摘要
为了观测生活污水杨树林地处理对土壤和林木生长的影响,2008—2009年在郑州市龙湖镇,采用不同水力负荷(0、3、6、9、12、15cm/周),进行了污水慢渗生态处理试验。测定了污水处理期间杨树地上部分生长量,对表层(0—40cm)和下层(40—100cm)土壤理化性质进行了分析。选用土壤容重、有机质、全氮、全磷、全钾、速效氮、速效磷、速效钾作为土壤质量因子,运用土壤质量综合指标评价不同处理表层土壤质量,对下层土壤的理化性状的变化进行了研究。结果表明:在3—9cm/周水力负荷时,表层土壤质量综合指标值(QI值)和杨树地上部分生长量均随着水力负荷的增加而增加,在9cm/周水力负荷时达到最大;水力负荷大于9cm/周,QI值和杨树地上部分生长量随着水力负荷增加而降低。在水力负荷较低时,污水处理对下层土壤性状影响较小,水力负荷大于9cm/周,污水处理对下层土壤性状产生了不良影响。生活污水杨树林地处理比较适宜的水力负荷是6—9cm/周。
Along with the development of urbanization and the improvement of people＇s living standard, the domestic sewage is dramatically increased through time, resulting in serious environmental deteriorating in the water body. In order to decrease the pollution of surrounding water environment, the sewage treatment approaches through lands have been developed quickly and widly used. One of the most successful method is the slow filtering eco-treatment system, which lets sewage to go through the land planted with vegetation so that the sewage can be purified via flowing through the soil system. However, due to the high NaC1 content in the domestic sewage, this treatment method may bring negative effects on the soil and plant. Accordingly, the hydraulic loading rate is the key parameter in slow filtering eco-treatment for the health of soil system and plant growth. To get a scientific and rational hydraulic loading rate is critical for sewage dispose and usage in land system. Therefore, our objectives are to evaluate the impacts of sewage through slow filtering eco-treatment system on soil properties and poplar growth, as well as to choose a suitable hydraulic loading rate for poplar plantation. The slow filtering eco-treatment system for sewage treatment was carried out with five hydraulic loading rates （0, 3, 6, 9, 12, 15 cm/week） from 2008 to 2009 in Longhu town, Zhengzhou City, China. The aboveground biomass growth and the physicochemical properties of topsoil （0--40 cm） and subsoil （40- 100cm） were investigated during the experiment duration. Eight soil properties were investigated, such as soil organic carbon （SOC）, soil nitrogen （N）, soil phosphorus （P） and soil potassium （K） and etc. In order to simplify the comparison of the differences in soil characteristics, an comprehensive quality index （ QI value ） was used for topsoil layer, while the subsoil properties were analyzed with the single soil physicochemical property. Our results showed significant differences in the effects
出处
《生态学报》
CAS
CSCD
北大核心
2010年第22期6163-6172,共10页
Acta Ecologica Sinica
基金
国家"十一五"重大科技支撑项目(2006BAD03A1704)
国家林业局行业公益专项支撑项目(20070414)
关键词
慢渗生态处理系统
水力负荷
土壤性状
杨树生长量
slow filtering eco-treatment system
hydraulic loading rates
soil properties
poplar aboveground growth
