Effect of fat content on degradability and fermentability of concentrate foods in situ, in vitro and with gas production technique

1998 ◽  
Vol 22 ◽  
pp. 212-214
Author(s):  
A. R. Moss ◽  
S. Fakhri ◽  
D. I. Givens ◽  
E. Owen
Keyword(s):  
Oil Extraction ◽  
Fat Content ◽  
Gas Production ◽  
Production Technique ◽  
Factors Affecting ◽  
Rumen Microbes ◽  
Production Techniques ◽  
Main Factors

Fat content is one of the main factors affecting the degradability and fermentability characteristics of oil-rich foods estimated by means of the in situ, in vitro and gas production techniques. Filtered fat, considered degraded/fermented, is of limited value to the rumen microbes and may inhibit fermentation. Pre-extraction of oil may be one way to solve this problem. The rumen organic matter degradability (OMD) and fermentability (FOM) of concentrate foods were evaluated in this study with and without oil extraction.

Comparison of parameters from the Theodorou gas production technique using nitrogen-free and nitrogen-rich media as predictors of dry-matter intake and digestibility

1998 ◽  
Vol 22 ◽  
pp. 172-174
Author(s):  
D. L. Romney ◽  
F. C. Cadario ◽  
E. Owen ◽  
A .H. Murray
Keyword(s):  
Dry Matter ◽  
Gas Production ◽  
Dry Matter Intake ◽  
Production Technique ◽  
N Supply ◽  
Fermentation Method ◽  
Rich Media ◽  
Production Techniques

Parameters from in vitro gas production techniques could have potential as predictors of dry-matter intake (DMI) and digestibility. Fermentation is usually carried out under conditions where nitrogen (N) is not limiting. Therefore where N supply is a constraint to intake and digestibility, prediction equations may be inaccurate. This study compared the use of N-free and N-rich media in an in vitro fermentation method (Theodorou et al., 1994) and studied the relationships between in vitro and in vivo parameters obtained using both media.

scholarly journals Comparison of in vitro gas production technique with in situ nylon bag technique to estimate dry matter degradation

2011 ◽  
Vol 50 (No. 2) ◽  
pp. 60-67 ◽  
Author(s):  
A. Kamalak ◽  
O. Canbolat ◽  
Y. Gurbuz ◽  
O. Ozay
Keyword(s):  
Dry Matter ◽  
Degradation Kinetics ◽  
Insoluble Fraction ◽  
Gas Production ◽  
Barley Straw ◽  
Production Technique ◽  
In Vitro Gas Production ◽  
Dry Matter Degradation

Dry matter (DM) degradation of wheat straw (WS), barley straw (BS), lucerne hay (LH) and maize silage (MS) was determined using two different techniques: (i) in vitro gas production and (ii) nylon bag degradability technique. In vitro gas production and in situ DM disappearance were measured after 3, 6, 12, 24, 48, 72 and 96 hours of incubation. In situ and in vitro DM degradation kinetics was described using the equation y = a + b (1 &ndash; e<sup>ct</sup>). In all incubations there were significant (P &lt; 0.001) correlations between gas production and in situ DM disappearance or estimated parameters ((a + b)<sub>ga</sub><sub>s</sub> and (a + b)<sub>is</sub> or (a + b)<sub>gas</sub> and EDMD<sub>is</sub>) whereas there were no significant (P &gt; 0.05) correlations between c<sub>gas</sub> and c<sub>is</sub> or b<sub>gas</sub> and b<sub>is</sub>. Gas production from the insoluble fraction (b) alone explained 98.3% of the variation of EDMD. The inclusion of gas production from the quickly soluble fraction (a) and rate constant (c) of gas production in the regression equation improved the accuracy of EDMD prediction. The correlations between the results of both methodologies seem to be sufficiently strong to predict degradability parameters from gas production parameters. It was concluded that the in vitro gas production technique has good potentiality to predict in situ DM disappearance and some DM degradation parameters. &nbsp; &nbsp;

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.

Influence of feed processing on the in vitro fermentation profiles of ruminant feeds using the gas production technique

1995 ◽  
Vol 1995 ◽  
pp. 117-117
Author(s):  
E. R. Deaville
Keyword(s):  
Fine Particles ◽  
Gas Production ◽  
Complex Nature ◽  
Production Technique ◽  
Feed Processing ◽  
Main Method ◽  
Alternative Approach ◽  
Ruminant Animals

As feed evaluation methods for ruminants move towards a more dynamic approach of assessing nutrient supply, in order to reflect the complex nature and microbial intervention in the digestion process in ruminant animals, it is becoming increasingly important to predict the rate, extent and site of digestion. Presently the main method for measuring feed degradation is the in situ polyester bag technique. However, it is now known that this method is not appropriate for starch rich feeds due to the loss of fine particles. An alternative approach is to measure the rumen fermentation kinetics using the gas production technique as this may also give a better estimate of energy available for microbial growth. An experiment was undertaken to study the influence of feed processing on the fermentation profiles of ruminant feeds using an automated gas production system.

A comparison between in vitro digestibility, in situ degradability and a gas production technique for predicting the in vivo digestibility of whole-crop wheat

1998 ◽  
Vol 22 ◽  
pp. 33-35
Author(s):  
A. T. Adesogan ◽  
E. Owen ◽  
D. I. Givens
Keyword(s):  
Nutritive Value ◽  
Gas Production ◽  
In Vitro Digestibility ◽  
Production Technique ◽  
Grass Silage ◽  
Laboratory Techniques

Several published reports on the nutritive value of whole-crop wheat (WCW) have been based on estimations from laboratory techniques, some of which were developed for grass silage. However, there is little information on the accuracy of such estimations. Therefore the aim of this study was to evaluate the suitability of predicting the in vivo digestibility of WCW from various less animal-dependent techniques.

scholarly journals Prediction of In Situ Ruminal Degradability of Forages in Buffaloes Using the In Vitro Gas Production Technique

2019 ◽  
Vol 42 (2) ◽  
pp. 128-136 ◽  
Author(s):  
G.F. Guadayo ◽  
A.A. Rayos ◽  
F.E. Merca ◽  
A.G. Tandang ◽  
M.M. Loresco ◽  
...  
Keyword(s):  
Gas Production ◽  
Production Technique ◽  
In Vitro Gas Production ◽  
Ruminal Degradability

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

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.

Influence of feed processing on the in vitro fermentation profiles of ruminant feeds using the gas production technique

1995 ◽  
Vol 1995 ◽  
pp. 117-117
Author(s):  
E. R. Deaville
Keyword(s):  
Fine Particles ◽  
Gas Production ◽  
Complex Nature ◽  
Production Technique ◽  
Feed Processing ◽  
Main Method ◽  
Alternative Approach ◽  
Ruminant Animals

As feed evaluation methods for ruminants move towards a more dynamic approach of assessing nutrient supply, in order to reflect the complex nature and microbial intervention in the digestion process in ruminant animals, it is becoming increasingly important to predict the rate, extent and site of digestion. Presently the main method for measuring feed degradation is the in situ polyester bag technique. However, it is now known that this method is not appropriate for starch rich feeds due to the loss of fine particles. An alternative approach is to measure the rumen fermentation kinetics using the gas production technique as this may also give a better estimate of energy available for microbial growth. An experiment was undertaken to study the influence of feed processing on the fermentation profiles of ruminant feeds using an automated gas production system.

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