The effect of ewe size and nutritional regimen beginning in early pregnancy on ewe and lamb performance to weaning

Autor:	S. T. Morris, Paul R. Kenyon, C. M. C. Jenkinson, Elwyn C. Firth, Hugh T. Blair, P. L. Johnston, D. D. S. Mackenzie, S. W. Peterson
Rok vydání:	2009
Předmět:	medicine.medical_specialty Pregnancy Offspring Birth weight Soil Science Plant Science Biology medicine.disease Regimen Animal science Endocrinology Internal medicine medicine Weaning Animal Science and Zoology Flock Animal nutrition Agronomy and Crop Science Body condition
Zdroj:	New Zealand Journal of Agricultural Research. 52:203-212
ISSN:	1175-8775 0028-8233
Popis:	Ewe size, pregnancy nutrition and pregnancy rank are known to affect the productive performance of ewes and their offspring. The aim of the present study was to compare the effects of two nutritional regimens, from day 21 to day 140 of pregnancy, in singleton‐ and twin‐bearing ewes of two different mean weights, taken from a single flock. The study included Large ewes offered Ad lib (Large‐Ad lib, n= 151), Large ewes offered Maintenance (Large‐Maintenance, n = 153), Small ewes offered Ad lib (Small‐Ad lib, n = 155) and Small ewes offered Maintenance (Small‐Maintenance, n = 153) that were either singleton‐ or twin‐bearing. During the period day 21 to day 140 Maintenance and Ad lib feeding regimens included Large and Small ewes and singleton‐ and twin‐bearing ewes. At days 1 and 140 of pregnancy Large ewes were heavier (P < 0.05) and of greater (P < 0.05) body condition than Small ewes. Similarly, at days 1 and 140 of pregnancy twin‐bearing ewes were heavier (P < 0.05) than single‐bearing ewes. At ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a97c7676b6e42f584ec150129eef0f91 https://doi.org/10.1080/00288230909510505 Zobrazit plný text záznamu Plný text ve formátu PDF