Daylength
Mostrando 1-12 de 43 artigos, teses e dissertações.
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1. Exclusão pulmonar em neonatos - técnicas e o papel do ultrasom
ABSTRACT We analyzed the phenological responses of shrub-tree species of lowland deciduous (LDF) and submontane deciduous (SFD) forests in the Pantanal, and assessed their relationships with climatic factors at the community level and with strategies for seed dispersal. Vegetative and reproductive phenophases of 50 tree-shrub species were monitored monthly (
Rev. Bras. Anestesiol.. Publicado em: 2020-06
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2. Phenology and dispersal syndromes of woody species in deciduous forest fragments of the Pantanal in Mato Grosso do Sul State, Brazil
ABSTRACT We analyzed the phenological responses of shrub-tree species of lowland deciduous (LDF) and submontane deciduous (SFD) forests in the Pantanal, and assessed their relationships with climatic factors at the community level and with strategies for seed dispersal. Vegetative and reproductive phenophases of 50 tree-shrub species were monitored monthly (
Acta Bot. Bras.. Publicado em: 2020-06
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3. Key factors that influence for seasonal production of Guinea grass
ABSTRACT: Climate, soil and management are the main drives for growth and production of tropical pastures. Thus, a better understanding of the effects of these factors and their interactions under climate conditions is required to obtain effective management options. Here, we used data from two field trials to research on climate and management interactions
Sci. agric. (Piracicaba, Braz.). Publicado em: 2018-05
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4. Respostas morfofisiológicas de genótipos de Brachiaria spp. sob duas intensidades de desfolhação e modelagem da produção de forragem em função das variações estacionais da temperatura e fotoperíodo: adaptação do modelo CROPGRO / Morphological and physiological responses of Brachiaria spp. grasses under two defoliation intensities and modeling forage yield as a function of seasonal variations of temperature and daylength: adaptation of the CROPGRO model
Para poder compreender e descrever o crescimento das plantas forrageiras é necessário ter conhecimento acerca de seus aspectos agronômicos e morfofisiológicos e suas respostas aos fatores edafoclimáticos. O desenvolvimento de ferramentas que viabilizem a racionalização dessas inter-relações é de grande importância para a comunidade científica, ao
Publicado em: 2011
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5. Respostas morfofisiológicas de cinco cultivares de Brachiaria spp. às variações estacionais da temperatura do ar e do fotoperíodo / Morphological and physiological responses of five Brachiaria spp. cultivars to seasonal variations to air temperature and daylength
A pecuária brasileira é baseada no uso de pastagens. Entretanto, o padrão estacional do clima determina a maior concentração da produção de forragem nos períodos de primavera e verão. O conhecimento das respostas produtivas e morfofisiológicas das principais espécies e cultivares forrageiros à temperatura e ao fotoperíodo, na ausência de défic
Publicado em: 2007
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6. Produção de forragem de capins do gênero Panicum e modelagem de respostas produtivas e morfofisiológicas em função de variáveis climáticas. / Forage yield of Panicum grasses and modeling yield, morphological and physiological traits in response to climatic variables.
The brazilian livestock industry is based on the use of tropical pastures with high production potential which benefits from favorable environmental conditions over the year. However, the seasonal pattern of climatic conditions, mainly temperature and daylength, concentrates most of the annual forage accumulation during the spring and summer. Thus, knowing t
Publicado em: 2004
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7. Avaliação de modelos matemáticos desenvolvidos para auxiliar a tomada de decisão em sistemas de produção de ruminantes em pastagens. / Evaluation of mathematical models developed to aid decision-making in pasture-based ruminant production systems.
In agricultural systems, environment, soil, animals and plants are indissociable components of the production process. Furthermore, the production time-frame is relatively long. These characteristics enhance risk and uncertainty associated with decision alternatives made during the process. One tool which can aid in decision-making in these processes is the
Publicado em: 2003
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8. Determinação de parâmetros produtivos e qualitativos de Cynodon spp. em função de variáveis climáticas / Predicting yield and qualitative characteristics of Cynodon spp. in response to climatic variables
As pastagens são o principal recurso alimentar para pecuária brasileira, sendo fundamentais na viabilização dos sistemas produtivos. Fatores climáticos como temperatura e fotoperíodo têm grande importância no crescimento das plantas forrageiras, influenciando o acúmulo de forragem a distribuição estacional da produção e do valor nutritivo, fator
Publicado em: 2003
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9. Dinamica da dispersão de sementes e regeneração de plantas da planicie litoranea da Ilha do Mel, PR
(Seed dispersal and plant regeneration dynamics in a Sandy Coastal Plain on Ilha do Mel, southern Brazil): The island Ilha do Mel is located in the municipality of Paranaguá (25°29 /25°34 32"S e 48°17 15"/48°23 16"W) in the central coastal region of Paraná State, Brazil and comprises 2760ha. The higher areas above the Sandy Coastal Plain contains very
Publicado em: 2002
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10. Cultivo in vitro, crescimento e floração in vivo de especies de Clusia L. (Guttiferae)
The genus Clusia L. (Guttiferae) is characterized by species that produce secondary metabolic compounds of recognized biological activity. An attempt was made to identify patterns of physiological response related to the compound production in order to facilitate their study and haracterization. This study investigated two physiological aspects of Clusia spe
Publicado em: 1999
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11. Effect of Daylength on the Ability of Salicylic Acid to Induce Flowering in the Long-day Plant Lemna gibba G3 and the Short-day Plant Lemna paucicostata 6746
When the long-day plant Lemna gibba L., strain G3 is grown on control medium the critical daylength is just under 10 hours. With 3.2 micromolar salicylic acid added to the medium substantial flower promotion is obtained on 9-, 10-, and 11-hour daylengths. On an 8-hour daylength salicylic acid treatment results in only a very small flowering response, and wit
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12. Effects of Variations in Daylength and Temperature on Net Rates of Photosynthesis, Dark Respiration, and Excretion by Isochrysis galbana Parke 1
The effects of variable daylength and temperature on net rates of photosynthesis, dark respiration, and excretion of a unicellular marine haptophyte, Isochrysis galbana Parke, were examined and related to division rates. Six combinations of daylength (18:6, 12:12, 6:18 light:dark, LD) and temperature (20, 25 C) were used. Daily rates of net photosynthesis we