Variações no teor de alguns elementos minerais nas folhas e frutos de café (Coffea arabica L. var. 'Mundo Novo')
Palavras-chave:
teor de fósforo, absorção de nutrientes, análise química do solo, variação de nutrientes minerais, cafezal de Minas GeraisResumo
Young mature and old leaves, and berries of coffee (Coffea arabica L. 'Mundo Novo') were sampled quarterly for mineral elements, during the growing season of 1970-1971 (October through April), from a 15-Year old plantation, located in Viçosa, Minas Gerais (Brasil).
The content of Ca and P decreased in the berries begining in the first week of December. The P content of leaves remained virtually unchanged, but at higher level in the young leaves. Ca content of the young leaves increased continuously, attaining constant levels in the old ones.
K content of leaves fell during fruit growth probably as a result of redistribution between organs or diminshed availability of this element in the soil. K content of berries showed the same trend, but more intensely.
The content of Mg and Mn tended to increase in the organs sampled while the berries were growing. Leaves had an usually high Mn content.
Zn content of leaves, showing a maximum by the end of December, was not apparently affected by growing fruits. Fe changed erratically during the course of the study.
Referências
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