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Effect of live fences of Gliricidia sepium on CO2 fluxes in tropical livestock systems


Villanueva-Lopez, G and Casanova-Lugo, F and Martinez-Zurimendi, P and Parsons, D and Aguilar-Solis, LA, Effect of live fences of Gliricidia sepium on CO2 fluxes in tropical livestock systems, Soil Use and Management, 32, (4) pp. 553-564. ISSN 0266-0032 (2016) [Refereed Article]

Copyright Statement

2016 British Society of Soil Science.

DOI: doi:10.1111/sum.12311


Live fences have the potential to improve microclimatic conditions, moderate soil CO2 fluxes and function as carbon sinks. We quantified variation in soil CO2 fluxes from livestock silvopastoral systems under the canopies of live fences (LF), formed by Gliricidia sepium trees, or artificial fences (AF). We determined the responses of soil CO2 fluxes to environmental factors, including diurnal and seasonal variations in temperature and relative humidity in each fencing system. Measurements were made from April to June (dry season) and from July to September (rainy season), 2012. Fluxes were similar between the two livestock systems; LF emitted 1.00μmol CO2/m2/s and AF 1.02μmol CO2/m2/s. Soil temperatures at 5cm depth were 3% warmer in AF than in LF, and relative humidity was 16% greater in LF than in AF. Seasonal variation in temperature greatly affected soil CO2 fluxes, which changed seasonally in parallel with temperature of the topsoil and relative humidity at 1m height, peaking in late summer. Fluxes in LF and AF were greater in the rainy season (1.1μmol CO2/m2/s, for both systems), when soil temperature was cooler and relative humidity was greatest, than during the dry season (0.9μmol CO2/m2/s, for both systems). Soil fluxes were larger at night (00:0006:00h), when soil temperature was cooler and relative humidity greater, than during the morning (6:0012:00h), when soil temperature was warmer and relative humidity was less. The presence of G. sepium trees in LF did not influence soil CO2 fluxes.

Item Details

Item Type:Refereed Article
Keywords:Brachiara decumbens, closed chamber, greenhouse gases, humid tropics, silvopastoral system
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Agriculture, land and farm management
Research Field:Agricultural systems analysis and modelling
Objective Division:Environmental Management
Objective Group:Terrestrial systems and management
Objective Field:Evaluation, allocation, and impacts of land use
UTAS Author:Parsons, D (Dr David Parsons)
ID Code:117457
Year Published:2016
Web of Science® Times Cited:3
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2017-06-15
Last Modified:2017-11-06

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