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Variability of the Leaf Area Index in natural fields and transition forest in S...
Jordão, Walleson Higor Corrêa; Zanchi, Fabrício Berton; Ferreira, Domkarlykisom Mahamede Moraes; Pagani, Caio Henrique Patrício; Luizão, Flávio JesusThe Leaf Area Index (LAI) has strong influence on ecosystems’ energy and mass exchange and is fundamental to the understanding of regional climate changes and ecosystem dynamics. The main goal of this work was to establish, based on geostatistical analyses, the variability and spatial dependence of LAI in the natural fields and transitional forest in southern Amazonas State, in Brazil. The LAI was measured in a...
Soil CO2 efflux in central Amazonia: environmental and methodological effects
Zanchi, Fabrício Berton; Waterloo, Maarten J.; Kruijt, Bart J.; Kesselmeier, Jürgen; Luizão, Flávio Jesus; Manzi, Antônio Ocimar; Dolman, Albertus J.Respiração do solo possui um importante papel no ciclo do carbono em florestas tropicais Amazônicas. Entretanto poucas medidas de respiração do solo foram feitas. Neste estudo são apontados os efeitos na metodologia de instalação dos anéis no solo, bem como os efeitos da precipitação e a distribuição espacial da emissão de CO2 na Amazônia central. Os efeitos da inserção de anéis no solo aumentaram de 13 a 20% p...
Estimate of the Leaf Area Index (LAI) and Biomass in pasture in the state of Ro...
Zanchi, Fabrício Berton; Waterloo, M. J.; Aguiar, Leonardo José Gonçalves; Von Randow, Celso; Kruijt, Bart J.; Cardoso, Fernando LuizMonthly measurements of the grass height, total above-ground biomass and the proportions of live and dead biomass, Specific Leaf Area (SLA) and Leaf Area Index (LAI) were made in one cattle ranch at the Fazenda Nossa Senhora (FNS) (February of 1999 to January of 2005) and also in Rolim de Moura (RDM) (February to March of 1999) in Rondônia state. The predominant grass species is Urochloa brizantha (Hochst. ex A...