论文部分内容阅读
利用造纸废水恢复重度退化湿地,分析了土壤微生物数量、土壤呼吸强度及微生物量碳的变化情况。结果表明,灌溉后,8月份,细菌和真菌数量最多,放线菌5月份数量最多;细菌、真菌、放线菌各灌水深度上层大于中层,各灌水深度、细菌、真菌、放线菌上层数量均大于对照;土壤呼吸主要发生在表层(0～20 cm);8月份,微生物量碳达到最大值690.3mg/kg,且上中下层依次递减。相关分析表明,15 cm灌水量,土壤呼吸强度与有机碳呈极显著正相关(r=0.996,P=0.0036),灌水量为0、5、10和20 cm,土壤微生物量碳与有机碳呈极显著正相关(r=0.999,0.999,0.999;P<0.001),15 cm灌水量,微生物量碳与速效磷呈极显著正相关(r=0.972,P=0.028);5 cm灌水量,微生物总数与有机碳呈显著线性正相关(r=0.953,P=0.047),对照和15 cm灌水量,微生物总数与速效磷呈显著正相关(r=0.976,P=0.024;r=0.968;P=0.032)。灌溉处理后的造纸废水,可增加重度退化湿地土壤微生物的活性,改善土壤质量。
Using papermaking wastewater to restore heavy degraded wetlands, the changes of soil microbial quantity, soil respiration intensity and microbial biomass carbon were analyzed. The results showed that after irrigation, the number of bacteria and fungi was the highest in August, and the quantity of actinomycetes was the largest in May. The numbers of bacteria, fungi and actinomycetes in the depth of irrigation were higher than those in the middle, and the depths of irrigation, bacteria, fungi and actinomycetes Soil respiration mainly occurred in the surface layer (0-20 cm). In August, microbial biomass carbon reached a maximum of 690.3 mg / kg, and the upper and lower layers decreased in turn. Correlation analysis showed that there was a significant positive correlation (r = 0.996, P = 0.0036) between the 15 cm irrigation volume and the soil respiration rate and the soil organic carbon. The soil microbial biomass carbon and organic carbon were 0, 5, 10 and 20 cm (R = 0.999, 0.999, 0.999; P <0.001). There was a significant positive correlation between 15 cm irrigation volume, microbial biomass C and available P (r = 0.972, P = 0.028) (R = 0.953, P = 0.047). There was a significant positive correlation between the total amount of microbe and available phosphorus in the control and 15 cm irrigation (r = 0.976, P = 0.024; 0.032). The paper-making waste water after irrigation can increase the activity of soil microorganisms in severely degraded wetlands and improve soil quality.