2021
DOI: 10.1080/00288233.2021.1879175
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The effect of a fodder beet versus rye-grass grazing regime during mid-to-late gestation twin-bearing ewes on dam and progeny performance and lamb survival

Abstract: The objective was to determine the effect of grazing fodder beet versus ryegrass-dominant pasture from mid-to-late gestation on dam and offspring performance under practical farming conditions. Twin-bearing ewes were randomly allocated to grazing regimes of either fodder beet plus ad libitum ryegrass/ clover hay (FB; n = 100) or ryegrass-dominant pasture plus ad libitum ryegrass/clover hay (RG; n = 100) with three replicates per group, from pregnancy day (P) 100-110 to birth. At P135, 10 ewes per treatment wer… Show more

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Cited by 9 publications
(7 citation statements)
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“…Lipid and non-structural carbohydrate (NSC) contents were also measured by NIRS. Pasture samples were analysed for in vitro organic matter digestibility (OMD) and digestible organic matter digestibility (DOMD) according to Roughan and Holland [ 29 , 30 ]. The ME content of pastures was calculated using DOMD (0.163 × DOMD MJ/kg DM) [ 29 , 31 ].…”
Section: Methodsmentioning
confidence: 99%
“…Lipid and non-structural carbohydrate (NSC) contents were also measured by NIRS. Pasture samples were analysed for in vitro organic matter digestibility (OMD) and digestible organic matter digestibility (DOMD) according to Roughan and Holland [ 29 , 30 ]. The ME content of pastures was calculated using DOMD (0.163 × DOMD MJ/kg DM) [ 29 , 31 ].…”
Section: Methodsmentioning
confidence: 99%
“…This study used results from farm practice to quantify the potential impacts of changes in BCS and winter feeding practices on GHG emissions and N and P loss, as well as production of meat and fibre. The additional impact of feeding fodder beet (Hammond et al, 2021) on ewe BCS loss and subsequent lamb loss, and reduced liveweight gain from birth to weaning, caused a significant reduction in whole flock productivity, even when mitigating…”
Section: Discussionmentioning
confidence: 99%
“…This provided comparable lamb mortality rates to those previously published McCoard et al, 2020). Changes in lamb liveweight gain from birth to weaning were calculated from the literature (Stevens et al, 2012;Mathias et al, 2013;Everett-Hincks et al, 2013) Finally, a further adjustment was made to reflect feeding the low protein diet during mid-to-late pregnancy, based on the work of Hammond et al, (2021). Equation 4: Lamb loss (%, low protein diet) = 2* [Equation 4]…”
Section: Impacts Of Body Condition Score On Reproductive Parametersmentioning
confidence: 99%
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“…A key point was learning about the use of animal behaviour as an indicator of adequate feeding, with the ability to maintain body condition during late pregnancy, with related improvements in ewe and lamb survival (Table 6). These improvements may have been related to changing the feed type away from crops during late pregnancy, as this has been linked to lower lamb survival (Hammond et al, 2021). Feeding to appetite has been linked to lower metabolic issues with ewes in late pregnancy, including reducing the incidence of vaginal prolapse (Stevens et al, 2011) The shift to pasture away from winter crop provided a range of rewards (Table 7) such as increased pasture growth in late winter and early spring, reduced costs, a shift in pasture towards more productive and nutritious species and the potential to capture summer surpluses with trading stock.…”
Section: Indicators Outcomesmentioning
confidence: 99%