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2006
- handle: 10670/1.2wbnuc
- 0378-1844
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http://www.redalyc.org/revista.oa
Interciencia
Mots-clés
Multidisciplinarias (Ciencias Sociales) Seedling Forest Decline Abies religiosa Biomass DistributionSujets proches
Crops--Seedlings Abies FirsCiter ce document
Juan Acosta Montoya et al., « Biomass distribution in declining sacred-fir seedlings », Interciencia, ID : 10670/1.2wbnuc
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Résumé
"In the forests located west and southwest of Mexico City, declineof sacred-fir Abies religiosa (H.B.K.) Schl. et Cham. hasbeen observed for the past 25 years. Characterization of thephenomenon from different viewpoints is important if knowledgeof the problem is to be increased and viable solutions pursued.For this reason, changes in biomass allocation patterns, as aconsequence of decline in 7-year-old seedlings were investigated.A completely randomized experiment with three degrees of damageas treatments: slight, intermediate and severe; and eightreplicates per treatment was established. The biomass of theseedling components was significantly reduced as the damage increased.Root was the most affected organ followed by twigs.However, twigs accumulated biomass through time producing animbalance between aboveground and root biomass. Even thoughthis imbalance is offset by leaf fall, this brings about a furtherreduction in the amount of carbon fixed."