The effects of allowance of deferred herbage and concentrate supplementation when offered to ewe lambs, and system of allocation when offered to ewes in late gestation, on animal performance

Autor:	J. P. Hanrahan, T. W. J. Keady
Rok vydání:	2010
Předmět:	Animal science Late gestation Birth weight Grazing Domestic sheep reproduction Weaning Allowance (money) Management Monitoring Policy and Law Biology Agronomy and Crop Science Late pregnancy Weaning weight
Zdroj:	Grass and Forage Science. 65:227-236
ISSN:	1365-2494 0142-5242
Popis:	The effects of allowance of extended (deferred) grazed herbage (AEGH) and herbage allocation management (HAM) were studied in ewe lambs (248) and late-gestation ewes (152), respectively, on commercial farms in south-east Ireland in 2005–06. In Experiment 1, which consisted of four treatments, the effects of AEGH (0·75, 1·25 and 1·75 kg DM per head daily) and concentrate supplementation (0·5 kg per head daily with the 0·75 kg DM herbage allowance) on lamb performance during the extended grazing (16 December to 3 March) and subsequent grazing (4 March to 11 August) seasons were evaluated. Increasing AEGH increased herbage intake linearly (P 0·05) subsequent lamb birth or weaning weights. It is concluded that increasing AEGH to ewe lambs increased liveweight gain during extended grazing and resulted in heavier animals in mid August of the subsequent grazing season. For ewe lambs each 1 kg concentrate DM had the same feed value as 2·4 kg DM AEGH. Use of a leader–follower system for ewes in late pregnancy did not alter lamb birth weight or subsequent performance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6ebc016b03539138b2f037e90eefc457 https://doi.org/10.1111/j.1365-2494.2010.00741.x Zobrazit plný text záznamu Plný text ve formátu PDF