Effect of soil water availability on gas exchange in young trees of Eucalyptus grandis W. Hill ex Maiden

Tafur, María Sara Mejía de; Herrera, Néstor Miguel Riaño; Mesa, John Byron Urrego; Espinosa, Dora Mònica Ibarra; Duque, Claudia Marcela Zapata

doi:10.15446/acag.v66n4.58194

Cited by 4 publications

(4 citation statements)

References 17 publications

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“…There was no significant difference between accessions for water use efficiency (WUE) ( Figure 6). Mejia-de Tafur et al (2017), in their work with eucalyptus, demonstrate that there was no difference in water use efficiency between treatments involving rates of water reduction. The authors found a significance only in the treatment which included soaking.…”

Section: Resultsmentioning

confidence: 97%

“…Para a característica eficiência do uso da água (EUA), não houve diferença significativa entre os acessos (Figura 6). Mejia-de Tafur et al (2017), em seus estudos com eucalipto, demonstram que não houve diferença na eficiência do uso da água entre os tratamentos quando envolvidas as taxas de redução hídrica. Os autores constataram uma significância somente para o tratamento com encharcamento.…”

Section: Resultsunclassified

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Photosynthetic characteristics in fig tree accessions for diversification of production

Ferreira

Rodrigues²,

Lisboa³

et al. 2019

AGRO@MBIENTE ON-LINE

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Photosynthesis allows plants, through metabolic reactions, to obtain products for their growth and development. Knowledge of and estimating the physiological variables involved in the photosynthetic process can be an advantage in choosing accessions for setting up an orchard. The aim of this study therefore was to evaluate some of the physiological characteristics involved in the photosynthetic process of six commercial accessions of the fig tree. The experiment was conducted in a completely randomised design, comprising six treatments and six replications, giving a total of 36 experimental units. The treatments consisted of the following fig accessions: ‘Roxo de Valinhos’, ‘Palestino’, ‘Figo Vermelho’, ‘PI 189’, ‘Cuello Negro’ and ‘Turco’. The net rate of CO2 assimilation, stomatal conductance, transpiration rate and internal leaf temperature varied statistically between accessions. Some accessions demonstrated the same performance as ‘Roxo de Valinhos’ for the photosynthetic variables. As such, the dependence of the domestic market on one single cultivar should be reviewed; however, further studies on other physiological and production characteristics should be carried out in order to validate each recommendation.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsunclassified

Photosynthetic characteristics in fig tree accessions for diversification of production

Ferreira

Rodrigues²,

Lisboa³

et al. 2019

AGRO@MBIENTE ON-LINE

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“…Ahora bien, no todas las plantas responden igual a los cambios en las variables meteorológicas, algunas se afectan considerablemente, pero otras como la yuca (Manihot estulenta Crantz), responden de manera diferencial a la humedad relativa del aire según la disponibilidad de agua en el suelo, a la temperatura y a la intensidad de luz, afectando la tasa de fotosíntesis sin alterar de manera significativa el rendimiento final del cultivo, sin embargo, se presentan diferencias entre variedades de la misma especie. Esto también se ha encontrado en plantas jóvenes de eucalipto (Eucalyptus grandis W. Hill ex Maiden), las cuales responden a condiciones de temperatura, disponibilidad de agua en el suelo según las condiciones ambientales y el genotipo (De Tafur et al, 2017;El-Sharkawy, 2007, 2009.…”

Section: Variablesunclassified

¿Influyen las casas de malla en la evapotranspiración de referencia (ETo)?

Lasprilla V.,

Mejía de Tafur,

Torres Prieto

2023

Acta Agron.

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Las casas de malla son una alternativa que permite al agricultor proteger su cultivo de plagas y enfermedades, y permite reducir la aplicación de agroquímicos. Estas casas de malla generalmente se construyen con malla antitrip (pantalla porosa), la cual impide el paso de insectos protegiendo así el cultivo. Como es de esperar, la malla genera un microclima al interior, lo cual podría conllevar un cambio en las necesidades hídricas del cultivo, pero no se tienen estudios en Colombia que cuantifiquen los cambios producidos al interior de estas casas de malla en las variables meteorológicas. Este estudio empleó dos estaciones meteorológicas y dos cenirrómetros sobre superficie de referencia, ubicando un cenirrómetro y una estación al interior de la casa de malla y los otros dos en el exterior, con el objetivo de observar la influencia de la casa de malla en la evapotranspiración de los cenirrómetros y la evapotranspiración de referencia o ETo. Los resultados mostraron que al interior de la casa de malla se redujo la velocidad de viento, la humedad relativa y la radiación solar, y se incrementó la temperatura. Estos cambios generaron la reducción de ETo en un 20 % y la evaporación del cenirrómetro en un 27 %, por lo que se concluye que las casas de malla son una opción para reducir el consumo de agua del cultivo.

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“…Net photosynthetic rate, transpiration rate, stomatal conductance, internal carbon dioxide concentration, and photosynthetic water use efficiency were determined using the IRGA, LCA-4, Analytical Development Company, Hoddesdon, England [24][25][26].…”

Section: Physiological Parameters Used In the Studymentioning

confidence: 99%

Detrimental Effects of Induced Soil Compaction on Morphological Adaptation and Physiological Plasticity of Selected Multipurpose Tree Species

Asif

Nawaz

Ahmad

et al. 2023

Plants

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Soil compaction has become a global problem affecting soil worldwide. With an increased population, more demands for food and wood have resulted in intensive cultivation and increased mechanization of our farmlands and irrigated plantations. The use of heavy machinery results in soil compaction, which affects the entire soil ecosystem. This study was conducted to analyze the impact of compacted soil on germination and initial growth stages of four major agro-forest trees of central Punjab, Pakistan. Morpho-physiological traits of all selected species (Eucalyptus camaldulensis, Albizia lebbeck, Vachellia nilotica, and Zyziphus mauritiana) were measured against soil compaction. Results indicated that the root and shoot length, biomass, root–shoot ratio, diameter at root collar, no. of leaves and branches, leaf area, germination, and survival %, and physiological traits (i.e., photosynthetic rate, transpiration rate, stomatal conductance, internal CO2 concentration, and photosynthetic water use efficiency) were significantly affected by the induced soil compaction. Eucalyptus camaldulensis Dehnh. performed better and exhibited 96% germination percentage under (1.40 mg m−3) compaction level and gradually decreased by 11% with the increase of compaction level (1.80 mg m−3). It shows that the shorter roots developed due to soil compaction decreased water use efficiency, photosynthesis, and whole-plant physiological performance. The findings concluded that judicious use of machinery is highly desired for sustainable and good-quality wood production from farm trees.

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Effect of soil water availability on gas exchange in young trees of Eucalyptus grandis W. Hill ex Maiden

Cited by 4 publications

References 17 publications

Photosynthetic characteristics in fig tree accessions for diversification of production

Photosynthetic characteristics in fig tree accessions for diversification of production

¿Influyen las casas de malla en la evapotranspiración de referencia (ETo)?

Detrimental Effects of Induced Soil Compaction on Morphological Adaptation and Physiological Plasticity of Selected Multipurpose Tree Species

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