Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 525634
Title Interrelationships between potassium and magnesium absorption by oats (Avena sativa L.)
Author(s) Yoshida, F.
Source University. Promotor(en): A.C. Schuffelen. - Wageningen : Pudoc - ISBN 9789022001035 - 103
Publication type Dissertation, internally prepared
Publication year 1964
Keyword(s) haver - avena sativa - plantenvoeding - kunstmeststoffen - mest - magnesium - kalium - oats - plant nutrition - fertilizers - manures - potassium
Categories Cereals / Plant Nutrition Physiology / Fertilizers, Fertilizer Application
Abstract Interactions in Mg and K uptake were studied especially in relation with the following factors affecting ion uptake, a. the mechanisms of absorption of both ions involved, b. the relationship between absorption of the ions and their concentrations in the nutrient solution, c. the relationship between absorption of the ions and their ratios in the nutrient solution, particularly K: Mg, and the effects of H, Ca, N and P on the absorption of K and Mg.

These factors were examined in long and short experiments. Results were tested for correspondence with the carrier theory and the adsorption theory of ion absorption. Both theories proved useful in explaining the characteristics of ion absorption in oats. The possibility of a system of adsorption before absorption of ions through a carrier system was considered but was not further explored in this study. The mathematical models for a combination of the two systems were similar to those employed for the carrier theory.

In both tops and roots of oat plants grown in the long-term experiment, Mg and K contents were inversely correlated. This antagonism could be explained as competition for carrier sites common for both ions. Mg absorbed by the root mechanism common for Mg and K was not transported into tops in the shortterm experiment, when plants had low ratios of K:Mg.

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