植株生长可能受到土壤酸度的不利影响。除了 pH 较低自身的不利影响外,在酸性土壤上高浓度游离 Al 和 Mn,以及 S、Ca、Mg 元素的缺乏均影响植物正常生长。抑制依赖于根瘤固氮作用的豆科植物生长,可能归因于对寄主植物自身生长的直接影响,或酸度对豆科植物根瘤菌共生的不同阶段产生影响,如限制了细菌在根区的繁殖,或抑制了根瘤菌的发育和功能所致。依赖根瘤菌固氮作用的不同豆科植 Plant growth may be adversely affected by soil acidity. Except for the low pH itself, the high concentration of free Al and Mn, and the lack of S, Ca, Mg in acidic soils all affected the normal growth of plants. Inhibition of the growth of legumes that depend on nodulation of nitrogen fixation may be attributed to the direct effects on the host plant’s own growth or to acidification at different stages of symbiosis of the leguminous plant rhizobia such as the restriction of bacterial growth in the root zone, Or inhibit the development and function of rhizobia. Different legumes depend on Rhizobium for nitrogen fixation