Estudos sobre a alimentação mineral do cafeeiro: XII. efeito da adubação na composição mineral das fôlhas
DOI:
https://doi.org/10.1590/S0071-12761964000100008Resumen
Leaf samples from coffee plants under three different fertilizations, namely NPK, NP and PK, were collected for chemical analysis. It was found that the contents of N, K, Ca, Mg and S in the first, second, third and fourth pair of leaves were the same from the statistical point of view. On the onder hand, there was a significant effect of the position of the leaf in the branch on the P content, which was higher in the first pair. With the exception of the P level ,the four pairs of leaves are chemically uniform. Nevertheless it is not considered as convenient to mix all kinds of leaves into one sample, since the composition may vary a great deal when sampling is done some other time, such as the period of fruit growing. It is recommended therefore that either the third or the fourth pair leaves should be collected for routine work in foliar diagnosis.Descargas
Los datos de descarga aún no están disponibles.
Descargas
Publicado
1963-12-31
Número
Sección
naodefinida
Cómo citar
Malavolta, E., Graner, E., Haag, H. P., & Sarruge, J. (1963). Estudos sobre a alimentação mineral do cafeeiro: XII. efeito da adubação na composição mineral das fôlhas . Anais Da Escola Superior De Agricultura Luiz De Queiroz, 21, 73-78. https://doi.org/10.1590/S0071-12761964000100008