Maize transpiration in response to meteorological conditions

Klimešová, Jana; Středová, Hana; Středa, Tomáš

doi:10.2478/congeo-2013-0014

Cited by 8 publications

(8 citation statements)

References 26 publications

(26 reference statements)

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“…The dependence of maize transpiration on air temperature, air humidity, solar radiation, soil moisture, wind speed, and leaf temperature were quantified [10]. Significant relationships between transpiration, global radiation, and air temperature were found.…”

Section: Main Abiotic Plant Stresses In Central Europementioning

confidence: 99%

Plant Integrity – The Important Factor of Adaptability to Stress Conditions

Bláha¹,

Středa²

2016

Abiotic and Biotic Stress in Plants - Recent Advances and Future Perspectives

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Crop production, research of crop productivity, tolerance to abiotic and biotic stresses, plant disease, and pests all represent the problem of plant integrity. Plants represent an integrated system of units, which are responsible for its resistance to adverse environmental conditions on the basis of the evaluation of characteristics both aboveground and in the roots. This "complete unit" root and shoot has an influence on the formation of seeds, the quality of which may affect subsequent growth, development, and stress tolerance of the filial generation. Properties of the roots predominantly influence especially at drought stress conditions growth, development, and the metabolic processes in the aboveground part of the plant. The seed traits affect the filial generation root morphology at the beginning of the vegetation period especially length, surface, depth of root penetration, and also root weight . In the biology of the seeds, roots, yield formation, stress tolerance, etc., attention needs to be paid to plant integrity and adaptability during variable environmental conditions. Every plant, and its traits, is a result of all the plant's activities. This is important for plant breeding. For example, it is possible to provide selection for cultivar traits at seed germination. Quality of the embryonic traits is important for subsequent growth and development. In the juvenile phase, and in later stages, the same genotype is still active. This is is among the main reasons for studying plant integrity.

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Section: Main Abiotic Plant Stresses In Central Europementioning

confidence: 99%

Plant Integrity – The Important Factor of Adaptability to Stress Conditions

Bláha¹,

Středa²

2016

Abiotic and Biotic Stress in Plants - Recent Advances and Future Perspectives

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“…Common methods for making measurements of transpiration (T) and soil evaporation (E), such as sap flow sensors [3][4][5] and lysimeters [6,7], are limited to individual plants or small footprints, which can lead to difficulties in upscaling in heterogeneous environments [8]. Methods that make an integrated measurement with a much larger footprint at the field scale such as eddy covariance, Bowen ratio, or scintillometry are only able to measure the total ET and provide implicit information on E and T. These methods are also generally unsuitable for use inside plant canopies as they need to be a minimum height above the surface [9] and require minimum levels of turbulence intensity, which is strongly reduced within a closed canopy.…”

Section: Introductionmentioning

confidence: 99%

High-Frequency Stable-Isotope Measurements of Evapotranspiration Partitioning in a Maize Field

Hogan

Parajka

Oismüller

et al. 2020

Water

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Knowledge of the evaporation (E) and transpiration (T) components of evapotranspiration (ET) is important for ecohydrological modeling and agricultural productivity. The stable-isotope method offers the possibility to partition E and T due to the distinct differences in the isotopic signals of the sources. In this study, the concentration and isotopic ratios for oxygen-18 (18O) of water vapor in the ecosystem boundary layer of a growing maize field at the Hydrological Open Air Laboratory (HOAL) catchment in Austria were measured using a high-frequency field-sampling device. In conjunction with isotope samples from the soil and maize plants, these data were used to partition ET using the Keeling plot technique. Eddy covariance and sap flow measurements were used to provide a comparison to test the stable-isotope method. The fraction of transpiration (Ft) calculated with the stable-isotope method showed good agreement with the sap flow method. Overall daily average values of Ft were in a range from 43.0 to 88.5% with T accounting for an average value of 67.5% of the evapotranspiration over the nine days of the experimental period. Following a precipitation event of 9.7 mm, Ft increased from 63.4 to 88.5% over the next four days as the upper layer of the soil dried out while the plants accessed deeper soil water.

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“…The microclimate of vegetation is characterized by the appearance of diffuse solar radiation, minor fluctuations in air temperature and humidity, reduced airflow (wind, convection and turbulence), higher humidity and lower long-wave radiation during the night (Krédl et al, 2012). Canopy with high leaf area index (LAI) can reduce over 95% of solar radiation and this should keep the air and soil beneath the canopy cool during the day (Bonan, 2008;Klimešová et al, 2013). Despite many sophisticated works aimed at simulation of physiological processes in stands, a full understanding of the relationship between vegetation and microclimate is currently lacking.…”

Section: Introductionmentioning

confidence: 99%

The course, stratification and possibility of simulating relative air humidity in winter wheat stand

Krčmářová¹,

Pokorný²,

Středa³

2016

Contributions to Geophysics and Geodesy

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The aim of this study was: (i) long-term (2010, 2011 and 2013) evaluation of the relative air humidity in the winter wheat canopy, (ii) finding of relationships between relative air humidity in canopy and computed or measured meteorological values (precipitation totals, evapotranspiration, moisture balance, specific air humidity, volume soil moisture, % of available soil water content, value of soil water potential), (iii) testing of simulation of daily relative air humidity, based on selected meteorological values and potential evapotranspiration (FAO Penman-Monteith method) and actual evapotranspiration, (iv) testing of simulation of relative air humidity hourly values in the wheat canopy, (v) evaluation of dependence between relative air humidity and leaf wetness. The measurement was performed at the experimental field station of Mendel University in Žabčice (South Moravia, the Czech Republic). Data recording for wheat canopy was conducted by means of a meteostation equipped with digital air humidity and air temperature sensors positioned in the ground, effective height of the stand and in 2 m above the ground. The main vegetation period of wheat was divided into three stages to evaluate differences in various growing phases of wheat. The data from nearby standard climatological stations and from agrometeorological station in Žabčice were used for establishment of relationships between relative air humidity in winter wheat canopy and surrounding environment by correlation and regression analysis. Relative air humidity above 90% occurred substantially longer on the ground and at the effective height of the stand in comparison with the height of 2 m. By means of regression analysis we determined that the limit of 90% was reached in the canopy when at the climatological station it was just 60 to 90% for ground level and 70 to 90% for effective height, especially during the night. Slight dependence between measured or computed meteorological variables and relative air humidity in winter wheat canopy was found (r= 0.23 − 0.56 for precipitation totals,r= 0.27 − 0.57 for % of available soil water capacity, etc.). The simulation of hourly values of relative air humidity in wheat canopy is partially possible just when using the data of relative air humidity from the relevant standard climatological station.

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Maize transpiration in response to meteorological conditions

Cited by 8 publications

References 26 publications

Plant Integrity – The Important Factor of Adaptability to Stress Conditions

Plant Integrity – The Important Factor of Adaptability to Stress Conditions

High-Frequency Stable-Isotope Measurements of Evapotranspiration Partitioning in a Maize Field

The course, stratification and possibility of simulating relative air humidity in winter wheat stand

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