Consulta: subjectFacets:"Relative growth rate"
Registros recuperados: 13
Data/hora: 01/06/2024 16:27:58

Efecto del estrés hídrico y por altas temperaturas sobre algunas características de crecimiento, distribución de biomasa y composición isotópica de carbono de poblaciones de Pinus pinceana
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Martiñón Martínez, Rodrigo Julián.
Con el propósito de determinar las posibilidades de adaptación de Pinus pinceana Gord. a condiciones ambientales asociadas al cambio climático, conocer algunos de los mecanismos fisiológicos involucrados e identificar poblaciones con una mejor respuesta a dichas condiciones, se evaluó el efecto del estrés por sequía y por temperatura sobre el crecimiento, distribución de biomasa, composición isotópica de carbono (δ13C), y tasa relativa de crecimiento (TRC) en plantas de diferentes poblaciones bajo condiciones de invernadero. El diseño experimental incluyó dos ambientes de temperatura, con una diferencia promedio de 2 ºC y dos condiciones de disponibilidad de agua. Los dos factores de estrés ocasionaron una reducción en el crecimiento, la acumulación de...
Tipo: Tesis
Palavras-chave: Adaptación; Cambio climático; Distribución de biomasa; Relación parte aérea-raíz; Variación genética; Δ13C; Eficiencia en el uso del agua; Tasa relativa de crecimiento; Maestría; Forestal; Adaptation; Climate change; Biomass allocation; Shoot-root ratio; Genetic variation; Δ13C; Water use efficiency; Relative growth rate.
Ano: 2009
URL: http://hdl.handle.net/10521/1360

Efecto del estrés hídrico y por altas temperaturas sobre algunas características de crecimiento, distribución de biomasa y composición isotópica de carbono de poblaciones de Pinus pinceana
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Martiñón Martínez, Rodrigo Julián.
Con el propósito de determinar las posibilidades de adaptación de Pinus pinceana Gord. a condiciones ambientales asociadas al cambio climático, conocer algunos de los mecanismos fisiológicos involucrados e identificar poblaciones con una mejor respuesta a dichas condiciones, se evaluó el efecto del estrés por sequía y por temperatura sobre el crecimiento, distribución de biomasa, composición isotópica de carbono (δ13C), y tasa relativa de crecimiento (TRC) en plantas de diferentes poblaciones bajo condiciones de invernadero. El diseño experimental incluyó dos ambientes de temperatura, con una diferencia promedio de 2 ºC y dos condiciones de disponibilidad de agua. Los dos factores de estrés ocasionaron una reducción en el crecimiento, la acumulación de...
Tipo: Tesis
Palavras-chave: Adaptación; Cambio climático; Distribución de biomasa; Relación parte aérea-raíz; Variación genética; Δ13C; Eficiencia en el uso del agua; Tasa relativa de crecimiento Adaptation; Climate change; Biomass allocation; Shoot-root ratio; Genetic variation; Δ13C; Water use efficiency; Relative growth rate.
Ano: 2012
URL: http://hdl.handle.net/10521/1032

Fertilización NPK en árboles de Pinus patula Schl. et Cham.
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Lázaro Dzul, Martha Olivia.
Se estudiaron diferentes dosis de fertilización NPK con relación al crecimiento de follaje nuevo e incremento de área basal, con un experimento factorial completo 33 en una plantación de P. patula Schl. et  Cham. de 10 años de edad, Aquixtla, Puebla, durante  el ciclo 2009-2010.   Los factores fueron N (0, 138, 185), P (0, 15, 21) y K (0, 123, 164) kg ha-1.   Se determinó la tasa relativa de crecimiento instantáneo en volumen y peso seco de follaje nuevo (TRCIVFN y TRCIPSFN) y la tasa relativa de crecimiento promedio de incremento de área basal (TRCPIAB).  La mayor TRCIVFN (0.0255 mL mL-1 día-1) se obtuvo con la dosis 185-0-0 kg ha-1 de NPK.   La TRCIPSFN  presentó los valores más altos con las dosis 138-0-123 y 138-0-0 kg ha-1 de NPK, con valores de...
Palavras-chave: Tasa relativa de crecimiento; Follaje nuevo; Fertilizantes líquidos; Relative growth rate; Foliage; Liquid fertilizers; Maestría; Forestal.
Ano: 2011
URL: http://hdl.handle.net/10521/349

