scholarly journals Effect of Planting Pattern and Cutting Height on In Vitro Digestibility and in Sacco Degradability of Napier Grass Mixed with Silver Leaf Desmodium at Bako, Western Ethiopia

2013 ◽  
Vol 2 (2) ◽  
pp. 22
Author(s):  
D Diba ◽  
A Tolera
Keyword(s):  
Napier Grass ◽  
Planting Pattern ◽  
Cutting Height ◽  
Western Ethiopia ◽  
In Sacco Degradability ◽  
In Sacco

The need to complement in vitro gas production measurements with residue determinations from in sacco degradabilities to improve the prediction of voluntary intake of hays

1997 ◽  
Vol 64 (1) ◽  
pp. 71-75 ◽  
Author(s):  
M. Blümmel ◽  
P. Bullerdieck
Keyword(s):  
Volume Ratio ◽  
Gas Production ◽  
Published Data ◽  
Fatty Acid Production ◽  
Residue Determination ◽  
In Vitro Gas Production ◽  
Gas Volume ◽  
In Sacco Degradability ◽  
In Sacco

AbstractThe need to complement in vitro gas production measurements with residue determination is demonstrated by the recalculation and reassessment of published data on in vitro gas production, in sacco degradabilities and voluntary dry matter intake (DMI). The in sacco degradability — gas volume ratio was determined at 24 and 48 h of incubation, termed partitioning factor (PF) and combined with rate and extent parameters of in sacco degradability and in vitro gas production to predict DMI. In vitro gas production and in sacco degradability characteristics (a + b) and c as described by the equation y = a + b(1−ect) explained 0·373 and 0·668 respectively of the variation in DMI of 19 legume and grass hays. The complementation of gas production parameters by the PF24 increased the R2 value to 0·744 with PF24 accounting for 0·407 of the variation in DMI, the rate of gas production (c) for 0·218 and the extent of gas production (a + b) for 0·119 of the variation in DMI. As a single parameter, PF48 showed the highest correlation (R2 = 0·597) with DMI but the combination of PF4S with rate and extent of in sacco or in vitro gas production measurements did not improve the correlation further, probably due to an intercorrelation between rates of fermentation and PF4S. Hays which were degraded at faster rates had higher PF values indicating proportionally higher microbial yield and lower short-chain fatty acid production per unit substrate degraded. Generally, hays with high in sacco degradabilities but proportionally low gas production i.e. hays with high PF values showed higher DMI.

Effect of fungal treatment on the chemical composition, in vitro digestibility and in sacco degradability of wheat straw

2003 ◽  
Vol 2003 ◽  
pp. 166-166
Author(s):  
H. Fazaeli ◽  
A. Azizi ◽  
Z. A. M. Jelan ◽  
S. A. Mirhadi
Keyword(s):  
Chemical Composition ◽  
Wheat Straw ◽  
Nutritive Value ◽  
White Rot Fungi ◽  
White Rot ◽  
In Vitro Digestibility ◽  
Fungal Treatment ◽  
In Sacco Degradability ◽  
In Sacco

Fungal treatment has been recently considered as a promising method for improving the nutritive value of straw (Zadrazil et al., 1997). Several studies have been conducted to identify species of white-rot fungi for assessing their ability to improve the nutritive value of straw (Yamakamwa et al., 1992). Since there are many species of fungi in nature, there is an interest in characterising of some species. The objectives of this experiment were to study the effect of five Pleurotus fungi on the chemical composition, in vitro digestibility and in sacco degradability of wheat straw and evaluate their effect in upgrading the nutritive value of lignicellulosic materials.

scholarly journals Prediction of aspects of neutral detergent fibre digestion of forages by chemical composition and near infrared reflectance spectroscopy

2005 ◽  
Vol 56 (2) ◽  
pp. 187 ◽  
Author(s):  
S. Andrés ◽  
F. J. Giráldez ◽  
J. S. González ◽  
R. Peláez ◽  
N. Prieto ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Near Infrared ◽  
Chemical Data ◽  
In Vitro Digestibility ◽  
Near Infrared Reflectance ◽  
Independent Variables ◽  
Neutral Detergent Fibre ◽  
In Sacco Degradability ◽  
In Sacco

Sixty-two herbage samples, harvested in natural meadows located in the mountains of León (north-west Spain), and characterised by a diverse botanical composition and different stages of maturity of the plants, were used to evaluate the ability of chemical composition and near infrared (NIR) spectroscopy to predict in vitro digestibility and in sacco degradability of the neutral detergent fibre (NDF) fraction. In vitro digestibility was performed as described by the Goering and Van Soest procedure. Three dry Holstein-Friesian cows fitted with a rumen cannula were used to incubate the herbage samples. A Bran+Luebbe InfraAlyzer 500 spectrophotometer was used to obtain the NIR spectra corresponding to the 62 original herbage samples. Prediction equations for the estimation of in vitro digestibility and in sacco degradability parameters of the NDF fraction were generated using NIR spectra or chemical data as independent variables. The results showed that the in vitro digestibility and kinetic parameters of degradation of the NDF fraction could not be predicted accurately, probably as a consequence of the errors corresponding to the reference methods. In contrast, these errors did not greatly affect the extent of disappearance of the NDF fraction at later times, so the accuracy of prediction of these parameters was higher, especially when NIR spectra were used as independent variables. This is probably due to the close relationship that the parameters showed with the chemical data, since this kind of information, together with some physical characteristics of the samples, is included in the NIR spectra.

In sacco dry matter and nitrogen degradation and their relationship with in vitro dry matter digestibility of Napier grass (Pennisetum purpureum Schumach.) as influenced by height of plant at cutting

2002 ◽  
Vol 53 (1) ◽  
pp. 7 ◽  
Author(s):  
Tessema Zewdu ◽  
Robert Baars ◽  
Alemu Yami ◽  
Dawit Negassa
Keyword(s):  
Dry Matter ◽  
Block Design ◽  
Factorial Experiment ◽  
Napier Grass ◽  
Pennisetum Purpureum ◽  
Dry Matter Digestibility ◽  
Bacterial Inoculum ◽  
And Storage ◽  
In Sacco

In vitro dry matter digestibility (IVDMD) as well as in sacco rumen dry matter degradability (DMD) and nitrogen degradability (ND) studies of Napier grass (Pennisetum purpureum) were carried out using a 3 3 factorial experiment arranged in a randomised complete block design with 3 replications. The treatments were 3 levels of nitrogen (N) fertiliser (0, 46, bacterium Synergistes jonesii is known to degrade these compounds and inoculation of the bacterium into the rumen protects cattle against mimosine and DHP toxicity. We report on the development, production, and storage of an in vitro, fermentor-based, mixed bacterial inoculum, which includes S. jonesii, for administration to cattle. This technique may be applicable to the production and delivery of other live, anaerobic, bacterial inocula for use in animal agriculture.

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