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As each synthesis research paper involves a number of primary research papers ranging from 7 to 172, the assessment of impacts relies on a large number of results obtained mainly in field experiments (carried out in situations close to real farming environment), and sometimes in lab experiments or from model simulations.
1. DESCRIPTION OF THE FARMING PRACTICE
Description |
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Key descriptors | This review includes the following improved manure storage techniques:
Please, note that this is not an exhaustive list of improved manure storage techniques but of those found in the literature that meet the requirements to be included in our review. This review does not include techniques related to manure processing (e.g. anaerobic digestion, improved composting, solid-liquid separation, etc.), which are included in another group of fiches (Manure processing techniques). |
2. DESCRIPTION OF THE IMPACTS OF THE FARMING PRACTICE ON CLIMATE AND THE ENVIRONMENT
We reviewed the impacts of improved manure storage techniques compared to conventional storage techniques.
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***Accounting for the contribution of all GHGs (N2O, CH4, CO2), each one with its specific global warming potential, expressed as CO2-equivalents
3. DESCRIPTION OF THE KEY FACTORS INFLUENCING THE SIZE OF THE EFFECT
Only the factors explicitly studied in the reviewed synthesis papers with a significant effect are reported below. Details regarding the factors can be found in the summaries of the meta-analyses.
Impact | Factors |
Decrease air pollutants emissions | Type of technology (ref 1), Type of additive (ref 1, ref 7), Livestock type (ref 5), Manure characteristics (ref 6), Application dosage (ref 7), Initial moisture content (ref 7), Initial pH (ref 7), Initial C/N ratio (ref 7), Temperature in the heap (ref 14), Bulk density (ref 14) |
Decrease GHG emissions | Type of technology (ref 1), Type of additive (ref 1, ref 7), Initial moisture content (ref 7, ref 14), Additive properties (ref 7), Bulk density (ref 14) |
Decrease nutrients leaching and run-off | Additive type (ref 7), Additive properties (ref 7), Application dosage (ref 7), Initial moisture content (ref 7), Initial C/N ratio (ref 7) |
4. SYSTEMATIC REVIEW SEARCH STRATEGY
Keywords | TOPIC: (manure OR slurry OR digestate OR (digested near/3 manure)) AND TOPIC: (management OR storage OR lagoon* OR "anaerobic digest*" OR tank* OR treatment OR process* OR technolog* OR techni* OR (soil near/3 application) OR (soil near/3 distribution) OR (soil near/3 amend*) OR biogas OR precision) AND TOPIC: ("meta-analy*" OR "systematic* review*" OR "evidence map" OR "global synthesis" OR "evidence synthesis" OR "research synthesis") or TITLE-ABS-KEY: (manure OR slurry OR digestate OR (digested W/3 manure)) AND TITLE-ABS-KEY: (management OR storage OR lagoon* OR "anaerobic digest*" OR tank* OR treatment OR process* OR technolog* OR techni* OR (soil W/3 application) OR (soil W/3 distribution) OR (soil W/3 amend*) OR biogas OR precision) AND TITLE-ABS-KEY: ("meta-analy*" OR "systematic* review*" OR "evidence map" OR "global synthesis" OR "evidence synthesis" OR "research synthesis") |
Search dates | No time restrictions |
Databases | Web of Science and Scopus, run in July 2021 |
