Evaluation of a Nutrition Model in Predicting Performance of Vietnamese Cattle
The objective of this study was to evaluate the predictions of dry matter intake (DM) and average daily gain (ADG) of Vietnamese Yellow (Vang) purebred and crossbred (Vang with Red Sindhi or Brahman) bulls fed under Vietnamese conditions using two levels of solution (1 and 2) of the large ruminant n...
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Asian-Australasian Association of Animal Production Societies
2012-09-01
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doaj-4ef68ad156de4892a3057f0f7bc859262020-11-24T21:08:04ZengAsian-Australasian Association of Animal Production SocietiesAsian-Australasian Journal of Animal Sciences1011-23671976-55172012-09-012591237124710.5713/ajas.2012.1203622804Evaluation of a Nutrition Model in Predicting Performance of Vietnamese CattleDavid ParsonsNguyen Huu Van0Aduli E. O. Malau-AduliNguyen Xuan Ba1Le Dinh Phung2Peter A. LaneLe Duc Ngoan3Luis O. Tedeschi4 Faculty of Animal Sciences, Hue University of Agriculture and Forestry, Hue City, .Vietnam Faculty of Animal Sciences, Hue University of Agriculture and Forestry, Hue City, .Vietnam Faculty of Animal Sciences, Hue University of Agriculture and Forestry, Hue City, .Vietnam Faculty of Animal Sciences, Hue University of Agriculture and Forestry, Hue City, .Vietnam Department of Animal Science, Texas A&M University, College Station, TX 77843-2471, .USAThe objective of this study was to evaluate the predictions of dry matter intake (DM) and average daily gain (ADG) of Vietnamese Yellow (Vang) purebred and crossbred (Vang with Red Sindhi or Brahman) bulls fed under Vietnamese conditions using two levels of solution (1 and 2) of the large ruminant nutrition system (LRNS) model. Animal information and feed chemical characterization were obtained from five studies. The initial mean body weight (BW) of the animals was 186, with standard deviation ±33.2 kg. Animals were fed ad libitum commonly available feedstuffs, including cassava powder, corn grain, Napier grass, rice straw and bran, and minerals and vitamins, for 50 to 80 d. Adequacy of the predictions was assessed with the Model Evaluation System using the root of mean square error of prediction (RMSEP), accuracy (Cb), coefficient of determination (r2), and mean bias (MB). When all treatment means were used, both levels of solution predicted DMI similarly with low precision (r2 of 0.389 and 0.45 for level 1 and 2, respectively) and medium accuracy (Cb of 0.827 and 0.859, respectively). The LRNS clearly over-predicted the intake of one study. When this study was removed from the comparison, the precision and accuracy considerably increased for the level 1 solution. Metabolisable protein was limiting ADG for more than 68% of the treatment averages. Both levels differed regarding precision and accuracy. While level 1 solution had the least MB compared with level 2 (0.058 and 0.159 kg/d, respectively), the precision was greater for level 2 than level 1 (0.89 and 0.70, respectively). The accuracy (Cb) was similar between level 1 and level 2 (p = 0.8997; 0.977 and 0.871, respectively). The RMSEP indicated that both levels were on average under- or over-predicted by about 190 g/d, suggesting that even though the accuracy (Cb) was greater for level 1 compared to level 2, both levels are likely to wrongly predict ADG by the same amount. Our analyses indicated that the level 1 solution can predict DMI reasonably well for this type of animal, but it was not entirely clear if animals consumed at their voluntary intake and/or if the roughness of the diet decreased DMI. A deficit of ruminally-undegradable protein and/or a lack of microbial protein may have limited the performance of these animals. Based on these evaluations, the LRNS level 1 solution may be an alternative to predict animal performance when, under specific circumstances, the fractional degradation rates of the carbohydrate and protein fractions are not known.http://www.ajas.info/upload/pdf/25-161.pdfMathematical ModelsPerformanceDry Matter IntakeBeef Cattle) |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
