数字农科院2.0

Achieving overall low greenhouse gas and ammonia emissions from digested pig slurry during storage and after field application by maintaining a micro-oxygen level at the storage stage

文献类型： 外文期刊

作者： Wang, Yue;Xu, Huasheng;Wang, Youxu;Wang, Wenzan;Wang, Xuexia;Zhang, Haorui;Zhu, Zhiping;Dong, Hongmin

作者机构：

关键词： Manure management;Gaseous emissions;Reactive nitrogen gases;Micro-oxygen;Fertilization

期刊名称： JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

ISSN： 2213-2929

年卷期： 2025 年 13 卷 3 期

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Slurry aerobic treatment is usually used to decrease excess nutrients to soil, but few studies have considered GHG and NH3 emissions from storage and field application stages with slurry aerobic treatment at different dissolved oxygen (DO) levels. In this study, digested pig slurry storage treatments with a micro-oxygen group (MO; DO = 0.3 mg L- 1), an aerobic group (AR; DO = 1.3 mg L- 1), and a control group (Ctrl; no aeration) were set. The CH4, N2O, NH3, and NO emissions during 221 days of storage were quantified, and the N2O and NH3 emissions after slurry application to Brassica napus L. (45 days) were studied. The storage period accounted for 83-91 % and 66-71 % of the total GHG and NH3 emissions independent of treatments, respectively. CH4 contributed 85.1 % and 70.1 % to the total GHG emissions from the two stages in Ctrl and MO, respectively. N2O emission was high in autumn, ceased in winter, and reoccurred in warm spring in AR, contributing 75.6 % to the total GHG emissions. AR caused the conversion of ammoniacal nitrogen to nitrate and nitrite nitrogen, and the key functional bacteria for partial denitrification Thauera were richly accumulated. Overall, MO reduced the total GHG emissions by 21.6 % compared with Ctrl, and the total NH3 emissions increased by only 4.5 %. AR reduced the total NH3 emissions by 42.5 %, but the GHG emissions increased by 110 % because of the high emission of N2O. Maintaining aeration under the MO condition could help reduce GHG emissions without substantial stimulation of NH3.

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