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אסיף מאגר המחקר החקלאי
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Effects of recombinant bovine somatotropin under conditions of high production and heat stress.
Year:
1993
Source of publication :
Journal of Dairy Science
Authors :
Weller, Joel Ira
;
.
Volume :
76
Co-Authors:
Lotan, E., Israel Cattle Breeders Association, Tel Aviv.
Sturman, H., Israel Cattle Breeders Association, Tel Aviv.
Weller, J.I., Israel Cattle Breeders Association, Tel Aviv.
Ezra, E., Israel Cattle Breeders Association, Tel Aviv.
Facilitators :
From page:
1394
To page:
1402
(
Total pages:
9
)
Abstract:
The effect of bST injection on milk production of Israeli Holsteins was tested under conditions of mean production > 9000 kg/yr and climatic stress; mean maximum and minimum summer temperatures are 38 and 25 degrees C, respectively, in the Jordan Valley, located 200 m below sea level. In 1989, 111 cows were injected, and 115 cows were recorded as controls. In 1990, 108 cows were injected, and 93 cows were included as controls. Fifty-nine of the cows injected in 1990 were also injected in 1989. Production records were corrected for parity, calving month, days to first injection, and days in milk. Injection with bST increased total lactation milk production by 12%, fat production by 15%, and protein production by 13%. Injection also resulted in slight increases in fat and protein percentages. Daily milk production during the injection period was increased by 4.4 kg. Injection during the previous lactation slightly decreased production of cows injected during the following lactation. Advancing the commencement of injection from the 4th to the 2nd mo in milk did not affect total lactation production. Weight gains and dry matter intake were higher for injected cows, but body condition score was higher for the control group. Injection had no discernible effect on fertility variables.
Note:
Related Files :
Animal
article
biosynthesis
cattle
drug effect
Female
lactation
lipid
Lipids
Protein
proteins
Support, Non-U.S. Gov't
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More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
19278
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:27
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Scientific Publication
Effects of recombinant bovine somatotropin under conditions of high production and heat stress.
76
Lotan, E., Israel Cattle Breeders Association, Tel Aviv.
Sturman, H., Israel Cattle Breeders Association, Tel Aviv.
Weller, J.I., Israel Cattle Breeders Association, Tel Aviv.
Ezra, E., Israel Cattle Breeders Association, Tel Aviv.
Effects of recombinant bovine somatotropin under conditions of high production and heat stress.
The effect of bST injection on milk production of Israeli Holsteins was tested under conditions of mean production > 9000 kg/yr and climatic stress; mean maximum and minimum summer temperatures are 38 and 25 degrees C, respectively, in the Jordan Valley, located 200 m below sea level. In 1989, 111 cows were injected, and 115 cows were recorded as controls. In 1990, 108 cows were injected, and 93 cows were included as controls. Fifty-nine of the cows injected in 1990 were also injected in 1989. Production records were corrected for parity, calving month, days to first injection, and days in milk. Injection with bST increased total lactation milk production by 12%, fat production by 15%, and protein production by 13%. Injection also resulted in slight increases in fat and protein percentages. Daily milk production during the injection period was increased by 4.4 kg. Injection during the previous lactation slightly decreased production of cows injected during the following lactation. Advancing the commencement of injection from the 4th to the 2nd mo in milk did not affect total lactation production. Weight gains and dry matter intake were higher for injected cows, but body condition score was higher for the control group. Injection had no discernible effect on fertility variables.
Scientific Publication
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