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- Title
牛粪尿短期储存氨释放与养分转化的抑制剂作用成 效研究.
- Authors
陈哲; 吕艳花; 杜岩功; 张莉; 周华坤; 王英典; 王文颖
- Abstract
Reducing ammonia (NH 3 ) emissions and nitrogen (N) losses in the process of dung and urine storage are crucial for waste resources utilization and air pollutants reduction in stockbreeding industry. We selected the fresh mixture of cow dung and urine from the intensive livestock farm in Qinghai-Tibetan Plateau as the research object. Urease inhibitor (N-(n-butyl) thiophosphoric triamide, NBPT), nitrification inhibitor (3.4-dimethylpyrazole phosphate, DMPP) and alum were added to the fresh cattle feces, and the nutrient contents and NH 3 fluxes under different inhibitor treatments during 22 days of feces storage were tested. The structural equation model was employed to analyze the effects of various factors on NH 3 emissions and N transformations during the storage of feces. The results showed that (1) Nitrification inhibitor and low-dose alum addition had no effects on N losses and ammonia emissions during the storage of feces. But the cumulative emissions of NH 3 in NBPT treatment was reduced by 25.07% than the control group. (2) During the short-term storage of feces and urine, total organic nitrogen content in NBPT treatment increased by 43.86 % compared with the control group, while the ammonium nitrogen content decreased by 39.15%, and the average C:N ratio increased by 20.99 %. (3) The higher water content was beneficial to reducing the NH 3 emissions during the storage of feces. Meanwhile, urease inhibitor could reduce ammonium nitrogen production and NH 3 flush by reducing total organic nitrogen decomposition and C:N rate. Shortly, urease inhibitor could effectively slow down N losses and NH 3 release by controlling the ammonium production in short-term storage in the processing of cow dung and urine mixture, while the optimal application conditions of nitrification inhibitor and alum need to be further studied.
- Subjects
NITRIFICATION inhibitors; WASTE recycling; STRUCTURAL equation modeling; AIR pollutants; LIVESTOCK farms; AMMONIUM
- Publication
Ecological Science, 2023, Vol 42, Issue 5, p1
- ISSN
1008-8873
- Publication type
Article
- DOI
10.14108/j.cnki.1008-8873.2023.05.001