Evaluation of international Energy- and of Protein Rating Systems Print E-mail
 In the context of the scientific activity "Evaluation of international energy- and protein rating systems" the influence of different sample preparations (fresh, freezing, freezingdry, drying) resp. preservation forms (fresh, silage, hay) are analyzed on their content of the nutrient parliamentary groups of the Cornell-System at meadow fodder and silo-corn. The data can be used as basis of the CNCPS under Austrian feeding conditions.




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The Cornell Net Carbohydrate and Protein System (CNCPS) differentiates between four coal hydrate and five protein parliamentary groups. Basis for the allocation to the parliamentary groups forms the dismantling speed of the nutrients in the pansen (SNIFFEN et. al. 1992, FOX et al. 2000).

From the dismantling speed (kd) and the passage rate (kp) the digestibleness of the nutrient parliamentary groups can be calculated, whereby from the sum of the parliamentary groups the total digestibleness results, which is also in the CNCPS basis of the energy evaluation.

         Digested quantity = fodder quantity x (kd /(kd  + kp))

Several analyses show that the conservation (green fodder, silage, hay) exerts an influence on the portions of the nutrient parliamentary groups (particularly of rapidly soluble parts) (ABDALLA et al. 1988, KOHN & ALL 1992, MATTHE et al. 1999). Therefore is to be assumed that also the drying procedure in the course of sample preparation for milling and analzing the portion of the nutrient parliamentary groups affects resp. to a shift of the relations leads and further falsifies also the calculation of the digestibleness. This means that the analysis of the CNCPS nutrient-parliamentary-groups of green fodder and silage must take place in to blow or freezingdried condition.

In the context of the scientific activity "Evaluation of international energy- and protein rating systems" the influence of different sample preparations (fresh, freezing, freezingdry, drying) resp. preservation forms (fresh, silage, hay) are analyzed on their content of the nutrient parliamentary groups of the Cornell-System at meadow fodder and silo-corn. The data can be used as basis of the CNCPS under Austrian feeding conditions.

In this project the fodder value of meadow fodder as a function of the location, frequency of use (2 -, 3 and 4-cut use) and fertilization level are analyzed, whereby a very broad range of basic fodder quality is present. At silo corn three vegetation stages (milk-ripe, center paste-ripe, end paste-ripe) aof three sorty (FAOS 230, 260, 300) on 3 locations (Gumpenstein, Kobenz, Gleisdorf) are foreseen, in order to achieve a broad fodder value spectrum.

Problem of the analyses is, in which extent different sample preparations (fresh, freezing, freezingdry, drying) or preservation forms (fresh, Silage, hay) have an effect on the content of the nutrient parliamentary groups of the Cornell-System at meadow fodder and silo corn.

At meadow fodder 27 samples per method araise (n = 243), at silo corn also 27 samples per method (n = 216).

Meadow fodder: (2 + 3 + 4) buildups × 3 locations × 9 conserving/sample preparations = 243

Silo corn: 3 sorts × 3 Veg.stages × 3 locations × 8 conserving/sample preparations = 216

Bewertung internationaler Energie- und Proteinbewertungssysteme

2001 - 2003

Univ.-Doz. Dr. Leonhard Gruber
Nutztierforschung

 

Univ.-Doz. Dr. Leonhard Gruber Univ.-Doz. Dr. Leonhard Gruber
Nutztierforschung
DI Marcus Urdl DI Marcus Urdl
Tierernährung

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Energieschätzformeln für Gras- und Maisprodukte (GfE 2008) Energieschätzformeln für Gras- und Maisprodukte (GfE 2008)
Fütterungsreferententagung 2009, LK Burgenland, Großpetersdorf
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Filedate: October 02 2009 06:30:04.
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