Consulta: subjectFacets:"Dry mass"
Registros recuperados: 18
Data/hora: 11/06/2024 05:28:12

Sombra artificial y aplicación de thidiazurón en el crecimiento y fisiología de la vainilla (Vanilla planifolia Andrews).
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Olivares Soto, Héctor Miguel.
El objetivo de esta investigación es documentar el efecto de diferentes niveles de sombra artificial y la aplicación de TDZ sobre el número y crecimiento de brotes laterales, en la producción y distribución de la materia seca en la planta de vainilla así como el efecto en parámetros fisiológicos del intercambio de gases. Para ello, se trabajó con esquejes de vainilla, con ocho yemas. Los  niveles de sombra fueron 30, 50 y 70 %  y  0, 500  y 1000 mg-litro-1 de Thidiazurón. Se midió longitud  y diámetro de brotes, número de hojas, tasa de fotosíntesis aparente (FA), transpiración (Tr), conductancia estomática (CE), concentración intercelular de CO2 (CINT), área foliar total por planta y la distribución de peso seco a en los componentes de la planta.  No hubo...
Palavras-chave: Vanilla planifolia A.; Regulador de crecimiento; Longitud de brote; Intercambio gaseoso; Area foliar; Fotosíntesis; Materia seca; Vanilla planifolia Andrews; Growth regulator; Shoot length; Gas exchange; Total upper leaf surface; Photosynthesis; Dry mass; Maestría; Fruticultura.
Ano: 2010
URL: http://hdl.handle.net/10521/252

Hydroponic rocket salad growth and production according to different color profiles
Provedor de dados: Horticultura Brasileira
Autores: Schmidt,Denise; Gabriel,Vilson J; Caron,Braulio O; Souza,Velci Q; Boscaini,Ricardo; Pinheiro,Renes R; Cocco,Carine.
ABSTRACT The aim of this study was to evaluate the influence of different profile colors based on nutrient flux on microclimate, growth and yield of four rocket cultivars. The experiment was conducted during four months in a protected environment in the NLT system, which consisted of benches composed of eight hydroponic profiles for the plants conduction. The treatments were arranged in a 4x2x2 factorial design, with four cultivars (Cultivada, Folha Larga, Rococo and Runway), two color profiles (black and white) and two growing seasons (autumn and winter). The experiments were conducted in a randomized block design with three replications. The evaluations were realized on every four days, throughout the growth period. Leaves fresh and dry mass, stems and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eruca sativa; NLT; Temperature; Dry mass; Yield.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362017000100111

Estimation of aerial biomass of dry forest species from north of Bahia State, Brazil
Provedor de dados: PFB - Pesquisa Florestal Brasileira
Autores: Mendonça, Andrea Vita Reis; Souza, Josival Santos; Giulietti, Ana Maria; Van Den Berg, Cassio.
Allometric equations were developed for estimating individual plant biomass for ten species in an area of dry forest in northern of Bahia State, Brazil in the medium-lower São Francisco Basin, in Casa Nova and Remanso Counties. Fifteen individuals were sampled for each species  , except for Chamaecrista belemii, that had 30 sampled individuals . The assessed models were those proposed in the literature and constructed by the forward and backward methods, adjusted on the soil level diameter (SLD) and total height (H) for each plant. It was obtained equations for estimating the aerial biomass for individual trees of Byrsonima gardneriana, Cenostigma macrophyllum, Chamaecrista belemii, Copaifera coriacea, Maytenus rigida, Ruprechtia glauca, Strychno...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometric relations; Equations; Dry mass; Diametric class Engenharia florestal; Botânica; Ecologia Vegetal Relações alométricas; Equações; Classe diamétrica.
Ano: 2013
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/579

Growth and development of Conyza bonariensis based on days or thermal units
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Soares,Daniel Jorge; Oliveira,Wladecir Salles de; Uzuele,Elvio Lorençato; Carvalho,Saul Jorge Pinto de; Ovejero,Ramiro Fernando Lopez; Christoffoleti,Pedro Jacob.
Abstract: The objective of this work was to evaluate the growth and development of a glyphosate-resistant population of Conyza bonariensis in different sowing dates (autumn, winter, and spring) and in two agricultural environments, based on days or thermal units. Five experiments were performed in two agricultural environments in Brazil: two in the municipality of Não-Me-Toque, in the state of Rio Grande do Sul - with sowings in July and September 2011; and three in the municipality of Santa Cruz das Palmeiras, in the state of São Paulo ‒ with sowings in April, July, and September 2011. In each trial, ten evaluations of the phenological development and total dry mass of C.bonariensis were performed, fitting these variables to a unit of time in days or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hairy fleabane; Dry mass; Growing degree days; Modeling; Phenology; Weed biology.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000100045

