Araújo A S F, Monteiro R T R
Universidade Estadual do Piauí, Av. Nossa Senhora de Fátima, S/N, Parnaíba, PI 64202-220, Brazil.
Chemosphere. 2006 Aug;64(6):1043-6. doi: 10.1016/j.chemosphere.2006.01.040. Epub 2006 Feb 28.
This laboratory study examines the effect of application of untreated and composted textile sludge on microbial biomass and activity in a Brazilian soil. The soil was amended with untreated and composted sludge at rates equivalent of 6.4t ha(-1) (0.64 g per 100g of soil) and 19t ha(-1) (1.90 g per 100g of soil), respectively, and were incubated at 28 degrees C for 60 days and daily sampled for microbial activity. An additional experiment, in the same condition, was conduced for evaluation of microbial biomass and enumeration of microorganisms at 15, 30 and 60 days after incubation. The application of composted sludge increased significantly the microbial biomass and activity, and bacteria number of soil. There were not differences in the microbial activity and bacteria number among the control and untreated sludge amended soils. In conclusion, after 2 months of incubation, the effects of the two amendments on soil microorganisms were: microbial biomass, soil respiration and bacteria number were increased only in composted sludge treated soil. qCO2 and fungi number were not affected by untreated and composted sludge.
这项实验室研究考察了施加未处理和堆肥化的纺织污泥对巴西一种土壤中微生物生物量及活性的影响。分别以相当于6.4吨/公顷（每100克土壤0.64克）和19吨/公顷（每100克土壤1.90克）的用量，用未处理和堆肥化的污泥对土壤进行改良，在28摄氏度下培养60天，并每天对微生物活性进行采样。在相同条件下进行了另一项实验，以评估培养15、30和60天后的微生物生物量及微生物计数。施加堆肥化污泥显著提高了微生物生物量、活性以及土壤中的细菌数量。在对照土壤和施加未处理污泥的土壤之间，微生物活性和细菌数量没有差异。总之，经过2个月的培养，两种改良措施对土壤微生物的影响为：仅在施加堆肥化污泥的土壤中，微生物生物量、土壤呼吸和细菌数量增加。未处理和堆肥化污泥均未影响qCO2和真菌数量。