Bio-physiological response of biofilter algal candidate Ulva sp. to different nitrogen forms and fluxes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Moustafa, Yasser T. A.; Bougaran, Gael; Callier, Myriam; Blancheton, Jean-paul.
The present study was carried out to study the long term effect of different nitrogen forms and concentrations (14.3, 28.6 and 57.1 µM N-NH4 and 214, 2360 and 3700 µM N-NO3) on the photosynthesis and relative growth rate (RGR) of Ulva sp. for five weeks. Nutrient-enriched seawater was supplied at an exchange rate of between 12.6 and 14.4 volumes per day. Relative growth rate was determined weekly. Photosynthetic oxygen evolution response was measured using 20 - 25 mg fresh weight seaweed incubated in a DW3 measuring chamber for 56 min under different irradiances with light and dark periods alternating every seven minutes. Photosynthetic light-response curves were drawn using 15 photosynthetic oxygen evolution readings normalized to dry weight. Experimental...
Tipo: Text
Palavras-chave: Ulva sp.; Photosynthetic oxygen evolution; Relative growth rate; Nitrogen forms; Nutrients uptake.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00251/36259/34807.pdf

Crescimento e qualidade de mudas de Inga laurina em função do substrato e adubação suplementar
Provedor de dados: PFB - Pesquisa Florestal Brasileira
Autores: de Jesus, Murilo Figueredo Campos; de Souza Júnior, José Olimpio; Góes, Gabriel Salles; Brito-Rocha, Ediófila; Mielke, Marcelo Schramm.
O objetivo deste estudo foi avaliar o efeito de misturas de um substrato comercial e pó de fibra de coco (PFC) no crescimento e na qualidade de mudas de Inga laurina (Sw.) Willd. (Fabaceae). Tubetes de polietileno foram preenchidos com quatro misturas do substrato comercial HS Florestal® (HSF) e PFC nas proporções: T1 = 100% HSF; T2 = 80% HSF + 20% PFC; T3 = 60% HSF + 40% PFC e T4 = 40% HSF + 60% PFC. Os experimentos foram realizados de forma independente, em presença (experimento I) e ausência (experimento II) de adubação suplementar. Foram realizadas avaliações de crescimento e qualidade das mudas ao final dos experimentos, aos 81 dias (experimento I) e 110 dias (experimento II) após a repicagem. Concluiu-se que o uso da adubação suplementar não...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dickson quality index; Relative growth rate; Forest restoration Viveiros Florestais Índice de qualidade de Dickson; Taxa de crescimento relativo; Restauração florestal.
Ano: 2016
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/917

Single-trait bayesian analysis of some growth traits in japanese quail
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Karaman,E; Firat,MZ; Narinc,D.
The aim of this study was to estimate the heritability for some growth traits of Japanese quail through the estimation of variance components by Bayesian methodology. For this purpose, 340 progenies of 34 sires were used. Live weight (LW42) and absolute and relative growth rates at 42 days of age (AGR42 and RGR42, respectively) were submitted to single-trait analysis under a sire model. A software (package MCMCglmm) was used for the estimations, and a single chain with 65,000 rounds was run for each trait with a thinning interval of 50. Burn-in was set at 15,000 and inferences were built on posterior samples of 1,000 draws for each trait. All marginal posterior densities were unimodal and marginal posterior distributions of sire variance are slightly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Absolute growth rate; Bayesian; Heritability; Quail; Relative growth rate.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000200007