Competitiveness of alexandergrass or Bengal dayflower with soybean
Provedor de dados: Planta Daninha
Autores: Dias,A.C.R.; Carvalho,S.J.P.; Marcolini,L.W.; Melo,M.S.C.; Christoffoleti,P.J.
Weeds compete with field crops mainly for water, light and nutrients, and the degree of competition is affected by the weed density and the intrinsic competitive ability of each plant species in coexistence. The objective of this research was to compare the competitiveness of alexandergrass (Brachiaria plantaginea) or Bengal dayflower (Commelina benghalensis) in coexistence with soybean, cv. M-Soy 8045. A factorial experiment (2 x 5) with two weed species and five competition proportions was carried out in a completely randomized design with four replicates. Proportions were based on a replacement series competition design, always maintaining the total density of four plants per 10 L plastic pots, which corresponded to 60 plants m ². The weed-crop...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Brachiaria plantaginea; Commelina benghalensis; Competition; Dry mass; Substitutive series.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000300008

Growth and mineral nutrition Of Ipomoea quamoclit
Provedor de dados: Planta Daninha
Autores: Carvalho,L.B.; Bianco,S.; Pitelli,R.A.
A greenhouse experiment was carried out from November 2006 to April 2007 at FCAV/UNESP, Brazil, aiming to study the dry mass production and the accumulation and distribution of macronutrients in Ipomoea quamoclit, an important weed for annual and perennial crops in Brazil. The plants were grown in seven liter pots with sand substrate, daily irrigated with Hoagland &amp;amp; Arnon nutrient solution. The experimental design was completely randomized with four replicates. The treatments corresponded to evaluation times at 14 day intervals, beginning 21 days after emergence (DAE). In each evaluation, the plants of four pots were analyzed in function of dry mass production and macronutrient content. I. quamoclit had a small dry mass and macronutrient...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Weeds; Morningglory; Dry mass; Macronutrients.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582009000200010

Growth and development of honey weed based on days or thermal units
Provedor de dados: Planta Daninha
Autores: Silva,A.P.P.; Marques,B.S.; Lima,R.S.O.; Machado,E.C.R.; Gonçalves,M.F.; Carvalho,S.J.P.
This work was carried out with the objective of evaluating the growth and development of honey weed (Leonurus sibiricus) based on days or thermal units (growing degree days). Thus, two independent trials were developed to quantify the phenological development and total dry mass accumulation in increasing or decreasing photoperiod conditions. Considering only one growing season, honey weed phenological development was perfectly fit to day scale or growing degree days, but with no equivalence between seasons, with the plants developing faster at increasing photoperiods, and flowering 100 days after seeding. Even day-time scale or thermal units were not able to estimate general honey weed phenology during the different seasons of the year. In any growing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leonurus sibiricus; Growing degree days; Phenology; Dry mass; Biology.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000100009

Padrões estruturais quantitativos de bancos de Sargassum (Phaeophyta, Fucales) do litoral dos estados do Rio de Janeiro e São Paulo, Brasil
Provedor de dados: Revista Brasileira de Botânica
Autores: SZÉCHY,MARIA TERESA M. DE; PAULA,ÉDISON J. DE.
Este trabalho objetivou descrever a estrututura biológica de bancos de Sargassum do litoral dos estados do Rio de Janeiro e São Paulo. Comunidades de 16 costões rochosos foram amostradas aleatoriamente (quadrados de 50 cm de lado) durante 1991-92. Essas comunidades, que apresentavam populações de Sargassum de sete diferentes táxons infragenéricos, eram submetidas a diferentes graus de exposição às ondas e à emersão. A massa seca de Sargassum variou de 37 g.m-2 a 587 g.m-2; os maiores valores foram encontrados em locais moderados e protegidos. A análise de agrupamento dessas comunidades, considerando a massa seca de 75 grupos de macroalgas e macroinvertebrados, indicou três padrões estruturais caracterizados pelo grupo de organismos mais abundantes: 1)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sargassum; Corallinaceae; Dry mass; Structural patterns.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000200002

Phosphorus behavior on an Oxisol fertilized by phosphate alkaline biosolid and cultivated with common bean
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Silva,Luiz C. da; Lucchesi,Luiz A. C.; Koehler,Henrique S.; Campos,Milton C. C.
This study aimed to evaluate the extractable phosphorus Mehlich-1 in a distrophic Red-Yellow Latosol (Oxisol) which received alkaline sewage sludge (alkaline biosolid) along with 0, 0.436, 0.872 and 1.745 dag kg-1 of P from three different sources and cultivated with common bean (Phaseolus vulgaris cv. IPR Uirapuru) in greenhouse. It also aimed to quantify the phosphorus uptake by the plant, plant production and the relative agronomic effectiveness index. For the establishment of the treatment the recommended dose was 45.85 kg ha-1 of P from the treatments, except the control (0 dag kg-1 of P). This dose was calculated for 2.5 kg of this Oxisol from Contenda, Paraná State, Brazil, contained in recepients of 3 dm3 with 6 cultivated bean plants (cv. IPR...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphorus; Dose; Grains; Dry mass; Phaseolus vulgaris.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662012001200001

