Relações entre o coeficiente de cultura e cobertura vegetal do feijoeiro: erros envolvidos e análises para diferentes intervalos de tempo - DOI: 10.4025/actasciagron.v26i4.1815

Gerson Araujo de Medeiros; Flavio Bussmeyer Arruda; Emilio Sakai

doi:10.4025/actasciagron.v26i4.1815

Relations between crop coefficient and vegetative ground cover of beans: errors involved and analyses for different time intervals - DOI: 10.4025/actasciagron.v26i4.1815

Authors

Gerson Araujo de Medeiros UNIPINHAL Author
Flavio Bussmeyer Arruda Institudo Agronômico do Estado de São Paulo Author
Emilio Sakai Institudo Agronômico do Estado de São Paulo Author

DOI:

https://doi.org/10.4025/actasciagron.v26i4.1815

Keywords:

evapotranspiração, curva de cultura, evapotranspirômetros, feijoeiro

Abstract

The purpose of this work was to evaluate the errors involved in the use of evapotranspirometers to determine the relation between the crop coefficient (kc) and the percentage of vegetative ground cover (%CVeg) of the bean plant, calculated for average intervals varying from one to ten days, and the influence of these intervals on the relations obtained, as well as to compare two ways of analyzing kc data. The experiment, which involved the sowing of beans in four evapotranspirometers, was conducted at the IAC – Campinas Institute of Agronomy. The kc was determined for the intervals evaluated here, based on the water balance. The main errors identified involved the uncontrolled entrance of water and the greater development of the plants sown inside the evapotranspirometers than those surrounding them. A sequential analysis allowed for a greater availability of data from which to derive the relations between kc and %CVeg, which were statistically significant in all the forms of analysis and intervals evaluated

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Author Biography

Gerson Araujo de Medeiros, UNIPINHAL

possui graduação em Engenharia Agrícola pela Universidade Estadual de Campinas (1987), especialização em Drenagem e Manejo de Bacias Hidrográficas pela Universidade de Taubaté (UNITAU), mestrado em Engenharia Agrícola pela Universidade Estadual de Campinas (1996) e doutorado em Engenharia Agrícola pela Universidade Estadual de Campinas (2002). Atualmente é professor do Centro Universitário Salesiano de São Paulo (UNISAL) e do Centro Universitário de Espírito Santo do Pinhal (UNIPINHAL). Tem experiência nas áreas de Eng. Agrícola, Eng. Agronômica e Eng. Ambiental, com ênfase em Engenharia de Ãgua e Solo, atuando principalmente nos seguintes temas: hidráulica, hidrologia, conservação e uso do solo, climatologia, diagnóstico ambiental, recursos hídricos e irrigação Currículo Lattes

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Published

2008-04-11

Issue

Vol. 26 No. 4 (2004)

Section

Agronomy

License

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I Declare that current article is original and has not been submitted for publication, in part or in whole, to any other national or international journal.

The copyrights belong exclusively to the authors. Published content is licensed under Creative Commons Attribution 4.0 (CC BY 4.0) guidelines, which allows sharing (copy and distribution of the material in any medium or format) and adaptation (remix, transform, and build upon the material) for any purpose, even commercially, under the terms of attribution.

How to Cite

Medeiros, G. A. de, Arruda, F. B., & Sakai, E. (2008). Relations between crop coefficient and vegetative ground cover of beans: errors involved and analyses for different time intervals - DOI: 10.4025/actasciagron.v26i4.1815. Acta Scientiarum. Agronomy, 26(4), 513-519. https://doi.org/10.4025/actasciagron.v26i4.1815