Stomatal and photosynthetic responses of olive (<i>Olea europaea</i> L.) leaves to water deficits

Moriana, A.; Villalobos, Francisco J.; Fereres, E.

doi:10.1046/j.0016-8025.2001.00822.x

Cited by 226 publications

(163 citation statements)

References 29 publications

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“…This behaviour of reduced F GPP without water stress is in accordance with the 8 measurements of conductance and photosynthesis made at leaf level by Gimenez et al 9 (1996) and Moriana et al (2002); a similar pattern of canopy conductance for water 10 vapour under irrigated conditions was found, -this time at stand level -by Villalobos 11 et al . Therefore, in this species, the use of irradiance for the 12 assessment of assimilation should rely on a solid way to assess canopy conductance, 13 even in well watered conditions.…”

Section: Net Ecosystem Exchange and Gross Primary Production Ratessupporting

confidence: 75%

See 1 more Smart Citation

Carbon exchange and water use efficiency of a growing, irrigated olive orchard

Testi

Orgaz

Villalobos

2008

Environmental and Experimental Botany

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Section: Net Ecosystem Exchange and Gross Primary Production Ratessupporting

confidence: 75%

“…6 and Fig. 7) may be associated to higher 17 conductances already found in this season in olive (Moriana et al, 2002), probably 18 caused by endogenous factors . 19…”

Section: Net Ecosystem Exchange and Gross Primary Production Ratesmentioning

confidence: 99%

Carbon exchange and water use efficiency of a growing, irrigated olive orchard

Testi

Orgaz

Villalobos

2008

Environmental and Experimental Botany

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“…Nitrogen application increased assimilation rate, stomatal conductance of water vapour by an average and water use efficiency over the 2 years of the study when compared to the control. Moriana, Villalobos and Fereres (2002) reported a relationship between stomatal conductance and water in the olive.…”

Section: Resultsmentioning

confidence: 99%

Water use efficiency of marandu palisadegrass as affected by nitrogen and sulphur rates

Artur¹,

Garcez²,

Monteiro³

2014

Rev. Ciênc. Agron.

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-This study aimed to evaluate the effects of combination of nitrogen and sulphur fertilizations on water consumption and water use efficiency by marandu palisadegrass (Brachiaria brizantha cv. Marandu). The experiment was carried out in a greenhouse, using a Typic Quartzipsamment. Five nitrogen rates (0; 100; 200; 300 and 400 mg dm -3 ) were combined with five sulphur rates (0; 10; 20; 30 and 40 mg dm -3 ) in a fractionated 5 2 factorial, with four replications. The leaf area was harvested three times at intervals of approximately 30 days. Soil moisture was maintained at 70% of capacity retention through a self-irrigating system. There was an increase in consumption and water use efficiency by the forage grass due to the supply of nitrogen and sulphur. Nitrogen fertilization increased the consumption and efficiency of water use in the first growth period (35 days after the transplanting of seedlings). Nitrogen and sulphur supply were more effective in increasing water consumption in the third growth period. For water use efficiency this fact was observed in the second and third growth periods of the Marandu palisadegrass.Key words: Marandu palisadegrass. Plants and water. Plants-nitrogen effect. Plants-sulphur effects.RESUMO -Neste estudo objetivou-se avaliar a combinação de doses de nitrogênio e enxofre no consumo e eficiência do uso da água pela Brachiaria brizantha cv. Marandu. O experimento foi conduzido em casa de vegetação, utilizando-se um solo classificado como Neossolo Quartzarênico Órtico típico. Cinco doses de nitrogênio (0; 100; 200; 300 e 400 mg dm ) e m um f a tori al 5 2 fracionado, com quatro repetições. A parte aérea do capim foi cortada três vezes em intervalos aproximados de 30 dias. A água do solo foi mantida a 70% da capacidade de retenção por meio de um sistema autoirrigante. Ocorreu aumento no consumo e na eficiência do uso da água pela gramínea forrageira em razão do fornecimento de nitrogênio e enxofre. A adubação com nitrogênio incrementou o consumo e a eficiência no uso da água no primeiro período de crescimento (35 dias após o transplantio das mudas). O fornecimento simultâneo de doses de nitrogênio e enxofre foi mais efetivo no aumento do consumo de água no terceiro período de crescimento. Para a eficiência no uso da água esse efeito foi observado no segundo e terceiro períodos de crescimento do capim-marandu.Palavras-chave: Capim-marandu. Plantas e água. Plantas-efeito do nitrogênio. Plantas-efeito do enxofre.

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“…However, the success of the second approach depends critically on the choice of the model comparison metric. Often the comparison metric is purely a quantitative measure of the goodness of fit, such as the coefficient of determination, R 2 , calculated through linear regression between model output and observed data [e.g., Katul et al, 2000;van Wijk et al, 2000;Moriana et al, 2002;Misson et al, 2004]. However, like the transpiration models used here, semiempirical models are often nonlinear, and all of the models included in a comparison may not use the same predictor variables, therefore, the most appropriate way to calculate R 2 uniformly for all the models is not always clear [Healy, 1984;Kvålseth, 1985;Anderson-Sprecher, 1994;Mitchell, 1997].…”

Section: Overview Of Model Comparison and Selection Approaches: Ratiomentioning

confidence: 99%

Quantitative comparison of canopy conductance models using a Bayesian approach

Samanta

Clayton

Mackay

et al. 2008

Water Resources Research

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[1] A quantitative model comparison methodology based on deviance information criterion, a Bayesian measure of the trade-off between model complexity and goodness of fit, is developed and demonstrated by comparing semiempirical transpiration models. This methodology accounts for parameter and prediction uncertainties associated with such models and facilitates objective selection of the simplest model, out of available alternatives, which does not significantly compromise the ability to accurately model observations. We use this methodology to compare various Jarvis canopy conductance model configurations, embedded within a larger transpiration model, against canopy transpiration measured by sap flux. The results indicate that descriptions of the dependence of stomatal conductance on vapor pressure deficit, photosynthetic radiation, and temperature, as well as the gradual variation in canopy conductance through the season are essential in the transpiration model. Use of soil moisture was moderately significant, but only when used with a hyperbolic vapor pressure deficit relationship. Subtle differences in model quality could be clearly associated with small structural changes through the use of this methodology. The results also indicate that increments in model complexity are not always accompanied by improvements in model quality and that such improvements are conditional on model structure. Possible application of this methodology to compare complex semiempirical models of natural systems in general is also discussed.

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Stomatal and photosynthetic responses of olive (Olea europaea L.) leaves to water deficits

Cited by 226 publications

References 29 publications

Carbon exchange and water use efficiency of a growing, irrigated olive orchard

Carbon exchange and water use efficiency of a growing, irrigated olive orchard

Water use efficiency of marandu palisadegrass as affected by nitrogen and sulphur rates

Quantitative comparison of canopy conductance models using a Bayesian approach

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