Model Prediction of Nutrient Supply to Ruminants from Processed Field Tick Beans

DOI QR코드

DOI QR Code

Yu, P.;Christensen, D.A.

  • 투고 : 2004.01.29
  • 심사 : 2004.07.07
  • 발행 : 2004.12.01

초록

The objective of this study was to compare the Dutch DVE/OEB system and the NRC-2001 model in the prediction of supply of protein to dairy cows from processed field tick beans. Comparisons were made in terms of 1) ruminally synthesized microbial CP, 2) truly absorbed protein in the small intestine, and 3) degraded protein balance. The results showed that the predicted values from the DVE/OEB system and the NRC-2001 model had significant correlations with high R (>0.90) values. However, using the DVE/OEB system, the overall average microbial protein supply based on available energy was 16% higher and the truly absorbed protein in the small intestine was 9% higher than that predicted by the NRC-2001 model. The difference was also found in the prediction of the degraded protein balances (DPB), which was 5% lower than that predicted based on data from the NRC-2001 model. These differences are due to considerably different factors used in calculations in the two models, although both are based on similar principles. It need to mention that this comparison was based on the limited data, the full comparison involving various types of concentrate feeds will be investigated in the future.

키워드

Field Tick Bean;NRC-2001 Model;DVE/OEB System;Feed Processing;Protein Evaluation;Ruminants

참고문헌

  1. Yu, P. 1999. Improvement and Evaluation of Nutrients Utilization in Legume Seeds by Dry Roasting in Ruminants. Thesis, University of Melbourne, Australia.
  2. Yu, P., D. A. Christensen and J. J. McKinnon. 2003. Comparison of the National Research Council-2001 Model with the Dutch System (DVE/OEB) in the Prediction of Nutrient Supply to Dairy Cows from Forages. J. Dairy Science. 86:2178-2192.
  3. Yu, P., J. O. Goelema, B. J. Leury, S. Tamminga and A. R. Egan. 2002. An Analysis of the Nutritive Value of Heat Processed Legume Seeds for Animal Production Using the DVE/OEB model: A Review. Anim. Feed Sci. Technol. 99:141-176.
  4. Tamminga, S., W. M. Van Straalen, A. P. J. Subnel, R. G. M. Meijer, A. Steg, C. J. G. Wever and M. C. Block. 1994. The Dutch Protein Evaluation System: the DVE/OEB-system. Livestock Prod. Sci. 40:139-155.
  5. NRC. 2001. Nutrient requirement of dairy cattle. $7^{th}$ rev. ed. National Research Council, Washington, DC: National Academy Press.
  6. Weiss, W. P., H. R. Conrad and N. R. S. Pierre. 1992. A theoretically-based model for predicting total digestible nutrient values of forages and concentrates. Anim. Feed Sci. Technol. 39:95-110.
  7. SAS. 1991. SAS/STAT User's Guide (Release 6). SAS Inst. Inc., Cary, NC.
  8. Yu, P., J. O. Goelema and S. Tamminga. 1999. Influence of pressure toasting on starch ruminal degradative kinetics and fermentation characteristics and genatilization of horse bean in lactating dairy cows. Asian-Aust. J. Anim. Sci. 12:537-543.
  9. Egan, A. R., K. Koda and K. Barady. 1985. Regulation of N metabolism and recycling. In: Control of digestion and metabolism in ruminants. Pages 146-153 in Proc.$6^{th}$ International Symposium on Ruminant Physiology. Butterworths, Londdon.
  10. Verite, R. and Y. Geay. 1987. Evaluation and implementation of the PDI system in France. Pages 249-261 in Feed valuation and protein requirement systems for ruminants. (Ed. R. Jarrige and G. Aldeirman). ECSC-EEC-EAEC. Brussels.
  11. NRC. 1996. Nutrient Requirement of Beef cattle ($7^{th}$ Ed). National Research Council, Washington, DC, National Academy Press.
  12. CVB. Centraal Veevoeder Bureau. 1996. Voorlopig protocol voor in sacco pensincubatie voor het meten van eiwitbestendigheid, 14 November.