Feed quality restriction and compensatory growth in growing sheep: modelling changes in body dimensions
| Autor: | A. Kamalzadeh, J. van Bruchem, W.J Koops |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1998 |
| Předmět: |
Dierlijke Productiesystemen
medicine.medical_specialty Sheep General Veterinary Straw Biology Crossbreed Animal Production Systems Feed quality Growth model Endocrinology Animal science Internal medicine medicine WIAS Body dimensions Animal Science and Zoology Compensatory growth (organism) Dry matter Growing sheep Allometry Compensatory growth Wageningen University Texel |
| Zdroj: | Livestock Production Science 53 (1998) Livestock Production Science, 53, 57-67 |
| ISSN: | 0301-6226 |
| DOI: | 10.1016/s0301-6226(97)00136-x |
| Popis: | Fifty six crossbred Swifter (Texel ♂×Flemish ♀) male lambs, born in March 1993 and weaned at age ≈2 months, were used to quantify effects of feed quality restriction with respect to growth rates of weight and dimensions of the body. The ration was gradually changed to the experimental control diet of grass straw (51 g crude protein kg−1 dry matter (DM)) ad libitum and 35 g kg−0.75 d−1 mixed concentrates (173 g crude protein kg−1 DM). At the age of approximately 3 months, the animals were randomly divided into a restricted (R) and a control (C) group. Group R was subjected to feed quality restriction by withholding concentrates from 3 to 6 months of age. In the remaining 6 months, the R group received the same feed as the C group. A modified model for allometric growth was developed to quantify effects of feed quality restriction and consequent compensation after realimentation on growth. Estimates of parameters clearly indicated retardation in growth after restriction and compensatory growth after realimentation. In general, skeletal measures such as ulna length, body height and length, and chest depth were less affected than measures related to muscle and fat deposition, such as width and girth measurements, and body weight. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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