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Microbial mechanisms of greenhouse gas emissions from conservation tillage

ABSTRACT: The microbial mechanism of soil greenhouse gas emissions under long-term conservation tillage in dryland (16S rRNA amplicon sequencing)

PROVIDER: PRJNA526139 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8699170_1.fastq.gz	Fastqsanger.gz
	SRR8699170_2.fastq.gz	Fastqsanger.gz
	SRR8699180_1.fastq.gz	Fastqsanger.gz
	SRR8699180_2.fastq.gz	Fastqsanger.gz
	SRR8699190_1.fastq.gz	Fastqsanger.gz

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Microbial mechanisms of greenhouse gas emissions from conservation tillage

Project description:The microbial mechanism of soil greenhouse gas emissions under long-term conservation tillage in dryland (16S rRNA amplicon sequencing)

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Project description:Soil tillage practices have a profound influence on the physical properties of soil and the greenhouse gas (GHG) balance. However there have been very few integrated studies on the emission of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) and soil biophysical and chemical characteristics under different soil management systems. We recorded a significantly higher net global warming potential under conventional tillage systems (26-31% higher than zero tillage systems). Crucially the 3-D soil pore network, imaged using X-ray Computed Tomography, modified by tillage played a significant role in the flux of CO2 and CH4. In contrast, N2O flux was determined mainly by microbial biomass carbon and soil moisture content. Our work indicates that zero tillage could play a significant role in minimising emissions of GHGs from soils and contribute to efforts to mitigate against climate change.

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Project description:Changing food consumption patterns and associated greenhouse gas (GHG) emissions have been a matter of scientific debate for decades. The agricultural sector is one of the major GHG emitters and thus holds a large potential for climate change mitigation through optimal management and dietary changes. We assess this potential, project emissions, and investigate dietary patterns and their changes globally on a per country basis between 1961 and 2007. Sixteen representative and spatially differentiated patterns with a per capita calorie intake ranging from 1,870 to >3,400 kcal/day were derived. Detailed analyses show that low calorie diets are decreasing worldwide, while in parallel diet composition is changing as well: a discernable shift towards more balanced diets in developing countries can be observed and steps towards more meat rich diets as a typical characteristics in developed countries. Low calorie diets which are mainly observable in developing countries show a similar emission burden than moderate and high calorie diets. This can be explained by a less efficient calorie production per unit of GHG emissions in developing countries. Very high calorie diets are common in the developed world and exhibit high total per capita emissions of 3.7-6.1 kg CO(2eq.)/day due to high carbon intensity and high intake of animal products. In case of an unbridled demographic growth and changing dietary patterns the projected emissions from agriculture will approach 20 Gt CO(2eq.)/yr by 2050.

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Correction: Embodied Greenhouse Gas Emissions in Diets.

Project description:[This corrects the article DOI: 10.1371/journal.pone.0062228.].

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