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| Registros recuperados: 73 | |
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| RODRÍGUEZ,ROLANDO; HOFMANN,GLENN; ESPINOSA,MIGUEL; RÍOS,DARCY. |
| The effects of silvicultural regimes on leaf area and biomass distribution were analyzed in 16-year old Pinus radiata trees growing in the semiarid zone of Chile. Three stands with different silvopastoral management were compared with a conventionally managed stand. Data were obtained through destructive sampling of 36 trees and analyzed by MANOVA and regression models of ANCOVA. Results show that the management regime affects the leaf area. Specific leaf area was affected by both silvicultural regime and crown position. Total biomass per tree under the silvopastoral regime was 2.1 to 2.5 times larger than in the conventional forestry regime. However, aboveground biomass partitioning was neither affected by the silvicultural regime nor by the schemes of... |
| Tipo: Journal article |
Palavras-chave: Leaf area; Biomass; Silvopastoral management. |
| Ano: 2003 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000300008 |
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| 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 |
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| Leite, Tiago de Sousa; Freitas, Rômulo Magno Oliveira de; Dombroski, Jeferson Luiz Dallabona; Leite, Moadir de Sousa; Rodrigues, Mara Raquel de Oliveira. |
| O objetivo desse estudo foi avaliar o crescimento inicial e partição da biomassa de mudas de mulungu (Erythrina velutina Willd.) submetidas a diferentes doses de fósforo na presença e ausência de fungos micorrízicos arbusculares (FMA’s). Foi utilizado o delineamento experimental em blocos ao acaso, num esquema fatorial 5 x 2, com quatro blocos e três plantas por unidade experimental. Os tratamentos foram compostos pela combinação de cinco doses de fósforo (0, 50, 100, 150 e 200 mg de P.kg de solo-1), utilizando-se como fonte o adubo superfosfato simples, e presença ou ausência de FMA’s. Aos 98 dias após a semeadura (DAS) foram avaliadas as variáveis: altura da parte aérea, diâmetro do colo, número de folhas, índice de conteúdo de clorofila foliar, matéria... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Recursos Florestais; Nutrição Mineral Matéria seca; Área foliar; Índice de qualidade de Dickson Dry matter; Leaf area; Dickson quality index. |
| Ano: 2014 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/642 |
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| Scavroni,Joseane; Ferreira,Leonardo Cesar; Valmorbida,Janice; Boaro,Carmen Sílvia Fernandes. |
| Development of Mentha piperita L . on biosolids amended soil with levels equivalent to 0, 28, 56 and 112 t ha-1 was evaluated. In order to measure the productivity and its relation with mint essential oil yield, different indices were determined: leaf area, total and several organ dry matter, leaf area ratio, specific leaf area, net assimilation rate and relative growth rate at 30, 44, 58, 72 and 86 days after planting (DAP), and essential oil yield at 90, 110 and 120 DAP. Physiological indices revealed that biosolids prolonged the vegetative phase of the plants, which adapted themselves to the presence of biosolids with time. Plants showed inverse behaviors in relation to productivity, resulting from the primary metabolism, represented by the shoot dry... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Growth analysis; Peppermint; Essential oil; Sewage-sludge; Leaf area; Dry matter. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000200014 |
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| Capuzzo,Juliana Pfrimer; Rossatto,Davi Rodrigo; Franco,Augusto César. |
| The genus Tabebuia is representative of the Cerrado biome, occurring in savanna and forest formations. These vegetation types are associated with distinct environmental conditions in terms of water availability, microclimate and soil properties. We compared morphological and physiological traits between Tabebuia aurea (Silva Manso) Benth. & Hook. f. ex S. Moore, which is typical of the savanna vegetation, and T. impetiginosa (Mart. ex DC.) Standl, which is commonly found in the gallery forests that occur along streams and rivers. Both were sampled in savanna conditions under full sun. The savanna species had higher values of leaf and petiole thickness, specific leaf mass, maximum CO2 assimilation on a leaf area basis, stomatal conductance,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cerrado; CO2 assimilation; Leaf area; Photosynthetic pigments; Tabebuia. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062012000300002 |
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| Mendoza Pedroza, Sergio Ibán. |
