EVAPOTRANSPIRATION PARTITION FOR A MAIZE CROP
Keywords:Evapotranspiration. Partition. Transpiration. AGRO-IBIS.
Crop transpiration is directly related to its production. Plant transpiration varies along the crop cycle and in most part of this cycle is the dominant component in evapotranspiration. There are several well-established techniques to estimate these components individually. Currently, the eddy covariance technique is widely used for measurements of evapotranspiration. However, this technique is unable to identify the flow of water between the surface and the atmosphere has its origin by evaporation from soil or plant transpiration. A new methodology based on the efficiency of water use by the plant is being used successfully. This technique determines how much water is transpired to each carbon molecule attached to the plant. This efficiency ratio is obtained by the difference of external and internal concentration on stomatal cavity of CO2 and H2O. In practice, external concentration of carbon and water is obtained from the infra-red gas analyzers used to obtain data in eddy covariance technique. In this work, the evapotranspiration for a maize crop in southern Brazil is partitioned and compared to the surface model AGRO-IBIS. Results show that the maximum development of the plant transpiration is approximately 70% of evapotranspiration.
Abramopoulos F., C. Rosenzweig, E
B. Choudhury., (1988).Improved Ground
Hydrology Calculations For Global Climate
Models (Gcms): Soil Water Movement And
Evapotranspiration. J. Climate, v.1, p.921–941.
Koold. Et Al., (2014). A Review Of
Approaches For Evapotranspiration
Partitioning. Agriculture and Forest
Meteorology. v.184, p.56–70.
Lasslop, G. Et Al.,(2010). Separation Of
Net Ecosystem Exchange Into Assimilation
And Respiration Using A Light Response Curve Approach: Critical Issues And Global Evaluation. Global Change Biology. v.16, p.187-208.
Meinzer, F. C., Hinckley, T. M. E
Ceulemans, R., (1997). Apparent Responses
Of Stomata To Transpiration And Humidity In A Hybrid Poplar Canopy. Plant, Cell &
Ruedell, J., (1995). Plantio Direto Na
Região De Cruz Alta. Cruz Alta: Fundacep
Scanlon, T.M., E W.P. Kustas. (2010).
Partitioning Carbon Dioxide And Water Vapor
Fluxes Using Correlation Analysis. Agriculture
And Forest Meteorology. v.150, p.89–99.
Reichstein, M. Et Al., (2005). On The
Separation Of Net Ecosystem Exchange Into
Assimilation And Ecosystem Respiration: Review And Improved Algorithm, Global Change Biology, v. 11, p. 1424–1439.
Thompson, A.L., Martin, D.L.,
Norman, J.M., Tolk, J.A., Gilley, J.R.,
Schneider, A.D., (1997). Testing Of A
Water Loss Distribution Model For Moving
Sprinkler Systems. Trans. Asae V. 40, p.81–
Zegada-Lizarazu, W. E Berliner, P.
R., (2011). Inter-Row Mulch Increase The Water Use Efficiency Of Furrow-Irrigated Maize In An Arid Environment. Journal Of Agronomy and Cropscience,197: 237248.Doi: 10.1111/J.1439037X.2010.0045x
Zeiger, E. E Taiz, L., (2009). Fisiologia
Vegetal, Porto Alegre: Armed , 4. Ed., p.848.
Zeggaf, Adel T. Et Al.,(2008). A Bowen
Ratio Technique For Partitioning Energy Fluxes Between Maize Transpiration And Soil Surface Evaporation. Agronomy Journal. V.100, p. 988- 996.
How to Cite
To access the DECLARATION AND TRANSFER OF COPYRIGHT AUTHOR’S DECLARATION AND COPYRIGHT LICENSE click here.
Ethical Guidelines for Journal Publication
The Ciência e Natura journal is committed to ensuring ethics in publication and quality of articles.
Conformance to standards of ethical behavior is therefore expected of all parties involved: Authors, Editors, Reviewers, and the Publisher.
Authors: Authors should present an objective discussion of the significance of research work as well as sufficient detail and references to permit others to replicate the experiments. Fraudulent or knowingly inaccurate statements constitute unethical behavior and are unacceptable. Review Articles should also be objective, comprehensive, and accurate accounts of the state of the art. The Authors should ensure that their work is entirely original works, and if the work and/or words of others have been used, this has been appropriately acknowledged. Plagiarism in all its forms constitutes unethical publishing behavior and is unacceptable. Submitting the same manuscript to more than one journal concurrently constitutes unethical publishing behavior and is unacceptable. Authors should not submit articles describing essentially the same research to more than one journal. The corresponding Author should ensure that there is a full consensus of all Co-authors in approving the final version of the paper and its submission for publication.
Editors: Editors should evaluate manuscripts exclusively on the basis of their academic merit. An Editor must not use unpublished information in the editor's own research without the express written consent of the Author. Editors should take reasonable responsive measures when ethical complaints have been presented concerning a submitted manuscript or published paper.
Reviewers: Any manuscripts received for review must be treated as confidential documents. Privileged information or ideas obtained through peer review must be kept confidential and not used for personal advantage. Reviewers should be conducted objectively, and observations should be formulated clearly with supporting arguments, so that Authors can use them for improving the paper. Any selected Reviewer who feels unqualified to review the research reported in a manuscript or knows that its prompt review will be impossible should notify the Editor and excuse himself from the review process. Reviewers should not consider manuscripts in which they have conflicts of interest resulting from competitive, collaborative, or other relationships or connections with any of the authors, companies, or institutions connected to the papers.