Rumen degradability of Mongolian pastures: a comparison of in situ and in vitro gas production techniques

1996 ◽  
Vol 1996 ◽  
pp. 227-227 ◽  
Author(s):  
A.H. Murray ◽  
D. Daalkhaijav ◽  
C.D. Wood
Keyword(s):  
Gas Production ◽  
Forest Steppe ◽  
High Mountain ◽  
In Vitro Gas Production ◽  
Production Techniques ◽  
Native Pastures ◽  
The Relationship

In Mongolia animal performance is very much dependent on the quality and quantity of natural grassland available, since certain pastoral animals may obtain as much as 98% of their annual intake from pasture. There have been few studies to date on either in vivo or in vitro degradation of native Mongolian pastures. This paper seeks to investigate the degradation characteristics of native pastures from 2 regions in Mongolia, high mountain and forest steppe. It also investigates the relationship between the in vitro gas production technique and the in sacco technique.

Relationship between in vitro gas production and in situ degradability for forage components

1998 ◽  
Vol 22 ◽  
pp. 244-246
Author(s):  
T. Ichinohe ◽  
W. J. Shand ◽  
D. J. Kyle ◽  
X. B. Chen ◽  
E. R. Ørskov
Keyword(s):  
Production Rate ◽  
Nutritive Value ◽  
Kinetic Studies ◽  
Gas Production ◽  
Soluble Carbohydrates ◽  
In Vitro Gas Production ◽  
The Relationship

Recently in vitro and in situ techniques have been used for assessing forage nutritive value for ruminants instead of laborious in vivo trials. Although, Blummel and Ørskov (1993) have shown that an in vitro gas production technique gives reliable estimates of forage nutritive value, whether the estimates could be correlated with in situ degradation are not well established. There is little known about the differences in degradation characteristics of neutral-detergent fibre (NDF) and cellular contents (CC: soluble carbohydrates, lipids and crude protein) in the rumen, and also about the relationships between component degradation rate in the rumen and gas production rate for different forages. This is because most in situ kinetic studies have followed the disappearance of insoluble cell wall constituents and comparative studies of in vitro and in situ estimates was not performed sufficiently.The objective of this experiment was to investigate the relationship between in situ degradation of forage components and in vitro gas production rate for the three forages.

Comparison of in situ and in vitro gas production techniques to estimate rumen degradation characteristics of forages

1998 ◽  
Vol 22 ◽  
pp. 247-248
Author(s):  
S. López ◽  
M. D. Carro ◽  
C. Valdés ◽  
J. S. González ◽  
F. J. Ovejero
Keyword(s):  
Gas Production ◽  
Degradation Kinetic ◽  
Production Methods ◽  
Rumen Degradation ◽  
In Vitro Gas Production ◽  
Dry Matter Degradation ◽  
Production Techniques ◽  
Kinetics Of

Quantitative expressions of the kinetics of digestion are needed to estimate more precisely the quantity and composition of nutrients digested from feeds and their subsequent efficiency of utilization by the animal (Mertens, 1993). Degradation kinetic parameters are estimated by fitting appropriate models to data resulting from the measurement of either the undigested residue or the fermentation end-products after exposure of the feed to digestion. Kinetic data can be collected using either in vitro or in situ procedures. The in situ porous synthetic fibre bag technique has been extensively used to describe the kinetics of feeds degradation in the rumen. Several in vitro gas production methods have been developed to assess fermentation kinetics. The aim of this work was to study the relationship between rumen degradation parameters of forages determined either by the in situ procedure or by the gas production technique and to evaluate the potential of gas production measurements to assess the extent of dry matter degradation in the rumen.

