Relationship between chemical composition and in situ rumen degradation characteristics of grass silages in dairy cows

M. Ali; J. W. Cone; G. van Duinkerken; A. Klop; J. Kruisdijk; M. C. Blok; M. Bruinenberg; W. H. Hendriks

doi:10.1016/j.njas.2014.01.002

Relationship between chemical composition and in situ rumen degradation characteristics of grass silages in dairy cows

M. Ali^*, J. W. Cone, G. van Duinkerken, A. Klop, J. Kruisdijk, M. C. Blok, M. Bruinenberg, W. H. Hendriks

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

The DVE/OEB2010 system in the Netherlands uses a large database of in situ rumen incubations with grass silage and grass hay samples to derive prediction formulas to estimate the rumen degradation characteristics of a number of feed value parameters. These in situ rumen incubations were not performed for this specific purpose and the data were generated at different research institutes over more than 40 years, using different grass management and fertilization practices and using different protocols. The objectives of this study were to 1) generate a new database on the rumen degradability of dry matter (DM), organic matter (OM), crude protein (CP) and neutral detergent fibre (NDF) of grass silages, 2) compare this new database with the old database used in the DVE/OEB2010 system, and 3) derive regression equations using the new database to investigate the relationships between chemical composition and in situ ruminal degradation characteristics of DM, OM, CP and NDF of the grass silages. Sixty nine grass silages, with a broad range in chemical composition and quality parameters, were selected and incubated using the nylon bag technique in the rumen of three lactating Holstein Friesian cows for 2, 4, 8, 16, 32, 72 and 336 h. There was a large range in the rumen degradable fractions of DM, OM, CF and NDF of the grass silages at each rumen incubation period. The data on the rumen degradation characteristics of DM, OM, CP and NDF in the present study were determined using the same standard incubation protocol, the same cows, and the same chemical analysis procedures for all the grass silage samples. Regression analysis, using the new database, showed relationships between the washable (W) fraction, rumen undegradable (U) fraction, potentially rumen degradable (D) fraction and effective rumen degradation (ED) of DM, OM, CP and NDF, respectively, and the chemical composition of the grass silages. (C) 2014 Royal Netherlands Society for Agricultural Sciences. Published by Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	9-15
Number of pages	7
Journal	NJAS Wageningen journal of life sciences
Volume	70
DOIs	https://doi.org/10.1016/j.njas.2014.01.002
Publication status	Published - 6 Dec 2014

Funding

The authors are grateful to the Higher Education Commission (HEC, Pakistan), the Dutch Product Board Animal Feed (PDV, The Hague, The Netherlands) and the Dutch Dairy Board (PZ, Zoetermeer, The Netherlands) for financial support and to BLGG AgroXpertus (Wageningen, The Netherlands) for performing the chemical analysis.

Keywords

In situ nylon bag technique
Chemical composition
Effective rumen degradation
Regression equations
Grass silages
NEUTRAL DETERGENT FIBER
DRY-MATTER
CRUDE PROTEIN
INTESTINAL DIGESTIBILITY
DEGRADABILITY
FORAGES
PREDICTION
SUPPLEMENTATION
CATTLE
SACCO

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10.1016/j.njas.2014.01.002

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@article{a9fe685732b9429e9b11898f833515d0,

title = "Relationship between chemical composition and in situ rumen degradation characteristics of grass silages in dairy cows",

abstract = "The DVE/OEB2010 system in the Netherlands uses a large database of in situ rumen incubations with grass silage and grass hay samples to derive prediction formulas to estimate the rumen degradation characteristics of a number of feed value parameters. These in situ rumen incubations were not performed for this specific purpose and the data were generated at different research institutes over more than 40 years, using different grass management and fertilization practices and using different protocols. The objectives of this study were to 1) generate a new database on the rumen degradability of dry matter (DM), organic matter (OM), crude protein (CP) and neutral detergent fibre (NDF) of grass silages, 2) compare this new database with the old database used in the DVE/OEB2010 system, and 3) derive regression equations using the new database to investigate the relationships between chemical composition and in situ ruminal degradation characteristics of DM, OM, CP and NDF of the grass silages. Sixty nine grass silages, with a broad range in chemical composition and quality parameters, were selected and incubated using the nylon bag technique in the rumen of three lactating Holstein Friesian cows for 2, 4, 8, 16, 32, 72 and 336 h. There was a large range in the rumen degradable fractions of DM, OM, CF and NDF of the grass silages at each rumen incubation period. The data on the rumen degradation characteristics of DM, OM, CP and NDF in the present study were determined using the same standard incubation protocol, the same cows, and the same chemical analysis procedures for all the grass silage samples. Regression analysis, using the new database, showed relationships between the washable (W) fraction, rumen undegradable (U) fraction, potentially rumen degradable (D) fraction and effective rumen degradation (ED) of DM, OM, CP and NDF, respectively, and the chemical composition of the grass silages. (C) 2014 Royal Netherlands Society for Agricultural Sciences. Published by Elsevier B.V. All rights reserved.",

keywords = "In situ nylon bag technique, Chemical composition, Effective rumen degradation, Regression equations, Grass silages, NEUTRAL DETERGENT FIBER, DRY-MATTER, CRUDE PROTEIN, INTESTINAL DIGESTIBILITY, DEGRADABILITY, FORAGES, PREDICTION, SUPPLEMENTATION, CATTLE, SACCO",

author = "M. Ali and Cone, {J. W.} and {van Duinkerken}, G. and A. Klop and J. Kruisdijk and Blok, {M. C.} and M. Bruinenberg and Hendriks, {W. H.}",

year = "2014",

month = dec,

day = "6",

doi = "10.1016/j.njas.2014.01.002",

language = "English",

volume = "70",

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journal = "NJAS Wageningen journal of life sciences",

issn = "1573-5214",

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TY - JOUR

T1 - Relationship between chemical composition and in situ rumen degradation characteristics of grass silages in dairy cows

AU - Ali, M.

