کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10976088 | 1108038 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Short communication: Added value of rumination time for the prediction of dry matter intake in lactating dairy cows
ترجمه فارسی عنوان
ارتباط کوتاه: ارزش افزوده زمان نابودی برای پیش بینی میزان مصرف ماده خشک در گاوهای شیرده
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کلمات کلیدی
مصرف ماده خشک، گاو شیری، نشخوار پیش بینی مصرف،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
چکیده انگلیسی
The objective of the current study was to quantify the change in the prediction of dry matter intake (DMI) resulting from the inclusion of rumination time (RT) in the 2001 National Research Council (NRC) DMI prediction model. Forty-one Holstein cows fed the same total mixed ration were involved in a 10-wk study. Individual DMI were measured daily. The accuracy and precision of the original NRC prediction model, based on body weight, fat-corrected milk, and week of lactation as independent variables, was compared with the accuracy and precision of the same model with RT as an additional independent variable. The RT estimate was significant in the model developed but had a low value (0.031Â kg/h). Root mean square prediction errors were very similar in the 2 models (1.70 and 1.68Â kg/d) as were the other indicators (R2, linear bias, random error, and concordance correlation coefficient) selected to compare the models in this study. These results indicate no gain in DMI prediction precision or accuracy when RT is included in the NRC model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Dairy Science - Volume 97, Issue 10, October 2014, Pages 6531-6535
Journal: Journal of Dairy Science - Volume 97, Issue 10, October 2014, Pages 6531-6535
نویسندگان
P. Clément, R. Guatteo, L. Delaby, B. Rouillé, A. Chanvallon, J.M. Philipot, N. Bareille,