Lettl A
Folia Microbiol (Praha). 1981;26(3):243-52. doi: 10.1007/BF02927431.
The effect of a long-term application of sulphite, thiosulphate and sodium sulphate on the soil microflora and spruce seedlings was investigated in a pot experiment. Sulphur compounds decreased the concentration of bacteria, including thiobacilli, increased the concentration of microscopic fungi and sulphate-reducing bacteria; they inhibited respiration, nitrification and oxidation of thiosulphate, stimulated ammonification and oxidation of elemental sulphur. In certain cases the spruce rhizosphere exhibited just the opposite effect. In the rhizosphere the sulphate-reducing bacteria was suppressed together with thiobacilli, whose unit oxidative activity increased substantially. Growth of seedlings was inhibited by sulphite and stimulated by thiosulphate and sulphate. Sulphite, the effects of which were similar to those of sulphur dioxide immissions, was the most effective compound. In regions influenced by immissions the soil is apparently intoxicated by the absorbed sulphite.
通过盆栽试验研究了长期施用亚硫酸盐、硫代硫酸盐和硫酸钠对土壤微生物区系及云杉幼苗的影响。硫化合物降低了包括硫杆菌在内的细菌浓度，增加了显微真菌和硫酸盐还原菌的浓度；它们抑制了呼吸作用、硝化作用和硫代硫酸盐的氧化，刺激了氨化作用和元素硫的氧化。在某些情况下，云杉根际表现出相反的效果。在根际，硫酸盐还原菌与硫杆菌一起受到抑制，而硫杆菌的单位氧化活性大幅增加。亚硫酸盐抑制幼苗生长，硫代硫酸盐和硫酸盐则刺激幼苗生长。亚硫酸盐的作用与二氧化硫排放的影响相似，是最有效的化合物。在受排放影响的地区，土壤显然因吸收的亚硫酸盐而中毒。
