SciELO - Scientific Electronic Library Online

 
vol.46 número5Produção da toxina Cry1Ac e preferência para alimentação e oviposição de Alabama argillacea em algodão Bt sob estresse hídricoAvaliação de painéis sob copas de seringueira resistentes ao mal-das-folhas índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Pesquisa Agropecuária Brasileira

versão impressa ISSN 0100-204X

Resumo

HENRIQUE, Paôla de Castro et al. Physiological aspects of seedling development of coffee grown under colored screens. Pesq. agropec. bras. [online]. 2011, vol.46, n.5, pp.458-465. ISSN 0100-204X.  http://dx.doi.org/10.1590/S0100-204X2011000500002.

The objective of this work was to evaluate the physiological aspects of the development of coffee seedlings grown under colored screens with different spectral characteristics. Seedlings of Catucaí Amarelo 2SL, in the stage known as "orelha de onça", were arranged in a randomized block design, with five replicates, under structures individually covered with blue, white, gray, black or red screens with 50% shade. Four months after, evaluations were done for seedling growth, pigment content of the leaves, total soluble sugars and starch contents of the leaves and roots. The red screen was the most effective in promoting growth in four out of the seven studied traits: plant height, leaf area and leaf dry weight and total dry matter. For the other characteristics, there was no difference among the screens. The pigment analysis showed that, except for the gray screen, the other ones did not differ for this trait. In leaves, the red screen promoted higher levels of carbohydrates and starch. At the root, carbohydrate contents were higher under the red and black screens. Among the five screen colors, the red one was the most efficient in the production of coffee seedlings with higher vigor and quality, with outstanding carbohydrate contents and biomass.

Palavras-chave : Coffea arabica; carbohydrates; growth; pigments; radiation quality; nursery house.

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons