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Library Catalogue

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    Union Catalogue of Agricultural Libraries in the Netherlands

    The WUR Library Catalogue contains bibliographic data on books and periodicals held by the libraries of Wageningen University and Research Centre and some 15 associated libraries. Holding data are added to each record.

    Subjects covered include Agrotechnology, Food and Food Production, Plant and Animal Sciences, Soil Science, Geo-information, Landscape and Spatial Planning, Water and Climate, Ecosystem Studies, Economics and Society.

    The joint collections of the participating libraries cover a substantial part of the internationally available scientific literature in these disciplines.

    As far as Dutch scientific literature in these fields is concerned, coverage can be considered near 100%, including much of the so-called "grey literature".

    All titles are entered in their original language. Keywords are added to facilitate subject searching.

    The database is updated every day and now contains over 830.000 records.

Record number 104087
Title The ionic balance of the sugar-beet plant
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[door] F. van Egmond
Author(s) Egmond, F. van
Publisher Wageningen : Pudoc
Publication year 1975
Description 70 p.
Notes Proefschrift Wageningen  show all notes
Ook verschenen als handelsuitgave
ISBN 9022005488
Tutors Schuffelen, Prof. Dr. A.C. ; Wit, Prof. Dr. Ir. C.T. de
Graduation date 1975-03-19
Dissertation no. 615
Author abstract show abstract
The ionic balance of the sugar-beet plant was studied by measuring dry weight and chemical composition of every leaf, the crown and the root during the growing season.

The sugar-beet plant has an almost neutral uptake. The nitrate and sulphate reduction determines the amount of carboxylates in the plant. Accumulation of carboxylates prevents large changes of cell-pH because of the ion-uptake and ion-utilization processes.

In every plant part the carboxylates are a quantitative measure of the amount of nitrate reduced. It is concluded that nitrate is mainly reduced in the leaves and to a small extent in the root.

It is proved that for the sugar-beet plant, Cl can be used as an index element to calculate the supply of the various ions to the various plant parts. Redistribution of potassium, calcium, magnesium, phosphate and organic N is determined by comparing the actual and calculated amounts in the various plant parts. The redistribution of potassium from the old leaves to the root is counterbalanced by redistribution of divalents in the opposite direction. The redistribution of the divalents takes place from organs with a relatively small oxalate production towards organs with a relatively large oxalate production.

In an appendix a rapid carboxylate determination is described.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08200,615
FORUM ; STACKS ; NN08202,615
Keyword(s) (cab) beta vulgaris / sugarbeet / botany
Categories Sugarbeet
Publication type PhD thesis
Language English
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