کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2453919 | 1110359 | 2012 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
CASE STUDY: Effect of pen change on milk yield by dairy cows in 2 commercial herds
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The objective of this experiment was to determine the effect of pen change on daily milk yield by dairy cows over the first 10 d after changing pens. The study was conducted during the fall/winter months of 2010/2011 in 2 Wisconsin dairy herds. Study cows were randomly assigned to either treatment (M) or control (NM). On d 0, the M cows were switched between study pens, whereas NM cows remained in their original pen throughout the study. Daily milk weights for M and NM were analyzed for 10 d before d 0 and 10 d after d 0 using PROC MIXED of SAS with parity, treatment, day, and treatment à day interaction as fixed effects and cow within treatment as a random effect. For herd A, n = 154 and 152 for M and NM, respectively. Herd A least squares means for average daily milk yield were 32.0 and 32.4 kg/d per cow for M and NM, respectively. For herd B, n = 137 and 142 for M and NM, respectively. Herd B least squares means for average daily milk yield were 49.3 and 49.4 kg/d per cow for M and NM, respectively. The least squares means for M and NM groups did not differ by least significant difference test for any day within a herd. Moving groups of animals between pens did not have deleterious effects on milk yield.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Professional Animal Scientist - Volume 28, Issue 5, October 2012, Pages 569-572
Journal: The Professional Animal Scientist - Volume 28, Issue 5, October 2012, Pages 569-572
نویسندگان
A. Zwald, R.D. PAS,