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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 104528
Title Between-animal variation in the amount of energy required for the maintenance of cows
show extra info.
A.J.H. van Es
Author(s) Es, A.J.H. van
Publisher Wageningen : Pudoc
Publication year 1961
Description 116 p + 1 losse bijl
Notes Proefschrift Wageningen
Ook verschenen als handelsuitgave
Tutors Brouwer, Prof. Dr. E.
Graduation date 1961-06-23
Dissertation no. 306
Author abstract show abstract
To measure any between-animal differences in requirement of energy for maintenance of cows 38 metabolic balance trials were performed with 13 dry Friesian cows in their 7th month of pregnancy, on the same rations. For 6 of the cows measurements were also taken in the 9th month of pregnancy. A detailed description was given of new respiration chambers used and of techniques. The results of 237 balance trials with cattle with an energy balance between + 4000 and - 4000 kcal. described in the literature, were analysed statistically. In this material between-animal variation in metabolizable energy for maintenance, corrected to the same bodyweight, reached about 11 % and within some breeds 8- 10 %. In the author's trials, variation in Friesians was 4-8 % similar to results of published trials. For both sets of data a reliable figure for between-animal variation needed exclusion of such factors as differences in ration, date of measurement and pregnancy. From the author's trials utilisation of metabolizable energy for growth of foetus, foetal membranes and udder was about half of that for fattening if it was assumed that pregnancy had no influence on maintenance requirement.
Online full textINTERNET
On paper FORUM ; STACKS ; 521D17
FORUM ; STACKS ; NN08202,306
Keyword(s) (cab) restricted feeding / cattle / veterinary science / nutrition physiology
Categories Cattle / Feeding Systems, Feed Rations
Publication type PhD thesis
Language English
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