scholarly journals Estimating rumen degradability of forages from semi-natural grasslands, using nylon bag and gas production techniques

2004 ◽  
Vol 51 (4) ◽  
pp. 351-368 ◽  
Author(s):  
M.H. Bruinenberg ◽  
A.H. Van Gelder ◽  
P. Gonzalez Perez ◽  
V.A. Hindle ◽  
J.W. Cone
Keyword(s):  
Gas Production ◽  
Natural Grasslands ◽  
Production Techniques

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.

Relationship betweenin vitrogas production and neutral detergent fibre disappearance in three tropical grasses

1996 ◽  
Vol 1996 ◽  
pp. 219-219
Author(s):  
M. Herrero ◽  
N.S. Jessop
Keyword(s):  
Cell Wall ◽  
Gas Production ◽  
Adequate Description ◽  
Tropical Grasses ◽  
Neutral Detergent Fibre ◽  
Early Stages ◽  
Production Techniques ◽  
Gas Volume

In vitrogas production techniques have been used to nutritionally characterise feedstuffs for ruminants. Consideration of both the soluble and insoluble fractions has recently been shown to be essential for adequate description of cell wall disappearance (Jessop and Herrero, 1996). This study investigates how gas production measurements can be used to predict neutral detergent fibre (NDF) disappearance by correcting for the gas volume produced in the early stages of fermentation from neutral detergent solubles (NDS). The study was carried out using three tropical grasses.

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.

Comparison of inocula from sheep and cattle for thein vitrogas production technique under tropical conditions

1999 ◽  
Vol 1999 ◽  
pp. 151-151 ◽  
Author(s):  
I.C.S. Bueno ◽  
A.L. Abdalla ◽  
S.L.S. Cabral Filho ◽  
D.M.S.S. Vitti ◽  
E. Owen ◽  
...  
Keyword(s):  
Dry Matter ◽  
Rumen Fluid ◽  
Small Ruminants ◽  
Gas Production ◽  
Barley Straw ◽  
Tropical Conditions ◽  
Production Techniques ◽  
Microbial Mass

The use of small ruminants, such as sheep, in metabolism studies is more convenient as handling problems are reduced and their maintenance costs are lower, in comparison with cattle. However in vivo digestibility estimates obtained at maintenance are known to differ between these two species. With the increased use ofin vitrogas production techniques, to evaluate ruminant feedingstuffs, it is of great importance to identify whether the species from which the rumen fluid inoculum is obtained has a significant influence on the results obtained.Rumen fluid samples were obtained from a non-lactating Holstein cow (C) and six wether sheep (S) offered the same diet (80 % tropical grass and 20 % dairy concentrate) and prepared so as to have similar dry matter (DM) contents and therefore potentially the microbial mass. Nine substrates (two tropical grasses 1-2, tropical alfalfa 3, barley straw 4, and five temperate grasses 5-9) were examined.

Determining of nutritive values of tomato pomace using in situ and gas production techniques

2009 ◽  
Vol 2009 ◽  
pp. 194-194
Author(s):  
A Taghizadeh ◽  
V Palanghi ◽  
A Safamehr ◽  
A Nobakht ◽  
Y Mehmannavaz ◽  
...  
Keyword(s):  
Human Population ◽  
Gas Production ◽  
Tomato Pomace ◽  
Industrial Areas ◽  
Nutritive Values ◽  
Production Techniques ◽  
Feeding Value ◽  
Fermentation Pattern ◽  
By Products

The amount of by-product feedstuffs generally increases as the human population increases and economies grow. Large quantities of by-products are used in the ruminant’s diet in agro-industrial areas. (Gasa, et al. 1989). However, little is known about their fermentation pattern in the rumen and a better understanding of their digestion and products of fermentation is necessary in order to properly balance their introduction into the diets and the knowledge about their potential feeding value is insufficient.

A comparison between two in vitro gas production techniques to study fermentation profiles of three foodstuffs

1998 ◽  
Vol 22 ◽  
pp. 207-208
Author(s):  
R. S. Lowman ◽  
N. S. Jessop ◽  
M. K. Theodorou ◽  
M. Herrero ◽  
D. Cuddeford
Keyword(s):  
Pressure Transducer ◽  
Rumen Fluid ◽  
Gas Production ◽  
In Vitro Gas Production ◽  
Production Techniques ◽  
Gas Tight ◽  
Gas Volume ◽  
Kinetics Of ◽  
Made In

Following the development of the Menke technique in 1979, the measurement of gas production in vitro has become increasingly popular for investigating the kinetics of rumen fermentation. The aim of this study was to compare the gas production profiles for three foods using two in vitro gas production techniques; the Menke et al. (1979) technique (MT) and the pressure transducer technique (PTT) (Theodorou et al., 1994). Both techniques involve recording gas production throughout the incubation of a food sample with rumen fluid. The MT incubations are made in gas-tight syringes where the volume of gas produced causes the plunger to move up the syringe barrel. The PTT involves measuring gas production in fermentation bottles using a pressure transducer and syringe assembly to measure the pressure and corresponding gas volume. As the medium to rumen fluid ratios also differ between techniques; 2:1 in the Menke technique and 9:1 in the PTT, both ratios were investigated in this study.

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.

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