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化肥的增产效益是一个较为复杂的概念。其直接效益主要指肥效(增产百分率、斤肥增产量、斤肥利润等);其间接效益则应包括贮能(太阳能)、提高土壤肥力、改善农产品质量、强化农牧业物质循环以及集约化程度等多方面效果。本文仅就化肥的直接效益,试谈几点粗浅的看法。一、正确认识和调节肥效的报酬递减趋势在一定地区内,同一品种以及在相同的栽培条件下,单位化肥的增产效果随施肥量的增加而逐渐降低,即肥效呈报酬递减趋势。如常用的化肥碳酸氢铵(以下简称碳铵)。
Fertilizer yield increase is a more complex concept. Its direct benefit mainly refers to the efficiency of fertilizer (yield increase, yield increase of jinliao, profit of jinlian, etc.); its indirect benefits should include energy storage (solar energy), increase soil fertility, improve the quality of agricultural products, intensify material circulation and intensification of agriculture and animal husbandry Degree and many other effects. This article only on the direct benefits of fertilizer, to talk about a few superficial views. First, the correct understanding and regulation of fertilizer decreasing trend In a certain area, the same variety and under the same cultivation conditions, the unit yield of fertilizer increased with the increase of fertilizer decreased, that is, fertilizer returns showed a decreasing trend. Such as fertilizer ammonium bicarbonate (hereinafter referred to as ammonium bicarbonate).