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Accueil du site → Doctorat → États-Unis → 1987 → FACTORS AFFECTING THE SPROUTING RESPONSE OF WOODY CAATINGA SPECIES AND THEIR IMPLICATIONS FOR IMPROVED CAATINGA MANAGEMENT

Utah State University (1987)

FACTORS AFFECTING THE SPROUTING RESPONSE OF WOODY CAATINGA SPECIES AND THEIR IMPLICATIONS FOR IMPROVED CAATINGA MANAGEMENT

HARDESTY, LINDA HOWELL

Titre : FACTORS AFFECTING THE SPROUTING RESPONSE OF WOODY CAATINGA SPECIES AND THEIR IMPLICATIONS FOR IMPROVED CAATINGA MANAGEMENT

Auteur : HARDESTY, LINDA HOWELL

Université de soutenance : Utah State University

Grade : Doctor of Philosophy (PhD) 1987

Résumé
Since settlement, caatinga vegetatian lias been subjected to cycles of slash and burn agriculture and wood harvesting with limited understanding of potential forage and wood resource effects. This study was conducted to determine the effects of season of cutting on the coppicing ability of selected tree species in a regenerating stand of caatinga vegetation. A homogeneous stand of matute caatinga was selected in 1982 at Fazenda Iracema and portions were periodicaiiy cleared through one dry/wet season cycle. A randomized biock design was used with three biocks and four treatments of season of cuttlng. Production aí leaf and stem biomass from coppice shoots of three common trees were estimated using a destructive harvest method. Sabia (Mimosa caesalpiniaefolia) and marmeleiro (Croton hemiargyreus) shared a distinctive pattern of response. Significant differences (P<.05) occurred between only twa of the four treatments. The mid-dry season and early wet season treatments yielded similar results, as did the early dry season and late wet season. Cutting during the rnid-dry season or early wet season resulted in greater above ground biomass production than cutting in the early dry season or late wet season. Catingueira (Caesaipinia pyramidalis) showed no significant difference in production regardiess of when the tree was cut. These results suggest that season of cutting could be used to affect forage production and relative species composition af the woody flora

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Page publiée le 12 avril 2015, mise à jour le 28 décembre 2016