Details

Autor(en) / Beteiligte

• Wei, Sha
• Chadwick, David R.
• Amon, Barbara
• Dong, Hongmin

Titel

Comparison of nitrogen losses from different manure treatment and application management systems in China

Ist Teil von

• Journal of environmental management, 2022-03, Vol.306, p.114430-114430, Article 114430

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2022

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• There is a worldwide focus on reducing the environmental impacts of livestock manure management. In China, there are different manure treatment and application modes, including complete treatment to remove nitrogen (N) for direct discharge into watercourses. But we lack a systematic quantitative comparison of the environmental losses that occur from different management modes. We used an example farm of 10,000 finisher pigs to quantitatively analyze the annual N losses from land application (LA) and treatment to remove N from manure to the level of discharge consent (DS) under 24 sub-modes. This is an important study to unravel the effect of choice of different manure management systems on subsequent N losses. The results showed that the N losses from the LA mode (52.6% of total N excretion) were significantly lower than that from the DS mode (75.9%). Compared with other sub-modes, N emission from whole slurry injection was the smallest, accounting for 43.2% of total N excretion. NH3–N was the main source of N loss which accounted for 72.9% and 50.2% in LA and DS mode, respectively. The lowest N emission of LA mode with mitigation options, including slurry store covers, composting with bio-filter deodorization and injection application, was 28.8% of total N excretion, which is only 42.2% of N emission from DS mode with mitigation options. Insights from this systematic study of different manure management modes in China show the imperative of control ammonia emission for China, and provide guidance to the sustainable manure management in rapidly developing countries. [Display omitted] •The N losses from 24 manure management sub-modes were quantitative assessed.•N losses from land application model were 30% lower than standard discharge model.•Gaseous emissions were the main loss pathway in which NH3–N was the main source.•Policy and technology guidance should focus on NH3 mitigation in key stages.