Evaluation of some by-Products using In situ and In vitro Gas Production Techniques

2008 ◽  
Vol 3 (1) ◽  
pp. 7-12 ◽  
Author(s):  
Besharati Maghsoud ◽  
Taghizadeh Akbar ◽  
Janmohammadi Hossein ◽  
Moghadam Gholam Ali
Keyword(s):  
Gas Production ◽  
In Vitro Gas Production ◽  
Production Techniques ◽  
By Products

Relationship between in vitro gas production and near infrared reflectance spectra of gliricidia provenances

1996 ◽  
Vol 1996 ◽  
pp. 226-226
Author(s):  
S.J. Lister ◽  
M.S. Dhanoa ◽  
J.L. Stewart ◽  
M. Gill
Keyword(s):  
Nutritive Value ◽  
Near Infrared ◽  
Gas Production ◽  
Infrared Reflectance ◽  
Near Infrared Reflectance ◽  
In Vitro Gas Production ◽  
The Relationship ◽  
Kinetics Of

The chemical composition of tropical forages is generally more complex than that of temperate forages, yet the need for simple methods to predict nutritive value is greater. Near Infrared Reflectance (NIR) spectra could provide a possible solution. NIR has been used to predict both in vitro and in vivo digestibility (Murray, 1993). Direct calibration with in vivo parameters is ideal, but factors such as different types of forages, animals and management conditions have to be taken into consideration. The gas production technique, which may be considered as an in vitro counterpart of the dacron bag technique, provides information relating to the fermentable fractions and kinetics of a forage and these parameters can be related to the NIR spectra. The aim of this study was to investigate the relationship between NIR spectra and cumulative gas production and derived parameters in tree leaves.

Relationship between in vitro gas production and near infrared reflectance spectra of gliricidia provenances

1996 ◽  
Vol 1996 ◽  
pp. 226-226
Author(s):  
S.J. Lister ◽  
M.S. Dhanoa ◽  
J.L. Stewart ◽  
M. Gill
Keyword(s):  
Nutritive Value ◽  
Near Infrared ◽  
Gas Production ◽  
Infrared Reflectance ◽  
Near Infrared Reflectance ◽  
In Vitro Gas Production ◽  
The Relationship ◽  
Kinetics Of

The chemical composition of tropical forages is generally more complex than that of temperate forages, yet the need for simple methods to predict nutritive value is greater. Near Infrared Reflectance (NIR) spectra could provide a possible solution. NIR has been used to predict both in vitro and in vivo digestibility (Murray, 1993). Direct calibration with in vivo parameters is ideal, but factors such as different types of forages, animals and management conditions have to be taken into consideration. The gas production technique, which may be considered as an in vitro counterpart of the dacron bag technique, provides information relating to the fermentable fractions and kinetics of a forage and these parameters can be related to the NIR spectra. The aim of this study was to investigate the relationship between NIR spectra and cumulative gas production and derived parameters in tree leaves.

Effect of preservation on fermentative activity of rumen fluid inoculum for in vitro gas production techniques

2005 ◽  
Vol 123-124 ◽  
pp. 107-118 ◽  
Author(s):  
Gonzalo Hervás ◽  
Pilar Frutos ◽  
F. Javier Giráldez ◽  
Manuel J. Mora ◽  
Begoña Fernández ◽  
...  
Keyword(s):  
Rumen Fluid ◽  
Gas Production ◽  
In Vitro Gas Production ◽  
Production Techniques ◽  
Fermentative Activity

Comparison of four in vitro gas production methods to study rumen fermentation kinetics of starch rich feeds

1997 ◽  
Vol 1997 ◽  
pp. 196-196
Author(s):  
S. Fakhri ◽  
A. R. Moss ◽  
D.I. Givens ◽  
E. Owen
Keyword(s):  
Rumen Fermentation ◽  
Gas Production ◽  
Production Methods ◽  
Fermentation Kinetics ◽  
In Vitro Gas Production ◽  
Production Techniques ◽  
Kinetics Of

Recently, the automatic in vitro gas production techniques (e.g. Cone. 1994; Theodorou et al., 1994) have been developed to study rumen fermentation kinetics. Many approaches have been taken. This work investigates the suitability of different methods for estimating the rumen fermentation of two starch rich feedstuffs.

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