers as a preplant treatment did not decrease crop yield, but yield was rarely increased when compared with standard split applications of soluble N. Based on available research, the benefits of using slow-release N fertilizers in vegetable crop production will come from reduced environmental risk and savings in production costs.
机译：缓释氮（N）肥料提供邮件），这对蔬菜生产具有潜在的好处。在沙子），土壤中，其使用可减少氮的淋失。如果缓释肥料的释放方式与作物需求相匹配，则生长中的作物对氮的吸收可能会变得更有效率。此外，如果可以将缓释肥料用作种植前的肥料，则可以降低生产成本，从而无需多次施用可溶性氮肥。合成缓释肥料可分为两大类：作为化学反应副产物而缓慢释放的肥料（例如尿素-甲醛），以及通过硫，蜡或树脂涂层周围缓慢释放的肥料。肥料颗粒。在蔬菜作物研究中，许多已有的文献集中在硫包衣尿素和尿素甲醛的使用上，因为它们已经在肥料市场上使用了40年。较新的研究已经评估了树脂涂层产品。在大多数研究中，使用缓释氮肥作为种植前处理不会降低作物产量，但是与标准分次施用可溶性氮相比，增产很少。基于现有研究，使用缓释氮肥的好处蔬菜作物的生产将来自减少的环境风险和生产成本的节省。

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