Dry matter production and macronutrient leaf composition in lettuce under fertigation with nitrogen, potassium and silicon
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Souza,Renan S. de; Rezende,Roberto; Freitas,Paulo S. L. de; Gonçalves,Antonio C. A.; Rezende,Graziela S.
ABSTRACT The objective of this study was to evaluate, in greenhouse, the response of the lettuce cultivar 'Vera', with respect to the marketable shoot dry matter production and macronutrient accumulation, as a function of the application of different doses of nitrogen (N) and a potassium silicate-based leaf fertilizer. The lettuce was cultivated from August 10, 2012 (sowing) to October 16, 2012 (harvest). The experimental design was completely randomized with three replicates, referring to nine treatments, resulting from the combination between top-dressing doses of N (9, 54, 90, 126 and 171 kg ha-1) and Si/K2O (1.15, 6.90, 11.50, 16.10 and 21.85 kg ha-1), using the Plan Puebla III experimental matrix, and a control treatment without fertigation. Drip...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactuca sativa L.; Chemigation; Dry mass; Nutritional composition.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001201166

Size-mass relationships of Melanoides tuberculatus (Thiaridae: Gastropoda) in a eutrophic reservoir
Provedor de dados: Revista Brasileira de Zoologia
Autores: Silva,Eduardo Carvalho; Molozzi,Joseline; Callisto,Marcos.
This study evaluated the relationships of certain allometric measurements in Melanoides tuberculatus Muller, 1774, in order to develop a statistical model to estimate the biomass of this mollusc species. We measured the total length and aperture of 70 shells. These measurements were correlated with the biomass values to construct exponential and power-function models, and both models showed high coefficients of determination. The exponential model was the better biomass predictor, with a coefficient of determination over 93%. These proposed models may be an effective tool to determine the biomass of M. tuberculatus in eutrophic Brazilian reservoirs.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometry; Dry mass; Eutrophication; Molluscs.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000500004

Two years of nitrogen and sulfur fertilizations in a signal grass pasture under degradation: changes in the root system
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Silveira,Cristiane Prezotto; Oliveira,Daniela Alves de; Bonfim-Silva,Edna Maria; Monteiro,Francisco Antonio.
The objective of this research was to evaluate the effect of combinations of nitrogen and sulfur rates in degraded signal grass (Brachiaria decumbens) pasture on their productive, morphological and nutritional attributes in the root system at four soil depths. The pasture used in the experiment was established over eight years ago in Entisol. Five nitrogen rates (0; 150; 300; 450 and 600 kg/ha/year) and five sulfur rates (0; 15; 30; 45 and 60 kg/ha/year) were combined in a fractionated factorial in a randomized block design, with three replications. Nitrogen was supplied as ammonium nitrate and sulfur as gypsum, and the rates were split into three times in the rainy season. The evaluations occurred at intervals of 35 days during the rainy season and 56...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria decumbens; Dry mass; Length; Nitrogen concentration; Surface.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000600006

Complex bioclimatic and soil gradients shape leaf trait variation in Embothrium coccineum (Proteaceae) among austral forests in Patagonia
Provedor de dados: Revista Chilena de Historia Natural
Autores: SOUTO,CINTIA P; PREMOLI,ANDREA C; REICH,PETER B.
Patterns of trait variation may be adaptive when vary in relation to an environmental gradient. In particular, leaf traits can affect productivity and competitive ability. We identify patterns of leaf size and shape variation with environmental heterogeneity in one of the most widespread tree species within temperate South America: Embothrium coccineum (Proteaceae). We collected leaf specimens and composite soil samples from 35 populations between 38° and 55° S latitude in Patagonia, covering a wide range of mean annual precipitation (MAP) and mean annual temperature (MAT). At each location, we measured nine morphological traits, some of which were cross correlated hence we focus on a smaller number of representative traits. We hypothesized that leaf area...
Tipo: Journal article
Palavras-chave: Leaf shape; Complex gradients; Leaf area; Dry mass; SLA.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2009000200004

