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本文针对缓释肥的概念、研究对象、生产成本和对生态环境的影响等方面作了论述。文章强调,在室内纯水中获得的缓释肥特性测定值与将其施入田间土壤后的实际缓释值将有很大偏差;缓释肥单位养分的成本、售价将比普通肥显著提高;缓释肥在生产、运输过程中的能耗,特别是随产品带入土壤的过量硫、聚烯烃和甲醛等有害物质,将对生态环境产生不可低估的负面影响。论文提供了评价缓释肥农化性质的若干建议:如用土壤真溶液替代纯水去测定缓释肥的溶解特性;开展缓释肥的15N同位素标记研究以及规范田间与小区肥效试验等。
This article discusses the concept of slow release fertilizer, research object, production costs and the impact on the ecological environment. The article emphasizes that the measured value of the slow release fertilizer obtained in indoor pure water will have a great deviation from the actual slow release value after it is applied to the field soil. The cost per unit nutrient of the slow release fertilizer will be significantly higher than that of ordinary fertilizer The energy consumption of slow-release fertilizer in the process of production and transportation, especially the excess sulfur, polyolefins and formaldehyde which are brought into the soil with the products, will have a negative impact on the ecological environment. The paper provides some suggestions to evaluate the agrochemical properties of slow-release fertilizer. For example, the solution of slow-release fertilizer is replaced by the solution of pure soil in soil, the 15N isotope labeling of slow-release fertilizer and the standard fertilizer and field test.