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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Lactation and body weight of dairy cows: Interrelationships among heat stress, calving season and milk yield
Year:
2000
Authors :
ברש, חנינא
;
.
מלץ, אפרים
;
.
סילניקוב, ניסים
;
.
שמאי, אבי
;
.
Volume :
9
Co-Authors:
Maltz, E., Inst. of Agricultural Engineering, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50 250, Israel
Kroll, O.
Barash, H., Institute of Animal Science, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50 250, Israel
Shamy, A., Institute of Animal Science, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50 250, Israel
Silanikove, N., Institute of Animal Science, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50 250, Israel
Facilitators :
From page:
33
To page:
45
(
Total pages:
13
)
Abstract:
How the interactions among heat stress, calving season and milk yield (MY) affects lactation and body weight (BW) curves was studied by analyzing the daily records of MY and BW of dairy cows. The summer calving cows (SC) attained minimal BW sooner than winter calving cows (WC), the differences between high yielding (HY; MY≥40 1/d) SC and WC being greater than differences between low yielding (LY; MY<40 1/d). The minimal BW was lower in all SC than in WC and this could be related to the differences between the HY cows. MY peak was higher in all WC than in all SC, similar in LY cows among the two treatments, and higher in HY WC than in HY SC. The 4.4% differences in MY during the first 40 wk postpartum between all WC (8960 1) and all SC (8568) could be related to 8.0% differences between HY WC (10444 1) and HY SC (9604 1). During the summer peak MY occurred later than during the winter irrespective of the production level. We have shown that heat stress during early lactation affects the entire lactation and BW curves in dairy cows, and that heat stress negatively interacts with MY.
Note:
Related Files :
Calving season
Dairy cows
heat stress
milk yield
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
22342
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:51
Scientific Publication
Lactation and body weight of dairy cows: Interrelationships among heat stress, calving season and milk yield
9
Maltz, E., Inst. of Agricultural Engineering, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50 250, Israel
Kroll, O.
Barash, H., Institute of Animal Science, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50 250, Israel
Shamy, A., Institute of Animal Science, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50 250, Israel
Silanikove, N., Institute of Animal Science, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50 250, Israel
Lactation and body weight of dairy cows: Interrelationships among heat stress, calving season and milk yield
How the interactions among heat stress, calving season and milk yield (MY) affects lactation and body weight (BW) curves was studied by analyzing the daily records of MY and BW of dairy cows. The summer calving cows (SC) attained minimal BW sooner than winter calving cows (WC), the differences between high yielding (HY; MY≥40 1/d) SC and WC being greater than differences between low yielding (LY; MY<40 1/d). The minimal BW was lower in all SC than in WC and this could be related to the differences between the HY cows. MY peak was higher in all WC than in all SC, similar in LY cows among the two treatments, and higher in HY WC than in HY SC. The 4.4% differences in MY during the first 40 wk postpartum between all WC (8960 1) and all SC (8568) could be related to 8.0% differences between HY WC (10444 1) and HY SC (9604 1). During the summer peak MY occurred later than during the winter irrespective of the production level. We have shown that heat stress during early lactation affects the entire lactation and BW curves in dairy cows, and that heat stress negatively interacts with MY.
Scientific Publication
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