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פותח על ידי קלירמאש פתרונות בע"מ -
Lactational response of dairy cows to change of degradability of dietary protein and organic matter.
Year:
1993
Source of publication :
Journal of Dairy Science
Authors :
אהרוני, יואב
;
.
Volume :
76
Co-Authors:
Aharoni, Y., Agricultural Research Organization, Neve-Yaar Experiment Station, Haifa, Israel.
Arieli, A., Agricultural Research Organization, Neve-Yaar Experiment Station, Haifa, Israel.
Tagari, H., Agricultural Research Organization, Neve-Yaar Experiment Station, Haifa, Israel.
Facilitators :
From page:
3514
To page:
3522
(
Total pages:
9
)
Abstract:
The effect of variable degradability of both OM and CP, incorporated at a constant ratio in diets of high yielding dairy cows (35 kg/d), was studied under commercial dairy herd conditions. Two diets containing 17% CP were formulated, including high (70%) and low (65%) protein degradability. The ratio of rumen-degradable OM to degradable protein was adjusted to 5:1 in both diets. Cows were assigned to treatments based on equal milk yield prior to trial, parity, and DIM. The trial lasted 7 wk: a reference week (wk 0), in which both groups were fed the high degradability diet, was followed by 6 experimental wk, in which group 1 was fed the high degradability diet and group 2 the low degradability diet. Cows on the low degradability diet consumed 1.2 kg more DM and yielded 1.5 kg/d more milk, .055 kg/d more milk protein, and .196 kg/d more milk fat. Percentages of milk protein (3.06 and 3.03) were similar, but fat (3.67 and 3.28) was higher for cows fed the low degradability diet. The results suggest that, when diets were formulated to balance rumen degradability of both OM and CP, 65% rather than 70% degradability of CP was advantageous for yields of milk and milk components.
Note:
Related Files :
Animal
biosynthesis
cattle
Female
lactation
lipid
Lipids
metabolism
milk
Rumen
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
29278
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:45
Scientific Publication
Lactational response of dairy cows to change of degradability of dietary protein and organic matter.
76
Aharoni, Y., Agricultural Research Organization, Neve-Yaar Experiment Station, Haifa, Israel.
Arieli, A., Agricultural Research Organization, Neve-Yaar Experiment Station, Haifa, Israel.
Tagari, H., Agricultural Research Organization, Neve-Yaar Experiment Station, Haifa, Israel.
Lactational response of dairy cows to change of degradability of dietary protein and organic matter.
The effect of variable degradability of both OM and CP, incorporated at a constant ratio in diets of high yielding dairy cows (35 kg/d), was studied under commercial dairy herd conditions. Two diets containing 17% CP were formulated, including high (70%) and low (65%) protein degradability. The ratio of rumen-degradable OM to degradable protein was adjusted to 5:1 in both diets. Cows were assigned to treatments based on equal milk yield prior to trial, parity, and DIM. The trial lasted 7 wk: a reference week (wk 0), in which both groups were fed the high degradability diet, was followed by 6 experimental wk, in which group 1 was fed the high degradability diet and group 2 the low degradability diet. Cows on the low degradability diet consumed 1.2 kg more DM and yielded 1.5 kg/d more milk, .055 kg/d more milk protein, and .196 kg/d more milk fat. Percentages of milk protein (3.06 and 3.03) were similar, but fat (3.67 and 3.28) was higher for cows fed the low degradability diet. The results suggest that, when diets were formulated to balance rumen degradability of both OM and CP, 65% rather than 70% degradability of CP was advantageous for yields of milk and milk components.
Scientific Publication
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