Modelagem de crescimento e produção usando o modelo Simflora.

Importância da modelagem de dinâmica florestal na Amazônia Brasileira; Modelagem de crescimento e produção usando o Simflora; Outros documentos disponíveis; Instalação; Simulações únicas; Dados; Começando; Janelas de exibição; Rodando o modelo; Resultados; Simulando silvicultura; A escolha de módulos e valores dos parâmetros; Exemplo; Simulações múltiplas; Começando uma simulação múltipla; Criando um arquivo de dados de saída; Rodando simulações múltiplas; Examinando e analisando os resultados; Experiências de uso do Simflora e suas implicações para políticas públicas; Indonésia; Guiana Inglesa; Brasil; Padrões observados em relação à exploração madeireira e às lacunas de conhecimento de dinâmica florestal de diferentes países tropicais

A novel system for spatial and temporal imaging of intrinsic plant water use efficiency

Instrumentation and methods for rapid screening and selection of plants with improved water use efficiency are essential to address current issues of global food and fuel security. A new imaging system that combines chlorophyll fluorescence and thermal imaging has been developed to generate images of assimilation rate (A), stomatal conductance (gs), and intrinsic water use efficiency (WUEi) from whole plants or leaves under controlled environmental conditions. This is the first demonstration of the production of images of WUEi and the first to determine images of gs from themography at the whole-plant scale. Data are presented illustrating the use of this system for rapidly and non-destructively screening plants for alterations in WUEi by comparing Arabidopsis thaliana mutants (OST1-1) that have altered WUEi driven by open stomata, with wild-type plants. This novel instrument not only provides the potential to monitor multiple plants simultaneously, but enables intra- and interspecies variation to be taken into account both spatially and temporally. The ability to measure A, gs, and WUEi progressively was developed to facilitate and encourage the development of new dynamic protocols. Images illustrating the instrument's dynamic capabilities are demonstrated by analysing plant responses to changing photosynthetic photon flux density (PPFD). Applications of this system will augment the research community's need for novel screening methods to identify rapidly novel lines, cultivars, or species with improved A and WUEi in order to meet the current demands on modern agriculture and food production. © The Author 2013. Published by Oxford University Press on behalf of the Society for Experimental Biology

Estimate of Leaf Area Index in an Old-Growth Mixed Broadleaved-Korean Pine Forest in Northeastern China

Leaf area index (LAI) is an important variable in the study of forest ecosystem processes, but very few studies are designed to monitor LAI and the seasonal variability in a mixed forest using non-destructive sampling. In this study, first, true LAI from May 1st and November 15th was estimated by making several calibrations to LAI as measured from the WinSCANOPY 2006 Plant Canopy Analyzer. These calibrations include a foliage element (shoot, that is considered to be a collection of needles) clumping index measured directly from the optical instrument, TRAC (Tracing Radiation and Architecture of Canopies); a needle-to-shoot area ratio obtained from shoot samples; and a woody-to-total area ratio. Second, by periodically combining true LAI (May 1st) with the seasonality of LAI for deciduous and coniferous species throughout the leaf-expansion season (from May to August), we estimated LAI of each investigation period in the leaf-expansion season. Third, by combining true LAI (November 15th) with litter trap data (both deciduous and coniferous species), we estimated LAI of each investigation period during the leaf-fall season (from September to mid-November). Finally, LAI for the entire canopy then was derived from the initial leaf expansion to the leaf fall. The results showed that LAI reached its peak with a value of 6.53 m2 m−2 (a corresponding value of 3.83 m2 m−2 from optical instrument) in early August, and the mean LAI was 4.97 m2 m−2 from May to November using the proposed method. The optical instrument method underestimated LAI by an average of 41.64% (SD = 6.54) throughout the whole study period compared to that estimated by the proposed method. The result of the present work implied that our method would be suitable for measuring LAI, for detecting the seasonality of LAI in a mixed forest, and for measuring LAI seasonality for each species

Growth and yield modelling : applications of SYMFOR to evaluate silvicultural systems/ Gardingen

iv, 65 hal.: ill.; 27 cm

Growth and yield modelling : applications of SYMFOR to evaluate silvicultural systems/ Gardingen

iv, 65 hal.: ill.; 27 cm

Growth and yield modelling : applications of SYMFOR to evaluate silvicultural systems/ Gardingen

iv, 65 hal.: ill.; 27 cm

Growth and yield modelling : applications of SYMFOR to evaluate silvicultural systems/ Gardingen

iv, 65 hal.: ill.; 27 cm