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No. de sistema: 000056901

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040 _ _ a| ECO
c| ECO
043 _ _ a| n-mx-tb
044 _ _ a| fr
245 0 0 a| Live fences reduce the diurnal and seasonal fluctuations of soil CO2 emissions in livestock systems
506 _ _ a| Acceso electrónico sólo para usuarios de ECOSUR
520 1 _ a| Deforestation of tropical forests for the establishment of grass monoculture for livestock production is responsible for about 30 % of CO2 emissions. This issue is particularly severe in degraded pastures because degraded soils favor CO2 flow to the soil surface. Silvopastoral systems could reduce CO2 emissions, notably by using live fences. Here, we hypothesized that live fences of Gliricidia sepium in livestock systems should reduce variations in environmental relative humidity and soil temperature and, in turn, reduce soil CO2 emissions. Here, we studied two livestock systems: (1) grass monoculture of Brachiaria decumbens with live fences of G. sepium and (2) grass monoculture of B. decumbens without live fences. We measured soil CO2 seasonal emissions at different times of the day, soil temperature, and environmental relative humidity. Nine 600-m² plots were established in each system. All variables were measured over four 6-h period during a 24-h period, twice a month from April to September. Our results show that soil CO2 emissions showed less variability with G. septum live fences than without live fences. This lower variability is explained by the creation of a microclimate with a higher and more stable environmental relative humidity, provided by the shade of trees. Results also show, however, that global soil CO2 emissions did not differ between the two systems, with and without live fence. Moreover, soil CO2 emissions varied according to season, as shown by 1.082 g CO2 m−² h−¹ in the wet season versus 0.871 g CO2 m−² h−¹ in the dry season. Soil CO2 emissions varied also according to sampling time, as shown by 1.116 g CO 2 m−² h−¹ in the night versus 0.960 CO 2 m−² h−¹ in the morning.
538 _ _ a| Adobe Acrobat profesional 6.0 o superior
650 _ 4 a| Urochloa decumbens
650 _ 4 a| Gliricidia sepium
650 _ 4 a| Dióxido de carbono
650 _ 4 a| Sistemas silvopastoriles
650 _ 4 a| Temperatura del suelo
650 _ 4 a| Cambio climático
650 _ 4 a| Humedad relativa
651 _ 4 a| Tacotalpa (Tabasco, México)
700 1 _ a| Villanueva López, Gilberto
c| Dr.
n| 55822436600
700 1 _ a| Martínez Zurimendi, Pablo
e| coaut.
n| 24465373100
700 1 _ a| Ramírez Avilés, Luis
e| coaut.
700 1 _ a| Aryal, Deb Raj
e| coaut.
700 1 _ a| Casanova Lugo, Fernando
e| coaut.
773 0 _
t| Agronomy for Sustainable Development
g| Vol. 36, no. 1 (March 2016), p. 1-8
x| 1773-0155
901 _ _ a| Artículo con arbitraje
902 _ _ a| VEA / MM
904 _ _ a| Marzo 2016
905 _ _ a| Biblioelectrónica
905 _ _ a| Artecosur
905 _ _ a| Artfrosur
905 _ _ a| Desastres
906 _ _ a| Producción Académica ECOSUR
LNG eng
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Live fences reduce the diurnal and seasonal fluctuations of soil CO2 emissions in livestock systems
Villanueva López, Gilberto (autor)
Martínez Zurimendi, Pablo (autor)
Ramírez Avilés, Luis (autor)
Aryal, Deb Raj (autor)
Casanova Lugo, Fernando (autor)
Nota: Acceso electrónico sólo para usuarios de ECOSUR
Contenido en: Agronomy for Sustainable Development. Vol. 36, no. 1 (March 2016), p. 1-8. ISSN: 1773-0155
No. de sistema: 56901
Tipo: - Artículo con arbitraje
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Inglés

"Deforestation of tropical forests for the establishment of grass monoculture for livestock production is responsible for about 30 % of CO2 emissions. This issue is particularly severe in degraded pastures because degraded soils favor CO2 flow to the soil surface. Silvopastoral systems could reduce CO2 emissions, notably by using live fences. Here, we hypothesized that live fences of Gliricidia sepium in livestock systems should reduce variations in environmental relative humidity and soil temperature and, in turn, reduce soil CO2 emissions. Here, we studied two livestock systems: (1) grass monoculture of Brachiaria decumbens with live fences of G. sepium and (2) grass monoculture of B. decumbens without live fences. We measured soil CO2 seasonal emissions at different times of the day, soil temperature, and environmental relative humidity. Nine 600-m² plots were established in each system. All variables were measured over four 6-h period during a 24-h period, twice a month from April to September. Our results show that soil CO2 emissions showed less variability with G. septum live fences than without live fences. This lower variability is explained by the creation of a microclimate with a higher and more stable environmental relative humidity, provided by the shade of trees. Results also show, however, that global soil CO2 emissions did not differ between the two systems, with and without live fence. Moreover, soil CO2 emissions varied according to season, as shown by 1.082 g CO2 m−² h−¹ in the wet season versus 0.871 g CO2 m−² h−¹ in the dry season. Soil CO2 emissions varied also according to sampling time, as shown by 1.116 g CO 2 m−² h−¹ in the night versus 0.960 CO 2 m−² h−¹ in the morning."


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