Biomass Allocation
Mostrando 13-24 de 47 artigos, teses e dissertações.
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13. Resprouting ability and intensity after damage in seedlings of the large-seeded species Araucaria angustifolia
The role of seed reserves on the ability to resprout and on the responses of resprouting in Araucaria angustifoliawas investigated. Seedlings were separated into three groups: plants which had their shoot damaged, a similar group in which damaged plants had their connection to the supporting seed removed, and a control group. All damaged seedlings resprouted
Braz. J. Plant Physiol.. Publicado em: 2012-06
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14. Temporal variations in the primary productivity of Eleocharis acutangula (Cyperaceae) in a tropical wetland environment
Wetland vegetation typically includes aquatic macrophytes with high primary production capacities. The present study investigated how hydrological variations affect biomass allocation and primary productivity in the emergent macrophyte Eleocharis acutangula (Roxb.) Schult. Eleocharis acutangula ramets were collected from the Campelo Lagoon flood plain (21°3
Braz. J. Bot.. Publicado em: 2012
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15. Germination, initial growth, and biomass allocation in three native Cerrado species
The parameters of germination, initial growth, and biomass allocation of three native plant species of Cerrado (Copaifera langsdorffii, Dipteryx alata and Kielmeyera coriacea) were established. The species had germination percentages above 88% and average germination times longer than 139 hours. The average time for the opening of the first leaf pair was mor
Braz. J. Bot.. Publicado em: 2012
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16. Relationships between crown architecture and available irradiance in two cerrado species with different leaf phenologies
Structural differences between cerrado species with different leaf phenologies are linked to crown architecture, leaf production, and biomass allocation to shoots and leaves. The present study characterized crown structures and the patterns of biomass allocation to leaves and shoots in two woody cerrado species with contrasting leaf phenologies and quantifie
Braz. J. Bot.. Publicado em: 2012
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17. Aspectos fisiológicos e da produção do arroz em resposta ao silício / Physiological and productive aspects of rice plants according to silicon supplying
The objective of this study was to analyze the role of supplemental silicon (Si) in the biomass accumulation and grain yield of rice (Oryza sativa L.). Different experiments were carried out in which wild rice plants (japonica subsp. Oochikara - WT) and mutant defective for the absorption of Si - lsi1 (Low silicon rice 1) were raised under hydroponics condit
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/2011
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18. CALIBRATION THE MODEL 3-PG FOR Eucalyptus saligna IN THE REGION OF GUAÍBA, RS / CALIBRAÇÃO DO MODELO 3-PG PARA Eucalyptus saligna Smith NA REGIÃO DE GUAÍBA, RS
O trabalho teve como objetivo principal calibrar o modelo 3-PG para Eucalyptus saligna na região de Guaíba, RS para as varáveis diâmetro à altura do peito (DAP), altura total, volume de madeira e biomassa de stem (galho, casca e lenho). O estudo ocorreu na região de Guaíba, RS, sendo utilizados plantios clonais de Eucalyptus saligna, em diversos espa�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2011
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19. Biochemical and physiological responses of sugarcane cultivars to soil water deficiencies
For sugarcane (Saccharum spp.) crops, the effects of an environmental stress, especially water deficiency, may cause severe productivity reduction, inferring negatively in the sugarcane industry. The tolerance of two sugarcane cultivars to a lack of water was made by analyzing the levels of the osmoprotectors, trehalose and free proline, and the biometrical
Scientia Agricola. Publicado em: 2011-08
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20. Physiological responses of two tropical weeds t shade. I. Growth and biomass allocation.
Ipomoea asarifolia (Desr.) Roem. & Schultz (Convolvulaceae) and Stachytarpheta cayennensis (Rich) Vahl. (Verbenaceae), two weeds found in pastures and crop areas in Brazilian Amazonia, were grown in controlled environment cabinets under high (800-1000 umol m-2 s-1) and low (200-350 umol m-2 s-1) light regimes during a 40-day period. For both species leaf dry
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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21. Interferencia interespecifica entre amaranthus hybridus L. e amaranthus viridus L.
O objetivo deste trabalho foi estudar a interferencia interespecifica entre duas especies de Amaranthus - A. viridis e A. hybridus -, esta ultima com dois biotipos distintos (verde e roxo); ambas ocorriam associadas em dois locais. Nas populacoes de cada local foram feitos ensaios de substituicao independentes, em vasos, nos quais observou-se que as populaco
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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22. Competicao intra-especifica entre Amaranthus hybridus L. e Amranthus viridis L.
Ensaios de competicao intra-especifica foram conduzidos sobre Amaranthus viridis L. e A. hybridus L., a ultima especie com dois biotipos distintos, tipo verde e tipo roxo. Os tres ensaios, conduzidos separadamente, utilizaram cinco densidades de sementes por vaso. Em termos gerais, as sementes germinadas foram a razao do surgimento da proxima geracao, visto
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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23. Growth and biomass allocation of the C4 grasses Brachiaria brizantha and B. Humidicola under shade.
O crescimento e a alocacao de biomassa das gramineas forrageiras tropicais Brachiaria brizantha cv. Marandu e B. humidicola foram comparados, em plantas cultivadas em vasos, a pleno sol e a 70% de interceptacao da luz solar, durante um periodo de 30 dias. O objetivo foi avaliar a capacidade de aclimatacao dessas especies ao sombreamento. Ambas as especies mo
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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24. Tolerância ao alagamento em cinco acessos de Brachiaria brizantha. / Tolerance to flooding in five Brachiaria brizantha accessions
Algumas respostas morfológicas e fisiológicas de cinco acessos de Brachiaria brizantha (BRA000591 cultivar Marandu, BRA003441, BRA002844, BRA004308 e BRA004391) foram comparadas em plantas cultivadas em vasos, sob condições de solo alagado e bem drenado, durante 14 dias. O alagamento reduziu significativamente a produção de massa seca foliar em todos o
Pesquisa Agropecuária Brasileira. Publicado em: 2011