David Parsons Nguyen Huu Van Aduli E. O. Malau-Aduli Nguyen Xuan Ba Le Dinh Phung Peter A. Lane Le Duc Ngoan Luis O. Tedeschi |
spellingShingle |
David Parsons Nguyen Huu Van Aduli E. O. Malau-Aduli Nguyen Xuan Ba Le Dinh Phung Peter A. Lane Le Duc Ngoan Luis O. Tedeschi Evaluation of a Nutrition Model in Predicting Performance of Vietnamese Cattle Asian-Australasian Journal of Animal Sciences Mathematical Models Performance Dry Matter Intake Beef Cattle) |
author_facet |
David Parsons Nguyen Huu Van Aduli E. O. Malau-Aduli Nguyen Xuan Ba Le Dinh Phung Peter A. Lane Le Duc Ngoan Luis O. Tedeschi |
author_sort |
David Parsons |
title |
Evaluation of a Nutrition Model in Predicting Performance of Vietnamese Cattle |
title_short |
Evaluation of a Nutrition Model in Predicting Performance of Vietnamese Cattle |
title_full |
Evaluation of a Nutrition Model in Predicting Performance of Vietnamese Cattle |
title_fullStr |
Evaluation of a Nutrition Model in Predicting Performance of Vietnamese Cattle |
title_full_unstemmed |
Evaluation of a Nutrition Model in Predicting Performance of Vietnamese Cattle |
title_sort |
evaluation of a nutrition model in predicting performance of vietnamese cattle |
publisher |
Asian-Australasian Association of Animal Production Societies |
series |
Asian-Australasian Journal of Animal Sciences |
issn |
1011-2367 1976-5517 |
publishDate |
2012-09-01 |
description |
The objective of this study was to evaluate the predictions of dry matter intake (DM) and average daily gain (ADG) of Vietnamese Yellow (Vang) purebred and crossbred (Vang with Red Sindhi or Brahman) bulls fed under Vietnamese conditions using two levels of solution (1 and 2) of the large ruminant nutrition system (LRNS) model. Animal information and feed chemical characterization were obtained from five studies. The initial mean body weight (BW) of the animals was 186, with standard deviation ±33.2 kg. Animals were fed ad libitum commonly available feedstuffs, including cassava powder, corn grain, Napier grass, rice straw and bran, and minerals and vitamins, for 50 to 80 d. Adequacy of the predictions was assessed with the Model Evaluation System using the root of mean square error of prediction (RMSEP), accuracy (Cb), coefficient of determination (r2), and mean bias (MB). When all treatment means were used, both levels of solution predicted DMI similarly with low precision (r2 of 0.389 and 0.45 for level 1 and 2, respectively) and medium accuracy (Cb of 0.827 and 0.859, respectively). The LRNS clearly over-predicted the intake of one study. When this study was removed from the comparison, the precision and accuracy considerably increased for the level 1 solution. Metabolisable protein was limiting ADG for more than 68% of the treatment averages. Both levels differed regarding precision and accuracy. While level 1 solution had the least MB compared with level 2 (0.058 and 0.159 kg/d, respectively), the precision was greater for level 2 than level 1 (0.89 and 0.70, respectively). The accuracy (Cb) was similar between level 1 and level 2 (p = 0.8997; 0.977 and 0.871, respectively). The RMSEP indicated that both levels were on average under- or over-predicted by about 190 g/d, suggesting that even though the accuracy (Cb) was greater for level 1 compared to level 2, both levels are likely to wrongly predict ADG by the same amount. Our analyses indicated that the level 1 solution can predict DMI reasonably well for this type of animal, but it was not entirely clear if animals consumed at their voluntary intake and/or if the roughness of the diet decreased DMI. A deficit of ruminally-undegradable protein and/or a lack of microbial protein may have limited the performance of these animals. Based on these evaluations, the LRNS level 1 solution may be an alternative to predict animal performance when, under specific circumstances, the fractional degradation rates of the carbohydrate and protein fractions are not known. |
topic |
Mathematical Models Performance Dry Matter Intake Beef Cattle) |
url |
http://www.ajas.info/upload/pdf/25-161.pdf |
work_keys_str_mv |
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