Library Catalogue

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 104140
Title Intake and utilization of energy of rations with pelleted forages by dairy cows
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[door] Y. van der Honing
Author(s) Honing, Y. van der
Publisher Wageningen : Pudoc
Publication year 1975
Description 156 p.
Notes Proefschrift Wageningen
Ook verschenen als handelsuitgave
ISBN 9022005658
Tutors Es, Dr. Ir. A.J.H. van
Graduation date 1975-04-04
Dissertation no. 618
Author abstract show abstract
A survey of the literature showed that forage processing, that is grinding and pelleting, increased feed intake of ruminants. This increase, due to reduction in particle size distribution of the forage, depends mainly on forage quality, proportion of concentrates in the diet and nutrient requirement of the cow. Pellets could replace part of the concentrates; complete substitution for long forage caused digestive disorders and reduced fat content of the milk. Eating rate, microbial breakdown and production of volatile fatty acids often increased too. Processed forages offered to sheep and beef cattle depressed digestibility, which was compensated by slightly lower losses of methane and less heat production.

Data from energy balance trials at Wageningen from 1967 to 1973, mostly with 4-6 lactating Dutch Friesian cows per trial, were examined by multiple factor analysis for effects of processing. Rations in which processed forages replaced part of the long forages or the concentrates were tested in 130 trials. Processing decreased digestibility of energy in the forage by about 9 percentage units, 15%, and its metabolizability by 7 percentage units, 13%. Utilization of metabolizable energy increased, roughly compensating the decrease in metabolizability. Regressions were calculated for the prediction of digestibility and net energy of processed forage in a feed evaluation system for dairy cows, to be introduced in the Netherlands in 1977.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08202,618
FORUM ; STACKS ; NN08200,618
Keyword(s) (cab) cattle / dairy cattle / dairy farming / feeds / nutritive value / pelleted feeds
Categories Cattle
Publication type PhD thesis
Language English
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