Estructura y distribución lumínica en el dosel de dos progenies de café con ángulos foliares diferentes

Carlos Andrés Unigarro; Jhon Félix Trejos Pinzón; José Ricardo Acuña Zornosa

doi:10.38141/10778/72104

A continuação apresentamos os resultados da pesquisa para a cafeicultura colombiana:

Estrutura e distribuição de luz no dossel de duas progênies de café com diferentes ângulos foliares

Como Citar

Unigarro, C. A., Trejos Pinzón, J. F., & Acuña Zornosa, J. R. (2021). Estrutura e distribuição de luz no dossel de duas progênies de café com diferentes ângulos foliares. Cenicafé Journal, 72(1), e72104. https://doi.org/10.38141/10778/72104

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Publicado: 23 Julho 2021

https://doi.org/10.38141/10778/72104

Palavras chave

Coffea arabica L.

hojas

ramas

tamaño

coeficiente de extinción

Coffea arabica L.

leaves

branches

size

extinction coefficient

Coffea arabica L.

folhas

galhos

tamanho

coeficiente de extinção

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v. 72 n. 1 (2021): Cenicafe Journal

seção

Artigos

Termos de licença (See)

Este trabalho está licenciado sob uma licença Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Carlos Andrés Unigarro

Centro Nacional de Investigaciones de Café

https://orcid.org/0000-0002-7344-3211

Jhon Félix Trejos Pinzón

Centro Nacional de Investigaciones de Café

https://orcid.org/0000-0003-2349-2856

José Ricardo Acuña Zornosa

Centro Nacional de Investigaciones de Café

https://orcid.org/0000-0001-6935-2264

Resumo

Em lavouras perenes, incluindo o café, poucos estudos associam o ângulo de inclinação foliar com a estrutura e distribuição da luz presente na copa. No presente estudo, foram determinadas as diferenças na estrutura e na distribuição teórica da luz no dossel de duas progênies de café com ângulos foliares.

diferente. Na Estação Experimental Naranjal de Cenicafé (Caldas, Colômbia), Coffea arabica L. plantas com quatro anos semeadas, com densidade de 6.668 plantas / ha, das progênies CU1911 (folhas inclinadas verticalmente) e CX2391 (folhas inclinadas horizontalmente). Sete variáveis ??estruturais associadas à folhagem e sete com respeito ao caule foram medidas, e nove variáveis ??foram medidas em três perfis de árvores. Os parâmetros das funções Elipsoidal e Beta, coeficiente de extinção, fração de interceptação de radiação e índice de área foliar iluminada foram estimados matematicamente. As comparações foram feitas com o teste t de Mann-Whitney ou U (? = 0,05) entre os genótipos e com o teste de Duncan (? = 0,05) entre os perfis. Características como o tamanho da folha, o número de folhas e, em menor medida, a altura da planta, mostram alterações que podem estar associadas à distribuição da luz (coeficiente de extinção) dentro da copa, e esta com o ângulo da folha. . A fração de interceptação da radiação e o índice de área foliar iluminada sugerem diferentes desempenhos fotossintéticos teóricos. O crescimento dos ramos não foi associado ao gradiente de luz.

Biografia do autor (See)

Carlos Andrés Unigarro, Centro Nacional de Investigaciones de Café

Investigador Científico I. Disciplina de Fisiología Vegetal, Centro Nacional de Investigaciones de Café, Cenicafé.

Jhon Félix Trejos Pinzón, Centro Nacional de Investigaciones de Café

Asistente de Investigación. Disciplina de Experimentación, Cenicafé.

José Ricardo Acuña Zornosa, Centro Nacional de Investigaciones de Café

Investigador Científico III. Disciplina de Fisiología Vegetal, Cenicafé.

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