Publication Date
1997
Description
Near infra red spectrometry (NIRS) is commonly used to characterise animal feeds at the level of their intrinsic composition (dry matter, protein, fat, fiber) as well of their digestibility (Dardenne et al.,1991). The use of new systems in the evaluation of the protein value has induced the necessity to determine parameters such as the theoretical ruminal degradability of nitrogen (DT).
The definition of this criterion necessitates the implementation of the nylon bag technique which is time consuming and costly and is reserved to reference laboratories. An alternative to this technique, based on an enzymatic hydrolysis of the proteinic content, has been developed by Aufrère et al.( 1988) whose work has lead to define a relationship between the theoretical degradability measured in sacco (DT) and the enzymatic degradability of proteins (DE) for compound feeds. Resuming their work, Kamoun (1995) has adapted the methodology to forage substrates and determined for the former a same relationship. The study presents for forage substrates a predictive model of the enzymatic degradability of nitrogen by Near Infra Red Spectrometry, based on 69 samples of wilted grass silage analysed by the reference method. Characteristics of this model are SE 2.24, R2 0.74.
Citation
Agneeseens, R; Dardenne, P; and Lecomte, Ph, "Use of NIR to Estimate Nitrogen Degradability of Forage" (2024). IGC Proceedings (1993-2023). 7.
https://uknowledge.uky.edu/igc/1997/session17/7
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Use of NIR to Estimate Nitrogen Degradability of Forage
Near infra red spectrometry (NIRS) is commonly used to characterise animal feeds at the level of their intrinsic composition (dry matter, protein, fat, fiber) as well of their digestibility (Dardenne et al.,1991). The use of new systems in the evaluation of the protein value has induced the necessity to determine parameters such as the theoretical ruminal degradability of nitrogen (DT).
The definition of this criterion necessitates the implementation of the nylon bag technique which is time consuming and costly and is reserved to reference laboratories. An alternative to this technique, based on an enzymatic hydrolysis of the proteinic content, has been developed by Aufrère et al.( 1988) whose work has lead to define a relationship between the theoretical degradability measured in sacco (DT) and the enzymatic degradability of proteins (DE) for compound feeds. Resuming their work, Kamoun (1995) has adapted the methodology to forage substrates and determined for the former a same relationship. The study presents for forage substrates a predictive model of the enzymatic degradability of nitrogen by Near Infra Red Spectrometry, based on 69 samples of wilted grass silage analysed by the reference method. Characteristics of this model are SE 2.24, R2 0.74.
