Alfalfa protein concentrate as a less ruminally degradable protein source for high-producing dairy cows
Other Title(s)
استخدام مركز بروتين البرسيم كمصدر للبروتين بطئ التحلل في الكرش لتغذية أبقار الحليب ذات الإدرار العالي
Joint Authors
Source
Journal for Scientific Resarch
Issue
Vol. 1, Issue 2 (30 Sep. 1997), pp.31-35, 5 p.
Publisher
Sultan Qaboos University College of Agricultural and Marine Sciences
Publication Date
1997-09-30
Country of Publication
Oman
No. of Pages
5
Main Subjects
Topics
Abstract EN
Ten multiparous Holstein gh-pro،^cing dairy cows.
Dairy cows؛(SBM) and alfalfa protein concentrate (APC) as supplemental protein sources for h with an average milk production of 35.2 kg/day were paired and randomly assigned to one of the treatments.
A double 21 reversal design was employed with 35 days per period.
The comparison between treatments was made during the last days of each period.
Experimental diets, containing 60% corn silage and 10 % alfalfa hay, were formulated to be soenergetic (crude protein, 15.6%; net energy for lactation, 1.60 Mcal/kg DM).
Fifty percent of؛ nd،؛ isonitrogenous dietary nitrogen was provided by test proteins.
Animals were fed four times daily.
Chromic oxide boluses, 50 g/day were used to estimate digestion coefficients.
Ruminai protein degradability in vivo (%) and in situ (%) were 56.8, 68.3 and 47.3, 35.3 for SBM and A?c, respectively.
Dry matter intake (kg/day) was 19.1 and 18.6 for cows fed SBM and APC, 6.2 respectively.
Rumina) parameters of cows fed SBM vs APC were: pH, 6.6 vs 6.7; ammonia nitrogen (mg/di), 10.8 vs P < 0.01); total volatile fatty acids (mM), 86.3 vs 84.6 (P < 0.05); acetate (%), 50.8 vs 64.9 (P < 0.01); propionate) (%), 24.8 vs 19.6 (P < 0.01); butyrate (%), 10.7 vs 11.5.
Digestion coefficients (%) in cows fed SBM vs APC were: dry matter, 65.3 vs 61.8; crude protein, 67.6 vs 61.1 (P < 0.05); neutral detergent fiber, 51.1 V.V 52.5; acid detergent ± 28.2 fiber, 47.7 vs 49.0.
A slightly higher (P> 0.05) amount of milk was produced by cows fed APC (28.6 ± 3.5 vs 3.8 kg/day).
Each additional gram of undegradable intake protein provided by APC contributed to a 5-gram increase in .4 % fat-corrected milk production
American Psychological Association (APA)
Lu, C. D.& Jorgensen, N. A.. 1997. Alfalfa protein concentrate as a less ruminally degradable protein source for high-producing dairy cows. Journal for Scientific Resarch،Vol. 1, no. 2, pp.31-35.
https://search.emarefa.net/detail/BIM-629428
Modern Language Association (MLA)
Lu, C. D.& Jorgensen, N. A.. Alfalfa protein concentrate as a less ruminally degradable protein source for high-producing dairy cows. Journal for Scientific Resarch Vol. 1, no. 2 (Sep. 1997), pp.31-35.
https://search.emarefa.net/detail/BIM-629428
American Medical Association (AMA)
Lu, C. D.& Jorgensen, N. A.. Alfalfa protein concentrate as a less ruminally degradable protein source for high-producing dairy cows. Journal for Scientific Resarch. 1997. Vol. 1, no. 2, pp.31-35.
https://search.emarefa.net/detail/BIM-629428
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 34-35
Record ID
BIM-629428