Studies On Potassium Magnesium Interaction In Coconut (Cocos nucifera)

M. JEGANATHAN
2010 COCOS  
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
more » ... 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. Reprinted from Plant Nutrition -Physiology and Applications (1990) with kind permission of Kluwer Academic Publishers.
doi:10.4038/cocos.v8i0.2066 fatcat:ausbnfugdnd5thhjpgkq4h4cbq