Plant growth and seed quality of bean seeds under soil waterlogging
Provedor de dados: Revista Scientia Agraria Paranaensis
Autores: Pedó, Tiago; Martinazzo, Emanuela Garbin; Aisenberg, Geison Rodrigo; Aumonde, Tiago Zanata; Villela, Francisco Amaral; Antunes, Irajá Ferreira.
The growth of plant species can be affected by waterlogging. This process occurs as result of physiological changes that occur at the plants. The study aimed to comparatively evaluate the growth and expression of seed vigor of common bean genotypes subjected to soil waterlogging. For each of the genotypes IPR Tuiuiú and Carioca, treatments consisted of combining soil waterlogging for 12 hours or kept at field capacity, and plant sample collection times. Plant samples were collected at every 20 day intervals, being determined dry mass, leaf area and seed vigor. The plants of genotype IPR Tuiuiú showed higher growth and similar expression of seed vigor under soil field capacity. In plants of genotype Carioca, soil waterlogging did not affect growth and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf area; Dry mass; Phaseolus vulgaris; Vigor.
Ano: 2017
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/13974

Competition of Amaranthus species with dry bean plants
Provedor de dados: Scientia Agricola
Autores: Carvalho,Saul Jorge Pinto de; Christoffoleti,Pedro Jacob.
Weeds compete with field crops mainly for water, light and nutrients, and this competition is among other factors, a function of the occurrence of weed density, and the intrinsic competitive ability of each vegetal species. The objective of this research was to evaluate the competitive ability of five weed species of the Amaranthus L. genus (A. deflexus, A. hybridus, A. retroflexus, A. spinosus and A. viridis) with dry bean plants (Phaseolus vulgaris L. - 'Carioca Precoce' cultivar), using the replacement series design. A fixed total density equivalent to 80 plants m-2 was used in pots of 2.8 L capacity varying the proportions between the species in coexistence. To install the experiment, Amaranthus seedlings were transplanted to the pots at the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris L.; Pigweed; Competitiveness; Dry mass.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000300003

Spatial variation of periphyton structural attributes on Eichhornia crassipes (Mart.) Solms. in a tropical lotic ecosystem - doi: 10.4025/actascibiolsci.v35i3.17879
Provedor de dados: Acta Scientiarum: Biological Sciences
Autores: Pereira, Thaís Almeida; Universidade Federal do Espirito Santo; Felisberto, Sirlene Aparecida; Universidade Federal de Goiás; Fernandes, Valéria Oliveira; Universidade Federal do Espírito Santo.
This study evaluated the influence of physical, chemical and physico-chemical variables of water on the biomass of periphyton community and verified the differences between six sampling sites over the course of São Mateus river: two upstream of the city of São Mateus, Espírito Santo State (E1, E2), two along (E3, E4), and two downstream of the city (E5, E6). The periphyton was collected from roots of Eichhornia crassipes (Mart.) Solms. Samplings were undertaken every week in September and October 2010. The periphyton biomass was estimated through chlorophyll ‘a’, biovolume, dry mass, ash-free dry mass, and ash. Higher values of chlorophyll ‘a’ were found at E1, while the total biovolume featured greater values in E4 and E3. Regarding the values of...
Tipo: Estudo de biomassa
Palavras-chave: Perifiton  biomassa  ecossistema lótico chlorophyll ‘a; Dry mass; Biovolume Ecologia.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/17879

Basil plants growth and essential oil yield in a production system with successive cuts
Provedor de dados: Bragantia
Autores: May,André; Bovi,Odair Alves; Maia,Nilson Borlina; Barata,Lauro Euclides Soares; Souza,Rita de Cassia Zacardi de; Souza,Eduardo Mattoso Ramos de; Moraes,Andrea Rocha Almeida de; Pinheiro,Mariane Quaglia.
This work studied the growth of basil plants and the effect of successive cuts on the total yield and quality of the essential oil, throughout the crop cycle. Steady increases were observed in the dry weight of the aerial part and in the essential oil yield, during the cultivation cycle. Intensive cultivation and successive cuts could improve the agronomical and industrial yield in each harvest.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ocimum basilicum L.; Dry mass; Harvest intervals.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052008000200014

Effects of early and late season defoliation on photosynthesis, growth and yield of mustard (Brassica juncea L.)
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Khan,N.A.; Lone,P.M.
Mustard (Brassica juncea L.) is characterized by a large number of leaves in the lower layers. These leaves are poorly illuminated, remain below the light compensation point and abscise at maturity. The effects of removing 50 % of all leaves taken from the lower half of the plant at 40 (pre-flowering) or 60 (post-flowering) days after sowing (DAS) were studied on photosynthesis and growth at 80 DAS and on yield at harvest. A comparison of stomatal and mesophyll effects on photosynthesis upon removal of such leaves was also made. Defoliation at 40 DAS resulted in a higher rate of photosynthesis (P N), growth and yield compared to defoliation at 60 DAS or the no defoliation control. The non-significant variation in stomatal limitation (I S), increased...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbonic anhydrase; Dry mass; Stomatal limitation.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000100015