Responses of six Brachiaria spp. accessions to root zone flooding
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Caetano,Luana Pabla de Souza; Dias-Filho,Moacyr Bernardino.
Some morphophysiological responses of Brachiaria brizantha cv. Marandu, cv. Piatã, cv. Arapoty, B163, B166 and B. ruziziensis R124 were compared in plants grown in pots, under flooded and well-drained conditions. Flooding reduced leaf elongation rate in all accessions. Leaf dry mass production was lower under flooding than in the control plants in all the studied accessions, except in cv. Piatã. Root dry mass production was reduced by flooding in cv. Marandu and in R124, while the proportion of biomass allocated to roots was reduced by flooding only in R124. It was not possible to detect significant differences between water regimes in the percentage of biomass allocated to culms and leaves for all accessions. Flooding decreased the number of tillers in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass allocation; Brachiaria brizantha; Leaf elongation rate; Photosynthesis; Relative growth rate.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982008000500003

Weight and morphometric growth of different strains of tilapia (Oreochromis sp)
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Allaman,Ivan Bezerra; Reis Neto,Rafael Vilhena; Freitas,Rilke Tadeu Fonseca de; Freato,Thiago Archangelo; Lago,Aline de Assis; Costa,Adriano Carvalho; Lima,Renato Ribeiro de.
The objective of this study was to evaluate the morphometric growth and weight gain of strains of tilapia (Thai, Red, UFLA and Commercial) by nonlinear models. Initially, 500 male fingerlings of each strain, at 85 (Red and UFLA) and 86 (Thai and Commercial) days of age, were stocked separately in raceways with 56 m³. Twenty fish of each strain were randomly sampled, weighed and measured monthly. Five nonlinear models (Brody, von Bertalanffy, Gompertz, logistic and exponential) were tested, choosing one that best fit to the data. The variables studied were: weight, standard length (SL), head length (HL), height 1 (H1), height 2 (H2), height 3 (H3), first distance (D1), second distance (D2), first width (W1), second width (W2) and third width (W3). The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Absolute growth rate; Aquaculture; Nonlinear models; Relative growth rate.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000500001

Macronutrients uptake rate and biomass partitioning during early growth of Jatropha plants
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: Santos,Elcio Ferreira; Macedo,Fernando Giovannetti; Zanchim,Bruno José; Camacho,Marcos Antonio; Lavres,José.
ABSTRACT Jatropha seeds oil can replace fossil fuels, but the nutrient supply management for this species is not fully described. The objective with this work was to establish curves of macronutrient (nitrogen - N; phosphorus - P; potassium - K; calcium - Ca; magnesium - Mg and sulfur - S) content in leaves, stem and roots, and to evaluate the relative growth rate (RGR), absolute growth rate (AGR) and the foliar mass ratio (FMR). The experiment was arranged in completely randomized design with five replications. Jatropha plants were grown in nutrient solution and collected at intervals of 14 up to 119 days after treatments started. The period of highest uptake of nutrients occurred from 7 to 35 days after treatments started, which coincides with highest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Jatropha curcas; Nutrient uptake; Relative growth rate; Macronutrients uptake curves; Macronutrient uptake rates.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000400565

Growth of citrus rootstocks under aluminium stress in hydroponics
Provedor de dados: Scientia Agricola
Autores: Pereira,Walter Esfrain; Siqueira,Dalmo Lopes de; Puiatti,Mario; Martínez,Carlos Alberto; Salomão,Luiz Carlos Chamhum; Cecon,Paulo Roberto.
Plants present different degrees of adaptation to aluminium (Al) concentrations in the soil, and the understanding of this characteristic can lead to a viable option for the utilization of acid soils. The objective of this experiment was to evaluate the effects of five Al concentrations (0, 50, 100, 200, and 400 mumol L-1) on the growth of 'Rangpur' lime (Citrus limonia Osbeck) and 'Volkamer' lemon (Citrus volkameriana Hort. ex Tan.), and tangerine rootstocks 'Cleópatra' (Citrus reshni Hort. ex Tan) and 'Sunki' (Citrus sunki Hort. ex Tan.), in hydroponic culture. The treatments were arranged in a randomized block design, with four replications. For all rootstocks, the relative growth rate in terms of plant total fresh matter increased under low and,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus sp.; Relative growth rate; Principal components; Nutrient solution.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000100006