Selection criteria | The main criteria that led to the exclusion of a synthesis paper were if the paper: (1) was out of the scope; (2) did not deal with improved manure storage techniques or dealt with other stages of manure management (e.g. processing, land application, animal housing techniques); (3) reported studies with absolute values of emission factors, without comparing storage techniques with a reference management scenario; (4) did not clearly state the intervention and comparator; (5) was not either a systematic review or a meta-analysis; (6) was not written in English. Synthesis papers that passed the relevance criteria were subject to critical appraisal carried out on paper-by-paper basis. The search returned 269 synthesis papers potentially relevant for the practice object of our fiche. Searches for other farming practices added another 8 potentially relevant synthesis papers. From the 277 potentially relevant synthesis papers, 223 were excluded after reading the title and abstract, and 40 after reading the full text according to the above-mentioned criteria. Finally, 14 synthesis papers were selected for improved manure storage techniques. |
7. LIST OF SYNTHESIS PAPERS INCLUDED IN THE REVIEW
Ref. Num | Authors | Year | Title | Reference | DOI |
1 | Zhang Z., Liu D., Qiao Y., Li S., Chen Y., Hu C. | 2021 | Mitigation of carbon and nitrogen losses during pig manure composting: A meta-analysis | Science of the Total Environment 783 147103 | 10.1016/j.scitotenv.2021.147103 |
2 | Zhao, SX; Schmidt, S; Qin, W; Li, J; Li, GX; Zhang, WF | 2020 | Towards the circular nitrogen economy - A global meta-analysis of composting technologies reveals much potential for mitigating nitrogen losses | Sci. Total Environ. 704, 135401 | 10.1016/j.scitotenv.2019.135401 |
3 | Ba, SD; Qu, QB; Zhang, KQ; Groot, JCJ | 2020 | Meta-analysis of greenhouse gas and ammonia emissions from dairy manure composting | Biosystems engineering | 10.1016/j.biosystemseng.2020.02.015 |
4 | Emmerling, C; Krein, A; Junk, J | 2020 | Meta-Analysis of Strategies to Reduce NH3 Emissions from Slurries in European Agriculture and Consequences for Greenhouse Gas Emissions | Agronomy 10, 1633 | 10.3390/agronomy10111633 |
5 | Ti, CP; Xia, LL; Chang, SX; Yan, XY | 2019 | Potential for mitigating global agricultural ammonia emission: A meta-analysis | Environ. Pollut. 245, 141–148 | 10.1016/j.envpol.2018.10.124 |
6 | Wang, Y; Xue, W; Zhu, Z; Yang, J; Li, X; Tian, Z;Dong, H; Zou, G; | 2019 | Mitigating ammonia emissions from typical broiler and layer manure management - A system analysis | Waste Management | 10.1016/j.wasman.2019.05.019 |
7 | Cao Y, Wang X, Bai Z, Chadwick D, Misselbrook T, Sommer SG, Qin W, Ma L | 2019 | Mitigation of ammonia, nitrous oxide and methane emissions during solid waste composting with different additives: A meta-analysis | Journal of Cleaner Production | 10.1016/j.jclepro.2019.06.288 |
8 | Akdeniz, N | 2019 | A systematic review of biochar use in animal waste composting | Waste Management | 10.1016/j.wasman.2019.03.054 |
9 | Sajeev, EPM; Winiwarter, W; Amon, B | 2018 | Greenhouse Gas and Ammonia Emissions from Different Stages of Liquid Manure Management Chains: Abatement Options and Emission Interactions | Journal of environmental quality | 10.2134/jeq2017.05.0199 |
10 | Wang, Y; Li, XR; Yang, JF; Tian, Z; Sun, QP; Xue, WT; Dong, HM | 2018 | Mitigating Greenhouse Gas and Ammonia Emissions from Beef Cattle Feedlot Production: A System Meta-Analysis | Environmental Science & Technology | 10.1021/acs.est.8b02475 |
11 | Wang, Y; Dong, HM; Zhu, ZP; Gerber, PJ; Xin, HW; Smith, P; Opio, C; Steinfeld, H; Chadwick, D | 2017 | Mitigating Greenhouse Gas and Ammonia Emissions from Swine Manure Management: A System Analysis | ENVIRONMENTAL SCIENCE & TECHNOLOGY | 10.1021/acs.est.6b06430 |
12 | Jayasundara, S; Appuhamy, JADRN; Kebreab, E; Wagner-Riddle, C | 2016 | Methane and nitrous oxide emissions from Canadian dairy farms and mitigation options: An updated review | CANADIAN JOURNAL OF ANIMAL SCIENCE | 10.1139/cjas-2015-0111 |
13 | Hou, Y; Velthof, GL; Oenema, O | 2015 | Mitigation of ammonia, nitrous oxide and methane emissions from manure management chains: a meta-analysis and integrated assessment | Glob. Chang. Biol. 21, 1293–1312 | 10.1111/gcb.12767 |
14 | Pardo, G; Moral, R; Aguilera, E; del Prado, A | 2015 | Gaseous emissions from management of solid waste: a systematic review | Glob. Chang. Biol. 21, 1313–1327 | 10.1111/gcb.12806 |
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