| Autor: |
H.B. Morrison |
| Rok vydání: |
1951 |
| Předmět: |
|
| Zdroj: |
Journal of Dairy Science. 34:623-625 |
| ISSN: |
0022-0302 |
| DOI: |
10.3168/jds.s0022-0302(51)91756-0 |
| Popis: |
Summary The effect of estrus on weight of dairy heifers in 241 instances among 203 heifers is reported. Loss in weight on day of estrus as compared with the previous day was approximately 3 per cent of the weight on the day of estrus. Correlation between pounds lost and size of heifer was highly significant. It is suggested that when 1-day weights are used with dairy heifers as experimental animals, 3 per cent of their weight should be added as a correction factor if they are in heat on weigh day. The occurrence of estrus in dairy heifers results in a loss in weight and when single-day weights are used may be corrected by the addition of 3 per cent of their actual weight on the day in heat. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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