Document Detail

Starch supplementation of grass harvested at two stages of maturity prior to ensiling: intake, digestion, and degradability by dairy cows.
MedLine Citation:
PMID:  9749388     Owner:  NLM     Status:  MEDLINE    
The effects of the maturity of grass prior to ensiling and the supplementation of starch to grass silage on apparent digestibility, degradability, rumen content, and feed intake by dairy cows were investigated using a Latin square design. Treatments were silages from early or late cut grass with or without 4 kg of supplemental flaked corn starch. The silage from early cut grass contained more N and sugars than did the silage from late cut grass but was lower in neutral detergent fiber (NDF). Degradation characteristics were not different between the two silages. Apparent digestibilities of dry matter (DM), organic matter (OM), and N in the silage from late cut grass were lower than those in the silage from early cut grass, but NDF digestibility was not affected. Starch supplementation increased the lag phase for DM and OM in both silages, but the rate of degradation was decreased for NDF. Starch supplementation did not influence digestibilities of DM and OM in silage from early cut grass but decreased the digestibilities of DM and OM in silage from late cut grass. Crude protein and NDF digestibilities were decreased for silages from early and late cut grass. Starch supplementation increased NDF in the rumen of cows fed the silage from early cut grass, but NDF was not affected by starch supplementation for cows fed the silage from late cut grass. Rumen-degradable starch negatively influences degradability and apparent OM digestibility; the extent of the decrease is related to the maturity of the NDF.
H De Visser; A Klop; C J Van der Koelen; A M Van Vuuren
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of dairy science     Volume:  81     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  1998 Aug 
Date Detail:
Created Date:  1998-11-13     Completed Date:  1998-11-13     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2221-7     Citation Subset:  IM    
DLO-Institute for Animal Science and Health, Department of Ruminant Nutrition, Lelystad, The Netherlands.
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MeSH Terms
Animal Feed*
Cattle / metabolism*
Dietary Carbohydrates / administration & dosage*
Dietary Fiber / administration & dosage
Dietary Proteins / administration & dosage
Poaceae / growth & development*
Rumen / metabolism
Starch / administration & dosage*
Zea mays
Reg. No./Substance:
0/Dietary Carbohydrates; 0/Dietary Proteins; 9005-25-8/Starch

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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