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有机酸是大多数农业土壤正常的组成分.土壤有机酸的作用,还没有完全确定,但是大量的事实证明,有机酸对植物生长有生理的影响.现已知道,土壤中产生的有机酸,有些对植物有毒性;而另一些有机酸,如生长素,能促进高等植物的生长.土壤溶液中有机酸的浓度一般是低的,并且变化也大.但是在生物活动旺盛的地方,例如正在分解的植物残余物附近,有机酸的浓度可能达到相当的高.有机酸连同生长素和植物毒害物质加在一起,在极端低的浓度条件下,都能影响植物的生长.
Organic acids are the normal component of most agricultural soils and the role of soil organic acids has not yet been completely determined, but a large number of facts show that organic acids have a physiological impact on plant growth.It is known that organic acids, Some are toxic to plants; while others, such as auxins, promote the growth of higher plants. The concentration of organic acids in soil solutions is generally low and varies greatly, but in places where biological activity is high Organic acids can reach quite high concentrations near decomposed plant residues, and organic acids, along with auxins and phytotoxic substances, can affect plant growth under extremely low concentrations.