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- Title
土壤渗滤系统处理农村黑灰水 对庭院菜地土壤环境的影响.
- Authors
王淞民; 刘丽媛; 魏孝承; 彭皓; 张春雪; 柳博; 郑向群
- Abstract
To explore the effect of rural black-gray water treatment by a soil infiltration system on the soil environment of garden vegetable fields, a three-compartment septic tank+infiltration trench infiltration system was established in Zhanglaorenzhuang in the Ninghe District of Tianjin City on 13 July 2020. Vegetable garden with four treatment groups, namely, control(CK), cabbage(BC), cucumber(HG), summer radish(SLB), were built above the soil infiltration system simultaneously to explore the influences of infiltration trench system on the following physical and chemical indicators:the total nitrogen(TN)and total phosphorus(TP)content, a hygienic index using fecal coliforms and ascaris egg mortality, a biological index, and indicators of vegetable hygiene. Results showed that the TN content in two soil layers of the vegetable field in each treatment group showed an increasing and then decreasing trend for the physical and chemical indicators. For the BC, HG, and SLB groups, the TN content in the topsoil increased by 589.77%, 356.93%, and 70.00%, respectively, and in the deep soil by 266.46%, 718.22%, and 148.70%, respectively, from planting to harvesting. The TP content in the vegetable fields of all treatment groups showed an increasing, then decreasing, and then increasing trend. For the topsoil, the TP content of the CK group decreased by 9.66% but increased in the other three treatment groups by 0.14%, 4.53%, and 3.09%. For deep soil, the TP content in four treatment groups decreased by 16.63%, 8.65%, 18.89%, and 4.35%, respectively. In terms of biological indicators, the treatment of rural black-gray water by the soil filtration system promoted the diversity and richness of the soil bacterial community in deep vegetable fields (P<0.05)and decreased the relative abundance of pathogenic microorganisms. Moreover, the fecal coliforms and mortality of ascarid eggs of the garden vegetable soil met the Hygienic requirements for harmless disposal of night soil(GB 7959—2012). In addition, the fecal coliform content of the three types of vegetables was less than 3 MPN·g-1, whereas the ascarid egg mortality was 100%. In conclusion, the soil infiltration system treatment of rural black-gray water can significantly increase the soil TN and TP content in vegetable fields during vegetable planting. The soil hygiene indicators of vegetable fields before and after the treatment of rural black ash water by the soil infiltration system meet the harmlessness requirement. The treatment of rural black-gray water by a soil infiltration system can improve the growth and reproduction environment of soil microorganisms in vegetable fields, reducing the risk of disease-treating microorganisms to the environment. Thus, building a garden on top of a soil infiltration system is possible without compromising vegetable safety
- Subjects
TIANJIN (China); SOIL infiltration; EGGPLANT; COLIFORMS; WATER filtration; VEGETABLE gardening; GARDENS; MERCURY poisoning
- Publication
Journal of Agricultural Resources & Environment / Nongye Ziyuan yu Huanjing Xuebao, 2022, Vol 39, Issue 2, p305
- ISSN
2095-6819
- Publication type
Article
- DOI
10.13254/j.jare.2021.0404