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Revista Brasileira de Fruticultura

versão impressa ISSN 0100-2945versão On-line ISSN 1806-9967

Resumo

VERISSIMO, Valtair et al. Levels of calcium and boron on pear flower buds (Pyrus sp.) in southern Brazil. Rev. Bras. Frutic. [online]. 2006, vol.28, n.1, pp.28-31. ISSN 0100-2945.  http://dx.doi.org/10.1590/S0100-29452006000100011.

The objective of this study was to evaluate calcium (Ca) and boron (B) levels, in pear flower buds, on different locations, cultivars, period of the year and portion of bud. The experiments were carried out in two locations with different climatic conditions in Southern Brazil (Embrapa Clima Temperado Research Centre, in Pelotas-RS, and Experimental Station of Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina, in São Joaquim-SC), during the winter of 2000 and 2001. Three experiments were conducted, involving three cultivars, Nijisseiki (XXth Century), Kousui and Kieffer. The calcium and boron level were determined by the method adapted by Freire (1998). The levels of calcium and boron stayed practically unaltered during the winter in the flower buds of cvs. Kieffer and Nijisseiki, in Pelotas-RS. The cv. Nijisseiki had higher levels of boron than that of cv. Kieffer, more adapted to the region. Since the beginning autumn until early winter there was an increase in levels of boron, in both places and cultivars. The highest boron level was found in the basal and in the medium part of flower buds, whereas the highest levels of calcium was in the basal part.

Palavras-chave : macronutrient; micronutrient; Nijisseiki; Kousui; Kieffer.

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