Sheep producers could significantly increase lamb weaning percentages from autumn-joined ewes by having them graze lucerne during joining. This new research finding from MLA is in contrast with the traditional belief that diets high in protein or nitrogen and energy could lead to embryo mortality. Researcher Dr Susan Robertson, of the Graham Centre for Agricultural Innovation, Wagga Wagga, NSW, said the study was prompted by industry concern regarding the potential fertility impact of grazing of ewes on lucerne prior to joining. “We have been advocating for flushing with lucerne as it is cheaper than feeding lupins and it appears to have a better, more consistent response but we wanted to confirm these results and whether grazing lucerne throughout joining would have an impact on embryo mortality, “ Susan said.
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