Root growth and proton efflux rates of rice seedlings in a greenhouse environment
Provedor de dados: Acta Botanica Brasilica
Autores: França,Marcel Giovanni Costa; Rossiello,Roberto Oscar Pereyra; Ramos,Flávia Toledo; Zonta,Everaldo.
Growth patterns and mean proton efflux rates (E H+) in roots of rice seedlings (Oryza sativa cv. IAC 47) grown under light conditions in a greenhouse environment were studied. Fifteen days after emergence, seedlings were transferred to pots containing 3.7 L of nutrient solution with 1.43 mmol NNH4+ L¹ as the sole source of nitrogen, to induce four sequential cycles of solution acidification, starting with a pH value of 5.3. Mean proton effluxes were computed based on growth periods of 48 h (from 0 to 192 h). E H+ values were estimated from values of relative root growth rates (RGR), expressed as root area (RA) or fresh mass (FM), and the linear coefficient of the regression of total free protons in nutrient solution (U H+) on RA or FM. Total free protons...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Root area; Fresh root mass; Relative growth rate; Acidification gradient.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062006000100003

Growth, photosynthesis and stress indicators in young rosewood plants (Aniba rosaeodora Ducke) under different light intensities
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Gonçalves,José Francisco de Carvalho; Barreto,Denize Caranhas de Sousa; Santos Junior,Ulysses Moreira dos; Fernandes,Andreia Varmes; Sampaio,Paulo de Tarso Barbosa; Buckeridge,Marcos Silveira.
Aniba rosaeodora is an Amazonian tree species that belongs to the family Lauraceae. Due to intense exploitation for extraction of essential oils (mainly linalol), A. rosaeodora is now considered an endangered species. On the other hand, there is little information about its ecophysiology which would be useful to support future forest planting programs. Hence, the effect of different light intensities on the growth and photosynthetic characteristics of young plants of A. rosaeodora was studied. Nine-month-old plants were subjected to four light treatments (T1= 10 a 250 µmol.m-2.s-1 / control; T2=500 to 800, T3=700 to 1000 and T4=1300 to 1800 µmol.m-2.s-1 / full sunlight). Allometric variables, gas exchange, contents of pigments and chlorophyll a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chlorophyll a fluorescence; Chloroplast pigment contents; Gas exchanges; Photochemical efficiency of photosystem II; Relative growth rate; Tropical species.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000300007

Seedling vigor variation among 80 recombinant chromosome substitution lines (RCSL) of barley (Hordeum vulgare)
Provedor de dados: Ciencia e Investigación Agraria, Revista Latinoamericana en Ciencias de la Agricultura
Autores: Inostroza,Luis; Quezada,Celerino; Inostroza,Wladimir; Matus,Iván; Tapia,Maritza; del Pozo,Alejandro.
The seedling vigor of 80 barley recombinant chromosome substitution lines (RCSLs) was measured for selecting high seedling vigor genotypes. The RCSLs were derived from a cross between H. vulgare subsp. spontaneum and H. vulgare subsp. vulgare 'Harrington'. The work was carried out under greenhouse conditions during the summer of 2008. The experimental design was an alpha lattice with 3 replicates. In each replicate, 40 plants were established, distributed in eight polyethylene pots containing sand as substrate, which were fertilized an irrigated. The emergence of seedlings, number of leaves and shoots, dry matter of leaves, shoots and roots and leaf area of fully expanded leaves were measured. In addition, growth indices were calculated: emergence rate,...
Tipo: Journal article
Palavras-chave: Plant growth analysis; Relative growth rate; Net assimilation rate; Allometric coefficient.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100013