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No. de sistema: 000045398

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008 _ _ 080602m20069999ne^mr^p^^^^^^z0^^^a|eng^d
040 _ _ a| ECO
c| ECO
043 _ _ a| n-mx-cp
044 _ _ a| ne
100 1 _ a| Diemont, Stewart A. W.
245 1 0 a| Emergy evaluation of Lacandon Maya indigenous swidden agroforestry in Chiapas, Mexico
520 1 _ a| The Lacandon Maya of Chiapas, Mexico practice a system of swidden agroforestry that mimics the surrounding ecosystem and its successional stages. Their fields rotate through grass (milpa), and shrub (acahual) and forest fallow stages that regenerate soil, nutrients, and seed banks. Each successional stage, including the fallow stages, produces over 25 types of crops, raw materials, and medicines. Lacandon traditionally do not use fertilizers, pesticides or herbicides. An emergy evaluation of Lacandon agroforestry was conducted to quantify resource use, productivity, environmental impact, and overall sustainability. Six systems were analyzed. The Emergy Yield Ratios of the systems ranged from 4.5 to 50.7, which indicated a high level of output per purchased investments. The agroforestry systems had minimal environmental impacts as shown by Environmental Loading Ratios between 0.03 and 0.38. The Emergy Sustainability Index (ESI) of the systems ranged from 12 to 1740, indicating a high level of sustainability. The high ESI values were partially due to a large fraction of renewable resources that varied from 0.72 to 0.97. ESI was dependent upon land area devoted to the system for each family, where greater land area resulted in higher values of ESI. Labor invested did not exhibit a direct effect on sustainability.
650 _ 4 a| Sistemas agroforestales
650 _ 4 a| Lacandones
650 _ 4 a| Impacto ambiental
650 _ 4 a| Agricultura sostenible
651 _ 4 a| Lacanjá Chansayab, Ocosingo (Chiapas, México)
700 1 _ a| Martin, Jay F.
e| coaut.
700 1 _ a| Levy Tacher, Samuel Israel
e| coaut.
773 0 _
t| Agroforestry Systems
g| Vol. 66 (2006), p. 23-42
x| 0167-4366
900 _ _ a| En hemeroteca, SIBE-San Cristóbal
902 _ _ a| AM/MM/DPH
904 _ _ a| Junio 2008
905 _ _ a| Artecosur
905 _ _ a| Artfrosur
905 _ _ a| Servibosques
905 _ _ a| CRIIS
905 _ _ a| Biblioelectrónica
LNG eng
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*En hemeroteca, SIBE-San Cristóbal
Emergy evaluation of Lacandon Maya indigenous swidden agroforestry in Chiapas, Mexico
Diemont, Stewart A. W. (autor)
Martin, Jay F. (autor)
Levy Tacher, Samuel Israel (autor)
Contenido en: Agroforestry Systems. Vol. 66 (2006), p. 23-42. ISSN: 0167-4366
Bibliotecas:
San Cristóbal
No. de sistema: 45398
Tipo: Artículo
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Inglés

"The Lacandon Maya of Chiapas, Mexico practice a system of swidden agroforestry that mimics the surrounding ecosystem and its successional stages. Their fields rotate through grass (milpa), and shrub (acahual) and forest fallow stages that regenerate soil, nutrients, and seed banks. Each successional stage, including the fallow stages, produces over 25 types of crops, raw materials, and medicines. Lacandon traditionally do not use fertilizers, pesticides or herbicides. An emergy evaluation of Lacandon agroforestry was conducted to quantify resource use, productivity, environmental impact, and overall sustainability. Six systems were analyzed. The Emergy Yield Ratios of the systems ranged from 4.5 to 50.7, which indicated a high level of output per purchased investments. The agroforestry systems had minimal environmental impacts as shown by Environmental Loading Ratios between 0.03 and 0.38. The Emergy Sustainability Index (ESI) of the systems ranged from 12 to 1740, indicating a high level of sustainability. The high ESI values were partially due to a large fraction of renewable resources that varied from 0.72 to 0.97. ESI was dependent upon land area devoted to the system for each family, where greater land area resulted in higher values of ESI. Labor invested did not exhibit a direct effect on sustainability."

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Artículos de investigación ECOSUR