AU - Cone, J. W.

AU - van Duinkerken, G.

AU - Klop, A.

AU - Kruisdijk, J.

AU - Blok, M. C.

AU - Bruinenberg, M.

AU - Hendriks, W. H.

PY - 2014/12/6

Y1 - 2014/12/6

N2 - The DVE/OEB2010 system in the Netherlands uses a large database of in situ rumen incubations with grass silage and grass hay samples to derive prediction formulas to estimate the rumen degradation characteristics of a number of feed value parameters. These in situ rumen incubations were not performed for this specific purpose and the data were generated at different research institutes over more than 40 years, using different grass management and fertilization practices and using different protocols. The objectives of this study were to 1) generate a new database on the rumen degradability of dry matter (DM), organic matter (OM), crude protein (CP) and neutral detergent fibre (NDF) of grass silages, 2) compare this new database with the old database used in the DVE/OEB2010 system, and 3) derive regression equations using the new database to investigate the relationships between chemical composition and in situ ruminal degradation characteristics of DM, OM, CP and NDF of the grass silages. Sixty nine grass silages, with a broad range in chemical composition and quality parameters, were selected and incubated using the nylon bag technique in the rumen of three lactating Holstein Friesian cows for 2, 4, 8, 16, 32, 72 and 336 h. There was a large range in the rumen degradable fractions of DM, OM, CF and NDF of the grass silages at each rumen incubation period. The data on the rumen degradation characteristics of DM, OM, CP and NDF in the present study were determined using the same standard incubation protocol, the same cows, and the same chemical analysis procedures for all the grass silage samples. Regression analysis, using the new database, showed relationships between the washable (W) fraction, rumen undegradable (U) fraction, potentially rumen degradable (D) fraction and effective rumen degradation (ED) of DM, OM, CP and NDF, respectively, and the chemical composition of the grass silages. (C) 2014 Royal Netherlands Society for Agricultural Sciences. Published by Elsevier B.V. All rights reserved.

AB - The DVE/OEB2010 system in the Netherlands uses a large database of in situ rumen incubations with grass silage and grass hay samples to derive prediction formulas to estimate the rumen degradation characteristics of a number of feed value parameters. These in situ rumen incubations were not performed for this specific purpose and the data were generated at different research institutes over more than 40 years, using different grass management and fertilization practices and using different protocols. The objectives of this study were to 1) generate a new database on the rumen degradability of dry matter (DM), organic matter (OM), crude protein (CP) and neutral detergent fibre (NDF) of grass silages, 2) compare this new database with the old database used in the DVE/OEB2010 system, and 3) derive regression equations using the new database to investigate the relationships between chemical composition and in situ ruminal degradation characteristics of DM, OM, CP and NDF of the grass silages. Sixty nine grass silages, with a broad range in chemical composition and quality parameters, were selected and incubated using the nylon bag technique in the rumen of three lactating Holstein Friesian cows for 2, 4, 8, 16, 32, 72 and 336 h. There was a large range in the rumen degradable fractions of DM, OM, CF and NDF of the grass silages at each rumen incubation period. The data on the rumen degradation characteristics of DM, OM, CP and NDF in the present study were determined using the same standard incubation protocol, the same cows, and the same chemical analysis procedures for all the grass silage samples. Regression analysis, using the new database, showed relationships between the washable (W) fraction, rumen undegradable (U) fraction, potentially rumen degradable (D) fraction and effective rumen degradation (ED) of DM, OM, CP and NDF, respectively, and the chemical composition of the grass silages. (C) 2014 Royal Netherlands Society for Agricultural Sciences. Published by Elsevier B.V. All rights reserved.

KW - In situ nylon bag technique

KW - Chemical composition

KW - Effective rumen degradation

KW - Regression equations

KW - Grass silages

KW - NEUTRAL DETERGENT FIBER

KW - DRY-MATTER

KW - CRUDE PROTEIN

KW - INTESTINAL DIGESTIBILITY

KW - DEGRADABILITY

KW - FORAGES

KW - PREDICTION

KW - SUPPLEMENTATION

KW - CATTLE

KW - SACCO

U2 - 10.1016/j.njas.2014.01.002

DO - 10.1016/j.njas.2014.01.002

M3 - Article

SN - 1573-5214

VL - 70

SP - 9

EP - 15

JO - NJAS Wageningen journal of life sciences

JF - NJAS Wageningen journal of life sciences

ER -

Relationship between chemical composition and in situ rumen degradation characteristics of grass silages in dairy cows

Abstract

Funding

Keywords

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