外源碳与硝化抑制剂添加下猪尿还田土壤性质的响应特征
Response Characteristics of Soil Properties to Exogenous Carbon and Nitrification Inhibitor Addition with the application of Pig Urine
马子清 1邹文萱 2沈菊培1
作者信息
- 1. 福建师范大学地理科学学院，福州 350117
- 2. 中国科学院生态环境研究中心，北京 100085
- 折叠
摘要
如何减少畜禽粪尿来源氮素损失并提高土壤氮素保留是农业环境领域关注的重要问题。本研究以畜禽粪尿氮为研究对象，通过短期培养实验（28天），以新鲜或老化秸秆和生物炭作为外源碳，结合硝化抑制剂，探究外源碳与硝化抑制剂对猪尿还田土壤性质的影响，结果表明：培养期间土壤铵态氮持续下降，而硝态氮总体升高，主要变化发生于培养后3 ～ 7天。外源碳添加显著改变氮的转化，秸秆处理后期土壤硝态氮含量低于生物炭处理，新鲜秸秆具有较强的活性碳供给能力，而生物炭对土壤pH具有较好的缓冲作用。硝化抑制剂双氰胺处理下土壤铵态氮含量显著高于其他处理，表现出一定的硝化抑制作用。综上，外源碳类型及老化状态可通过调节土壤可利用碳氮和pH影响氮转化，为猪尿还田条件下外源碳的合理利用及土壤氮素调控提供了理论依据。
Abstract
Reducing nitrogen (N) losses from livestock and poultry urine and improving soil N retention are important concerns in agricultural environmental research. In this study, a 28-day short-term incubation experiment was conducted to investigate the effects of exogenous carbon and nitrification inhibitors on soil properties following pig urine application. Fresh or aged straw and biochar were used as exogenous carbon sources, combined with nitrification inhibitor treatments. The results showed that soil ammonium concentrations continuously decreased, whereas nitrate concentrations generally increased during incubation, with the most pronounced changes occurring between 3 and 7 days. Exogenous carbon addition significantly altered N transformation, and soil nitrate concentrations were lower in straw treatments than in biochar treatments at the later stage of incubation. Fresh straw exhibited a strong capacity to supply labile carbon, whereas biochar showed a greater capacity to buffer soil pH. Treatment with dicyandiamide resulted in significantly higher soil ammonium concentrations than the other treatments, indicating a certain degree of nitrification inhibition. Overall, the type and aging state of exogenous carbon may regulate soil N transformation by altering the availability of soil carbon and nitrogen and soil pH. These findings provide a theoretical basis for the rational application of exogenous carbon and regulation of soil N under pig urine return conditions.关键词
猪尿、生物炭、秸秆、硝化抑制剂、有效态氮Key words
pig urine/biochar/straw/nitrification inhibitor/available nitrogen引用本文复制引用
马子清,邹文萱,沈菊培.外源碳与硝化抑制剂添加下猪尿还田土壤性质的响应特征[EB/OL].(2026-10-16)[2026-10-18].http://www.paper.edu.cn/releasepaper/content/202610-10.学科分类
农业基础科学
