Weyman-Kaczmarkowa W, Pedziwilk Z
Department of Agricultural Microbiology, Agricultural University, Poznań, Poland.
Microbiol Res. 2000 Jul;155(2):107-12. doi: 10.1016/S0944-5013(00)80045-2.
A study was made on the effect of liming (Ca(OH)2) on the numbers of colony-forming units (CFU) and the biomass of fungi in loamy sand (ls) and a loose sandy soil (lss) during 90 days under laboratory conditions. Liming inhibited the growth of fungi more strongly in the lighter soil. Raising the pH of lss from its native 4.5 to 7.0 and 9.0 decreased mean fungal CFU numbers by 50%, and their biomass by 42% and 68%, respectively, in comparison with control unlimed samples. Also in ls with its native pH of 7.7, when alkalinised to 9.0 and 11.0 the fungal CFU numbers were smaller than in the control by 25% and 50%, respectively, and the fungal biomass decreased by 40% and 56%, respectively. Although in a parallel research alkalinisation has been shown to stimulate bacterial growth very strongly, especially in lss, the total microbial biomass (fungal + bacterial) declined by an average of 30% (pH 9.0) and 40% (pH 11.0) in limed ls, and by 35% (pH 7.0) and as much as 50% (pH 9.0) in lss, in comparison with the control.
在实验室条件下，开展了一项关于石灰（Ca(OH)₂）对壤质砂土（ls）和疏松砂土（lss）中真菌的菌落形成单位（CFU）数量及生物量影响的研究，为期90天。石灰对质地较轻土壤中真菌生长的抑制作用更强。将lss的pH值从天然的4.5提高到7.0和9.0，与未添加石灰的对照样品相比，真菌CFU平均数量分别减少了50%，其生物量分别减少了42%和68%。同样，在天然pH值为7.7的ls中，碱化至9.0和11.0时，真菌CFU数量分别比对照少25%和50%，真菌生物量分别减少了40%和56%。尽管在一项平行研究中已表明碱化能非常强烈地刺激细菌生长，尤其是在lss中，但与对照相比，添加石灰的ls中微生物总生物量（真菌 + 细菌）平均下降了30%（pH 9.0）和40%（pH 11.0），在lss中则下降了35%（pH 7.0）和高达50%（pH 9.0）。
