| 引用本文: | 韩洋,齐学斌,李平,等.再生水和清水不同灌水水平对土壤理化性质及病原菌分布的影响[J].灌溉排水学报,2018,37(8):32-38. |
| HAN Yang,QI Xuebin,LI Ping,et al.再生水和清水不同灌水水平对土壤理化性质及病原菌分布的影响[J].灌溉排水学报,2018,37(8):32-38. |
|
| 摘要: |
| 【目的】探讨再生水和清水不同灌水水平对土壤理化性质和指示性病原菌粪大肠菌群数量分布的影响。【方法】采用室内土柱试验，研究了不同水质、不同灌水水平下土壤理化性质和粪大肠菌群的分布规律。【结果】相比清水灌溉，再生水灌溉下土壤有机质量（OM）、总氮量（TN）、总磷量（TP）、电导率（EC）显著提高，土壤pH值略微下降，且再生水充分灌溉处理的表层0～20 cm土壤有机质量（OM）、总氮量（TN）、总磷量（TP）均高于非充分灌溉处理，电导率（EC）则相反；再生水灌溉下，土壤中粪大肠菌群数量显著提高，各土层粪大肠菌群数量均显著高于清水灌溉，再生水充分灌溉下表层0～20 cm土壤粪大肠菌群数量显著高于非充分灌溉；土壤粪大肠菌群数量与OM、TN、TP量和EC均正相关，与土壤pH值、含水率负相关。【结论】再生水灌溉能够在一定程度上提高土壤肥力，合理控制再生水灌水水平可有效阻控土壤病原菌的污染；土壤养分量越高，越有利于粪大肠菌群的生长繁殖。 |
| 关键词: 再生水； 灌水水平； 理化性质； 粪大肠菌群 |
| DOI：10.13522/j.cnki.ggps.2017.0677 |
| 分类号: |
| 基金项目: |
|
| Effects of the Amount of Irrigation with Reclaimed Wastewater on Soil Properties and Distribution of Pathogenic Bacteria |
|
HAN Yang, QI Xuebin, LI Ping, CHANG Di, LI Zhongyang, CUI Bingjian, YAN Xushan
|
|
1. Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China; 2. Graduate University of Chinese Academy of Agricultural Sciences, Beijing 100081, China; 3. Key Laboratory of High-efficient and Safe Utilization of Agriculture Water Resources, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China
|
| Abstract: |
| 【Objective】 Reusing reclaimed wastewater for irrigation can relieve demand for freshwater and reduce its discharge into watercourse, but it could risk pathogenic spreading. The purpose of this paper is to investigate the impact of the amounts of irrigation with treated municipal wastewater on physical and chemical properties of soil, as well as the distribution of fecal coliforms. 【Method】 The experiments were conducted in soil columns irrigated with reclaimed wastewater taken from a local wastewater treatment plant. In the experiments, we measured change in the physical and chemical of the soil, as well as the distribution of fecal coliform bacteria under different irrigation rates and water qualities. The control was irrigation with tap water. 【Result】 Compared to the CK, irrigating with the treated wastewater increased soil organic matter (OM), total nitrogen (TN), total phosphorus (TP) and electrical conductance (EC), whereas reduced soil pH slightly. The OM, TN and TP in the topsoil (0~20 cm) were higher under sufficient irrigation than under insufficient irrigation, as opposed to EC. It was found that irrigation with the reclaimed wastewater significantly increased the number of fecal coliform bacteria in the soil, especially in the topsoil (0~20 cm). The number of fecal coliform bacteria was positively correlated with the contents of OM, TN, TP and EC, and negatively correlated with soil pH and soil water content. 【Conclusion】 Irrigation with reclaimed wastewater can improve soil fertility; appropriately controlling the irrigation amount can effectively reduce pollution of pathogenic bacteria. Increase in soil nutrients favors growth and spreading of fecal coliform bacteria in soil. |
| Key words: Reclaimed wastewater; irrigation level; physical and chemical properties; fecal coliform bacteria |
