The effects of applied N , K and Mg on the distribution of magnesium in the plant | Effects of applied N [nitrogen], K [potassium] and Mg [magnesium] on the distribution of magnesium in the plant
1973
McIntosh, S. | Crooks, P. | Simpson, K.
Four samples of soil from a field experiment, with a range of exchangeable magnesium, were used in a pot experiment to study the effects of varying the N- and K-levels on water-soluble, acetone-soluble (chlorophyll) and insoluble (fibre) magnesium in the grass. Irrespective of treatment, water-soluble and total magnesium concentrations in the plant increased as the season progressed. Irrespective of the amount of potassium applied there was a very good correlation between water-soluble and total magnesium in the grass. There was also a good linear relationship at each cut between exchangeable soil magnesium and the concentration of both total and water soluble magnesium in the plant, but not with acetone-soluble or insoluble magnesium. Increasing potassium fertilizer highly significantly reduced total and water-soluble magnesium and increased the fibre magnesium content of the grass. Increasing N increased total and water-soluble magnesium only at the low K level.
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