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Accueil du site → Master → Etats Unis → 1983 → Examination of field techniques for the estimation of above ground biomass on five Chihuahuan Desert shrub species

New Mexico State University (1983)

Examination of field techniques for the estimation of above ground biomass on five Chihuahuan Desert shrub species

Molinero HB

Titre : Examination of field techniques for the estimation of above ground biomass on five Chihuahuan Desert shrub species

Auteur : Molinero HB

Université de soutenance : New Mexico State University

Grade : Master of Science (MS) 1983

Résumé
A group of common Chihuahuan Desert shrubs having highly varied growth forms were studied in an attempt to see if standardized field measurement techniques could be used for the prediction of above ground biomass. The most efficient (best estimation for least time expenditure) field measurement was obtained for each species. It was found that the techniques yielded reliable results for plants which were of medium to large size for the species, but biomass predictions were unreliable from measurements made upon plants which were small (reproduction) for the species. It was found that it is not necessary to obtain volume or canopy area values to estimate biomass, but that single field measurements could be used. Formulas were developed for these measurements. The biomass of two species, Larrea tridentata and Acacia constricta, which have growth forms resembling an inverted cone, could be most efficiently estimated using a single field measurement-internal height. In the case of two other species, Gutierrezia sarothrae and Krameria parvifolia, which tend to be more compact and regularly globose a single measurement-maximum diameter was the most efficient biomass estimator. External height measurements were found to be the best for Flourensia cernua.

Mots Clés : Acacia,biomass estimate, biomass,shrub, , Flourensia,biomass estimate, Gutierrezia, Gutierrezia,biomass estimate, Krameria,biomass estimate, Larrea,biomass estimate, shrub,biomass estimate, technique, shrub

Jornada NMSU

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Page publiée le 14 mai 2016, mise à jour le 24 décembre 2019