论文部分内容阅读
以滨海不同盐碱化程度土壤,即棉田土壤(CS,含盐量0.37%)、轻度盐化土(SS,含盐量0.4%)、中度盐化土(MSS,含盐量1.41%)及重度盐化土(SSS,含盐量2.50%)为对象,研究了造纸废水二级出水灌溉不同盐碱化土壤中微生物的数量、分布以及土壤含盐量的变化。结果表明,造纸废水灌溉能显著提高不同盐碱化程度土壤的细菌、真菌、放线菌数量和土壤呼吸强度,又能缩小不同盐碱化程度土壤中微生物数量的差距。土壤盐碱化程度越高,细菌所占比例越大。废水灌溉条件下,CS和SS土壤含盐量在变化不大,而MSS和SSS土壤含盐量呈现先下降而后缓慢上升的趋势,但没有显著性提高。
Soil salinity with different salinities (CS, salinity 0.37%), salinized soils (SS, salinity 0.4%), moderate saline soils (MSS, salinity 1.41% ) And heavy saline soil (SSS, salinity 2.50%), the quantity and distribution of microorganisms in different salinized soils irrigated by the secondary effluent of papermaking wastewater and the changes of soil salinity were studied. The results showed that irrigation of papermaking wastewater could significantly increase the number of bacteria, fungi, actinomycetes and soil respiration in different salinization degree soils, and reduce the difference in the number of microorganisms in soils with different salinization degrees. The higher degree of soil salinization, the greater the proportion of bacteria. Under the condition of wastewater irrigation, the salinity of CS and SS did not change much, but the salinity of soil of MSS and SSS tended to decline first and then slowly increased, but there was no significant increase.