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Reading: Studies On Potassium Magnesium Interaction In Coconut (Cocos nucifera)

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Studies On Potassium Magnesium Interaction In Coconut (Cocos nucifera)

Author:

M. JEGANATHAN

COCOS, LK
About M.
Coconut Research Institute, Lunuwila, Sri Lanka.
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Abstract

The widespread deficiency of magnesium in coconut acts as a limiting factor to increased
production. Two ongoing experiments on potassium-magnesium (K-Mg) interaction in
coconut conducted in lateritic gravels (ultisols), in the wet and intermediate agroclimatic zones
of Sri Lanka showed significant yield responses (P=0.01) to differential K treatments, in the
wet zone, but not in the intermediate zone. Differential Mg treatments, however, did not give
rise to yield responses. Leaf and nut water analysis showed significant changes in the
concentrations of Na, K and CI (P=0.001), with a distinct inverse relationship between Na and
K when K was applied. Differential Mg applications showed a significant effect only for leaf
Mg (P=0.001), in the fourth year of the experiment, in the wet zone. Results indicate the
usefulness of nut water analysis as an additional diagnostic tool, for Na, K and CI
How to Cite: JEGANATHAN, M., (2010). Studies On Potassium Magnesium Interaction In Coconut (Cocos nucifera). COCOS. 8, pp.1–12. DOI: http://doi.org/10.4038/cocos.v8i0.2066
Published on 08 Jul 2010.
Peer Reviewed

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