Emissions of Nitrous Oxide from Agriculture: Responses to Management and Climate Change

Abstract Pig slurry is classified as a natural liquid fertilizer, which is a heterogeneous mixture of urine, faeces, remnants of feed and technological water, used to remove excrement and maintain the hygiene of livestock housing. The storage and distribution of pig slurry on farmland affect the environment as they are associated with, among others, the emission of various types of gaseous pollutants, mainly CH4, CO2, N2O, NH3, H2S, and other odorants. Methane (CH4), carbon dioxide (CO2) and nitrous oxide (N2O) are greenhouse gases (GHGs) which contribute to climate change by increasing the greenhouse effect. Ammonia (NH3) and hydrogen sulfide (H2S) are malodorous gases responsible for the occurrence of odour nuisance which, due to their toxicity, may endanger the health and lives of humans and animals. NH3 also influences the increase of atmosphere and soil acidification. The article presents the environmental impact of greenhouse gases and odorous compounds emitted from pig slurry. Key gaseous atmospheric pollutants such as NH3, H2S, CH4, CO2 and N2O have been characterized. Furthermore, methods to reduce the emission of odours and GHGs from pig slurry during its storage and agricultural usage have been discussed.

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Assessing the Potential Contribution of Pfumvudza Towards Climate Smart Agriculture in Zimbabwe: A Review

10.20944/preprints202101.0619.v1 ◽

2021 ◽

Author(s):

Never Mujere

Keyword(s):

Climate Change ◽

Nitrous Oxide ◽

Food Security ◽

Nitrous Oxide Emissions ◽

Household Food Security ◽

Potential Contribution ◽

Mitigation And Adaptation ◽

Household Food ◽

Smart Agriculture ◽

The Impact

Concerns of food and environmental security have increased enormously in recent years due to the vagaries of climate change and variability. Efforts to promote food security and environmental sustainability often reinforce each other and enable farmers to adapt to and mitigate the impact of climate change and other stresses. Some of these efforts are based on appropriate technologies and practices that restore natural ecosystems and improve the resilience of farming systems, thus enhancing food security. Climate smart agriculture (CSA) principles, for example, translate into a number of locally-devised and applied practices that work simultaneously through contextualised crop-soil-water-nutrient-pest-ecosystem management at a variety of scales. The purpose of this paper is to review concisely the current state-of-the-art literature and ascertain the potential of the Pfumvudza concept to enhance household food security, climate change mitigation and adaptation as it is promoted in Zimbabwe. The study relied heavily on data from print and electronic media. Datasets pertaining to carbon, nitrous oxide and methane storage in soils and crop yield under zero tillage and conventional tillage were compiled. Findings show that, compared to conventional farming, Pfumvudza has great potential to contribute towards household food security and reducing carbon emissions if implemented following the stipulated recommendations. These include among others, adequate land preparation and timely planting and acquiring inputs. However, nitrous oxide emissions tend to increase with reduced tillage and, the use of artificial fertilizers, pesticides and herbicides is environmentally unfriendly.

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The Threats to Food Security

Food for All in Africa ◽

10.7591/cornell/9781501743887.003.0004 ◽

2019 ◽

pp. 61-84

Author(s):

Gordon Conway ◽

Ousmane Badiane ◽

Katrin Glatzel

Keyword(s):

Climate Change ◽

Carbon Dioxide ◽

Nitrous Oxide ◽

Food Security ◽

Greenhouse Gases ◽

Acute Stress ◽

Rural Livelihoods ◽

Farm Household ◽

Impacts Of Climate Change ◽

Socioeconomic Challenges

This chapter explores threats to food security. It reveals many challenges arising from a range of threats external to the farm household, including severe biological threats from pests, disease, and weeds. Moreover, healthy, fertile soils are the cornerstone of food security and rural livelihoods, but African soils are degrading. Water is just as important for the productivity of plants, and lack of water leads to chronic and acute stress. Indeed, Africa is already battling the impacts of climate change. Rising temperatures and variable rainfall are increasing the exposure of smallholders to drought, famine, and disease. Agriculture is an important emitter of greenhouse gases (GHGs), not only carbon dioxide but also such powerful gases as methane and nitrous oxide. In addition, there are often severe socioeconomic challenges, including unstable and high prices of basic commodities. Finally, conflicts cause disruption to food security.

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Nitrous Oxide as a Driver of Climate Change

Nitrogen and Climate Change ◽

10.1057/9781137286963_4 ◽

2015 ◽

pp. 39-47

Author(s):

Dave Reay

Keyword(s):

Climate Change ◽

Nitrous Oxide

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Balancing the competing needs of climate change, biodiversity and rural communities

Proceedings of the British Society of Animal Science ◽

10.1017/s175275620003088x ◽

2009 ◽

Vol 2009 ◽

pp. 249-249

Author(s):

H Prosser

Keyword(s):

Climate Change ◽

Carbon Dioxide ◽

Land Use ◽

Nitrous Oxide ◽

Anaerobic Digestion ◽

Rural Communities ◽

Carbon Dioxide Emissions ◽

Energy Use ◽

New Technology ◽

The Uk

The work of the UK Climate Change Commission (UKCCC) in recommending targets and options for reducing emissions of greenhouse gases is focusing attention on what agriculture and land use can contribute to deliver these targets. Although overall the major issue is the reduction of carbon dioxide emissions from energy use, agriculture and land use are significant emitters of methane and nitrous oxide. UKCCC has identified three main routes by which emissions can be reduced• Lifestyle change with less reliance on carbon intensive produce -eg switching from sheep, and beef to pig, poultry and vegetables.• Changing farm practices – eg to improve use of fertilisers and manures• Using new technology on farms – eg modifying rumen processes, anaerobic digestion.

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