五倍子对池水细菌和藻类的影响

Effects of Galla chinensis on bacteria and algae in pool water

在试验水族箱内,研究不同浓度的五倍子药液对池水中细菌和藻类的影响.结果表明:用药72h时,细菌总数的减少与药液浓度呈显著相关(r=-0.84349,P<0.05);浓度高于3mg.L-1处理时,细菌总数平均下降了96.2%,其中革兰氏阴性细菌的菌群比例下降达最大值;超过72h,细菌总数呈上升趋势.一定浓度的五倍子药液对池水藻类具有短时间的抑制作用.用五倍子药液对养鱼池塘消毒防病,浓度以3mg.L-1,消毒时间以72h为宜.

With experimental aquarium, this paper studied the effects of different concentration Galla chinensis on the bacteria and algae in pool water. The results showed that when treated for 72 h, there was a significant correlation （ r = - 0. 84349, P 〈 0. 05 ） between the total number of bacteria and the concentration of G. chinensis. At the concentration of G. chinensis being higher than 3 mg · L^-1, the total number of bacteria was decreased by 96.2% averagely, and the proportion of Gram-negative bacteria decreased most. After 72 h, the total number of bacteria showed an increasing trend. Definite concentrations of G. Chinensis had a short-term inhibitory effect on the growth of algae. For fish-pond disinfection, the optimal concentration of G. Chinensis could be 3 mg · L^-1, and the optimal treating duration could be 72 h.