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Chanvit Vajrabukka. Seasonal Influences on the Productive Performance of Horro Cows at Bako, Ethiopia. (). Kasetsart University. Office of the University Library. : , ก.ค-ก.ย. 2548.
Seasonal Influences on the Productive Performance of Horro Cows at Bako, Ethiopia
Name: Kebede, Gizaw
Organization :
Bako Agricultural Research Center
Name: Kanchana Markvichitr
Organization :
Kasetsart University. Faculty of Agriculture. Department of Animal Science
Name: Somkiert Prasanpanich
Organization :
Kasetsart University. Faculty of Agriculture. Department of Animal Science
Name: Chanvit Vajrabukka
Organization :
Kasetsart University. Faculty of Agriculture. Department of Animal Science
keyword:
Horro-cow
;
season
Abstract:
Ten years data of milk production and reproduction from 473 Horro cows at Bako Agricultural Research Center was investigated if there was seasonal variation in milk production and reproductive parameters (days open and services per conception) of Horro cows. Cows grazed on natural pasture for about 7 hours by day and kept in barns at night. Supplementary feeds (hay, silage, concentrate) were provided to cows from 7 months of pregnancy until parturition and only concentrate meal during milking. Multiple regression analysis from SAS was used to investigate the relationship of milk production, days open and services per conception with mean temperature, relative humidity, sunshine hours and wind speed. Stepwise selection procedure was used to examine the different regression equations. Mean temperatures and Temperature Humidity Index remained higher in February to April, after which they declined. Milk yield was affected by daily mean temperature (P<0.001), sunshine hour (P<0.001) and wind speed (P<0.05). The over all mean (±SE) milk yield (kg) of the cows was 402.86±19.31 over a mean lactation length of 185±4.77 days. Production did not vary significantly (P>0.05) among seasons, but was higher for cows calved in the spring and summer. Milk production was found to be significantly (P<0.01) influenced by parity; yields increasing from parity one to parity four where it peaked. Services per conception were significantly (P<0.01) affected by only relative humidity. Significant (P<0.05) differences were observed in days open with the highest days open being in February (224 days). Days open was significantly affected (P<0.001) by daily mean temperature.
Kasetsart University. Office of the University Library
Address:
BANGKOK
Email:
tdckulib@ku.ac.th
Created:
ก.ค-ก.ย. 2548
Modified:
2552-10-07
Issued:
2009-10-07
บทความ/Article
application/pdf
วิทยาสารเกษตรศาสตร์ (สาขาวิทยาศาสตร์), 39(3) หน้า 494-500
eng
©copyrights Kasetsart University
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ใช้เวลา
0.039416 วินาที
Kebede, Gizaw
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|---|---|---|
| Influence of environmental factors on the productivity of indigenous horro cows of Western Ethiopia
มหาวิทยาลัยเกษตรศาสตร์ Kebede, Gizaw | Chanvit Vajrabukka | วิทยานิพนธ์/Thesis |
| Seasonal Influences on the Productive Performance of Horro Cows at Bako, Ethiopia
มหาวิทยาลัยเกษตรศาสตร์ Kebede, Gizaw;Kanchana Markvichitr;Somkiert Prasanpanich;Chanvit Vajrabukka | บทความ/Article | |
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