Staff Publications

Staff Publications

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    '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.

    We have a manual that explains all the features 

Record number 423345
Title Intake and utilization of energy of rations with pelleted forages by dairy cows
Author(s) Honing, Y. van der
Source Landbouwhogeschool Wageningen. Promotor(en): A.J.H. van Es. - Wageningen : Pudoc - ISBN 9789022005651 - 156
Department(s) Wageningen University
Publication type Dissertation, internally prepared
Publication year 1975
Keyword(s) rundvee - melkvee - melkveehouderij - voer - voedingswaarde - korrelvoer - cattle - dairy cattle - dairy farming - feeds - nutritive value - pelleted feeds
Categories Cattle
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.<p/>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.
Comments
There are no comments yet. You can post the first one!
Post a comment
 
Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.