| En México, la alfalfa es la leguminosa más utilizada en la alimentación del ganado lechero, debido a su alta cantidad y calidad de forraje obtenido por superficie. El objetivo del presente estudio fue determinar el efecto de la frecuencia de corte en la dinámica de crecimiento, rendimiento y calidad de la alfalfa. El estudio se realizó de agosto de 2006 a agosto de 2007 en el Colegio de Postgraduados con alfalfa Variedad “San Miguelito”. Los tratamientos fueron cuatro frecuencias (3, 4, 5 y 6 semanas para primavera-verano y 4, 5, 6 y 7 semanas para otoño-invierno) distribuidos aleatoriamente en un Diseño Experimental Completamente al Azar, con 4 repeticiones. En rendimiento acumulado existieron diferencias significativas (P<0.05), mostrando el menor... |
| Tipo: Tesis |
Palavras-chave: Medicago sativa; Frecuencia de corte; Rendimiento; Calidad; Área foliar; Maestría; Ganadería; Cutting frequency; Yield; Quality; Leaf area. |
| Ano: 2008 |
URL: http://hdl.handle.net/10521/1581 |
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| Strassburger, André Samuel; Universidade Federal de Pelotas; Peil, Roberta Marins Nogueira; Universidade Federal de Pelotas; Fonseca, Leandro Andrade da; Universidade Federal de Pelotas; Aumonde, Tiago Zanatta; Universidade Federal de Pelotas; Mauch, Carlos Rogério; Universidade Federal de Pelotas. |
| O objetivo deste trabalho foi quantificar os índices de crescimento, a produção e a distribuição de matéria seca da cultura da abobrinha italiana cultivada em substrato de casca de arroz in natura com solução nutritiva recirculante, em duas épocas de cultivo: primavera-verão de 2005 e verão-outono de 2006, caracterizadas, respectivamente, como períodos de alta e baixa disponibilidades de radiação solar. Cada tratamento correspondeu a uma época de amostragem, sendo a produção de matéria seca quantificada aos 0, 18, 32, 46 e 68 dias após o transplante (DAT) no cultivo de primavera-verão, e aos 0, 15, 29, 43 e 55 DAT no cultivo de verão-outono. A produção de matéria seca foi maior quando a disponibilidade de radiação solar foi mais elevada. Nessa situação... |
| Tipo: Pesquisa de Campo |
Palavras-chave: 5.00.00.00-4; 5.01.00.00-9 Cucurbita pepo L.; Produção de matéria seca; Hidroponia; Área foliar; Radiação solar; Análise de crescimento 5.01.03.00-8 Cucurbita pepo L.; Dry matter production; Hydroponics; Leaf area; Solar radiation; Growth analysis. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5952 |
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| Cárdenas,Julián; Carranza,Carlos; Miranda,Diego; Magnitskiy,Stanislav. |
| Passiflora seeds germinate erratically presenting difficulties for their handling in a greenhouse. The effect of removing of basal point of seeds (RB) and pre-imbibition of seeds of sweet granadilla and yellow passion fruit in 50, 100, 200, and 400 mg mL-1 solutions of gibberellic acid (GA3) or 0.1% KNO3 solution was studied. The experiment was conducted in greenhouses in La Plata, Colombia. Two accessions PrJ1 and PrJ2 of sweet granadilla were evaluated. There were calculated the final percentage of germination (PG), mean germination time (MGT), and the mean germination rate (MGR). The leaf area and dry mass of seedlings were measured 22 days after sowing (das); with this data, specific leaf area and relation root/shoot were calculated. In all cases, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pre-imbibition; Final percentage of germination; Mean germination time; Mean germination rate; Leaf area. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452013000300023 |
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| KHAN,I.A.; HASSAN,G.; MALIK,N.; KHAN,R.; KHAN,H.; KHAN,S.A.. |
| ABSTRACT Maize crop (Zea mays) is facing lots of problems from different pests throughout Asia, including Pakistan. Weed infestation is one of the serious pests that remarkably decrease the grain yield in maize. In Khyber Pakhtunkhwa province of Pakistan, the trend of maize hybrid cultivation is gaining the attention of the farmers due to its higher production. Therefore, in this research we tested herbicides (Stomp 330 E, Dual gold 960 EC, 2,4-D, ester) in maize hybrids (P-3025, P-32T78, P-3203). The experiment was done in RCB design with split plots arrangement, where maize hybrids were kept in main plots, while herbicides were assigned to the subplots. Each treatment was repeated three times at the New Developmental Farm (NDF), at the Peshawar... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbicides; Leaf area; Maize hybrids; Weeds. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400729 |
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| Registros recuperados: 73 | |
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