Estados sobre a alimentação mineral do cafeeiro: XVII - efeito da adubação NPK na composição química do solo, do fruto e na qualidade da bebida (Nota preliminar)
1965
Amorim, H. V. de | Scoton, L. C. | Castilho, A. de(Secretaria da Agricultura do Estado de São Paulo Secção de Fiscalização e Classificação de Café) | Gomes, F. Pimentel(E.S.A. Luiz de Queiroz) | Malavolta, E.
葡萄牙语. Foram feitas determinações dos teores de N, P e K no solo e nos frutos de cafeeiros submetidos a um ensaio fatotorial 2x2x2. Verificou-se que apenas as aplicações de P e K elevaram os teoresdos elementos no solo. O uso de N e K aumentou o teor dêsses nutrientes no fruto. A qualidade da bebida foi prejudicada pela falta de P na adubação.
显示更多 [+] 显示较少 [-]英语. This paper gives some preliminary results from determinations of the effect of N, P and K fertilization on the chemical composition of soil and coffee berries, as well in the quality of the beverage there of. The main findings are as follows: a) The use of P arid K caused an increase in the level of the respective element in the soil; no similar effect of N fertilisation was ascertained. b) N content in the bean tuas raised by that of K; P increased N content in the pulp. The application of P failed to raise its level in the fruit; the use of N, however decreased P % in the pulp. The use of KCl increased the level of K in the fruit. c) Fruits collected in treatments where P was omitted gave significantly lower quality beverage. A positive correlation was found between P content in the soil and quality of the beverage; the meaning - if any - of such correlation cannot be evaluated at present.
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