Resumo
The status of zinc in sugar cane, variety Co 419, troughout its life cyle, was studid in samples cut monthly, from the 6th to 15th month, from an experiment carried on under the conditions of soil and climate prevailing in Piracicaba, State of São Paulo, Brazil. The experiment consisted of 6plots, 3 fertilized and 3 unfertilized. The fertilized ones received 40 kg of N (ammonium sulfate), 100 kg P2O5 (superphosphate) and 40 kg K2O (potassium cloride) per hectare, just before planting. The zinc content was determined by the Zincon method, after separation of zinc from other ions by means of the ion Exchange Resin III, Merck. The results obtained show that there was a tendency to decrease the zinc level in the stalks, whereas it kept more or less constant in the leaves; there was an exception in January, when the zinc level in the stalks had a sharp raise: 38-90-20 and 28-60-23 ppm for the fertilized an unfertilized treatments. There was a parallelism in the absorption of zinc by the plants from 4 hills of both treatments, through the whole - plantcycle but, the total amount taken up was higher with the fertilized plot due to its greater mass production.
Absorção de zinco pela cana de açúcar, Co 419, em função da idade* * Trabalho realizado com axílio da Fundação Rockfeller e CNPq.
D. Pellegrino; R.A. Catani; H. Bergamin Filho; N.A. Glória
E. S. A. "Luiz de Queiroz"
SUMMARY
The status of zinc in sugar cane, variety Co 419, troughout its life cyle, was studid in samples cut monthly, from the 6th to 15th month, from an experiment carried on under the conditions of soil and climate prevailing in Piracicaba, State of São Paulo, Brazil.
The experiment consisted of 6plots, 3 fertilized and 3 unfertilized. The fertilized ones received 40 kg of N (ammonium sulfate), 100 kg P2O5 (superphosphate) and 40 kg K2O (potassium cloride) per hectare, just before planting.
The zinc content was determined by the Zincon method, after separation of zinc from other ions by means of the ion Exchange Resin III, Merck.
The results obtained show that there was a tendency to decrease the zinc level in the stalks, whereas it kept more or less constant in the leaves; there was an exception in January, when the zinc level in the stalks had a sharp raise: 38-90-20 and 28-60-23 ppm for the fertilized an unfertilized treatments.
There was a parallelism in the absorption of zinc by the plants from 4 hills of both treatments, through the whole - plantcycle but, the total amount taken up was higher with the fertilized plot due to its greater mass production.
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Recebido para publicação em 8/9/1962.
- CATANI, R. A.; ARRUDA, H.C.; PELLEGRINO, D. & BEBGAMIN FILHO, H. - A absorção de Nitrogênio, Fósforo, Potássio, cálcio, Magnésio, Enxôfre e Silício pela cana de açúcar, Co 419, e o seu crescimento em função da idade. An. E.S.A. "Luiz de Queiroz" 16: 167-190, 1959.
- CATANI, R. A.; PELLEGRINO, D.; BERGAMIN FILHO, H. & GLÓRIA, N.A. - A absorção do manganês pela cana de açúcar, variedade Co 419, em função da idade. An. E.S.A. "Luiz de Queiroz" 19:245-261, 1962.
- EVANS, H. - Studies in the Mineral Nutrition of Sugar Cane in British Guiana - II - The Mineral Status of Sugar Cane as Revealed by Foliar Analyses. Trop. Agric. 32:295-322, 1955.
- JOHNSON, C.M. & ULRICH, A. - Bull. Calif. Agric. Exper. Stat. 766: 71, 1959.
- YOE, J.H. & RUSH, R.M. - A New Colorimetric Reagent for Zinc. Anal. Chim. Acta. 6 (6): 526, 1952.
Datas de Publicação
-
Publicação nesta coleção
11 Set 2012 -
Data do Fascículo
1962
