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引用本文:吉时育,王勇,张琨,等.乳业再生水长期灌溉对土壤有效氮素的影响及评价[J].灌溉排水学报,0,():-.
Ji Shiyu,Wang Yong,Zhang Kun,et al.乳业再生水长期灌溉对土壤有效氮素的影响及评价[J].灌溉排水学报,0,():-.
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乳业再生水长期灌溉对土壤有效氮素的影响及评价
吉时育1, 王勇2, 张琨2, 郭书婷2
1.内蒙古师范大学地理科学学院 呼和浩特市;2.内蒙古师范大学
摘要:
【目的】为研究农田土壤有效氮素对乳业污水及其再生水长期灌溉的响应,【方法】以呼和浩特市盛乐经济园区污水厂(乳业污水占91.45%)下游5种水质灌溉的玉米地为研究对象,设置了5个处理,即:机井17年连续灌溉区(JG)、再生水17年连续灌溉区(ZG)和机井与再生水17年连续混灌区(HG),污水1年灌溉地(W1)和污水5年连续灌溉地(W5),以荒地为对照(CK),研究了不同灌溉区0~90 cm土层土壤铵态氮、硝态氮、水解性有机氮的变化及其差异,并对耕层(0~50 cm)土壤的有效氮素进行了评价。【结果】W1、W5处理可显著提升土壤铵态氮、硝态氮和水解性有机氮含量;铵态氮、硝态氮各层的含量变化均有着随污水灌溉的时间增长,其影响程度逐渐降低;经JG、HG、ZG处理的土壤铵态氮、硝态氮、水解性有机氮各层含量差异不明显;铵态氮经灌溉后的含量比不灌溉的有明显提升;硝态氮各层不灌溉的含量与JG处理的含量基本相当;水解性有机氮不灌溉的含量除表层0~10 cm最低外,含量基本在60 mg/kg以下; 土壤氮素在不同月份间含量水平差异不明显。【结论】整体上污水灌溉处理的氮素含量优于其他灌溉处理方式,属于中等和一般水平,其余灌溉方式处理后的氮素基本上属于差等水平。
关键词:  乳业再生水;连续灌溉;氮素形态;评价
DOI:
分类号:S158;K903
基金项目:基于需水阈值的黄河流域内蒙古段生态修复与管控技术集成研究
Effect of Long-Term Irrigation with Reclaimed Water from Dairy Industry on Available Nitrogen
Ji Shiyu1, Wang Yong2, Zhang Kun2, Guo Shuting2
1.Inner Mongolia Normal University;2.内蒙古师范大学
Abstract:
【Objective】In order to study the response of farmland soil available nitrogen to the long-term irrigation of dairy wastewater and its reclaimed water, 【Method】The cornfield irrigated with 5 kinds of water quality downstream of the sewage plant in Shengle Economic Park, Hohhot City (dairy wastewater accounted for 91.45%) As the research object, 5 treatments were set up, namely: 17-year continuous irrigation area for motor-driven wells (JG), 17-year continuous irrigation area for reclaimed water (ZG), and 17-year continuous irrigation area for motor-driven wells and reclaimed water (HG), 1-year sewage irrigation area ( W1) and sewage irrigated continuously for 5 years (W5), with wasteland as the control (CK), the changes and differences of soil ammonium nitrogen, nitrate nitrogen and hydrolyzable organic nitrogen in 0-90 cm soil layers in different irrigation areas were studied. , and the available nitrogen of the soil in the plough layer (0-50 cm) was evaluated. 【Result】W1 and W5 treatments can significantly increase the contents of ammonium nitrogen, nitrate nitrogen and hydrolyzable organic nitrogen in the soil; the changes of the contents of ammonium nitrogen and nitrate nitrogen in each layer all increase with the time of sewage irrigation, and the degree of influence gradually increases. decreased; the content of ammonium nitrogen, nitrate nitrogen and hydrolyzable organic nitrogen in the soil treated by JG, HG and ZG was not significantly different; the content of ammonium nitrogen after irrigation was significantly higher than that without irrigation; The content of the non-irrigated layer was basically the same as that of the JG treatment; the content of hydrolyzable organic nitrogen was basically below 60 mg/kg except that the surface layer was the lowest at 0-10 cm; the content of soil nitrogen in different months was not different. obvious. 【Conclusion】On the whole, the nitrogen content of sewage irrigation treatment was better than that of other irrigation treatment methods, which belonged to the medium and general level, and the nitrogen content of the other irrigation methods basically belonged to the poor level.
Key words:  Dairy reclaimed water; Continuous irrigation; Nitrogen form; Evaluation