Comparacao de métodos de análise de cloreto e teores nas folhas, graos e casca de café (Coffea arabica L. cv. catuaí vermelho)
The experiment was conducted at the Experimental Station of EPAMIG located in Sao Sebastiao do Paraíso (MG) on a Dusky Red Latosol. Both, sources of K (KCl, K2SO4 and K-Mag) and doses of K (0, 100, 200 and 400 g K/hole) in the coffee tree (Coffea arabica, L. cv. Catuaí Vermelho) were studied. 96 samples of leaves, grains and husk of coffee tree harvested during the years of 1993 and 1994 were used to determine the chloride content by the Mohr's Volhard's and mercuremetrical methods in order to correlate with the potentiometrical titration method, used as standard. At each year, the effect of sources and doses of K on the chloride contents of each material and methods investigated as well as for fruits (husk + grain) were evaluated. The mercuremetrical method is the most convenient to determine chloride in leaves, husk and grains due to its simplicity and better determination of the final titration point. The highest chloride contents were found in leaf, husk, fruit and grain and an increase in chloride content in these parts was observed with the increase in KCl doses.
| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
1997
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| Subjects: | COFFEA ARABICA, CATUAI, HOJAS, GRANOS, PERGAMINO, CLORO, ANALISES DE TEJIDOS, METODOS, |
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