The ultrasonic scanning technology has provided farmers with a useful tool to determine potential lambing percentages well in advance of lambing. This paper outlines ways in which this information can be used to effectively target groups of ewes to maximise feeding efficiency. Underfeeding of the ewe flock can be partly alleviated by the early sales of non-pregnant ewes. Understanding the interactions between body condition and feeding in conjunction with scanning can lessen birthing problems through appropriate feeding regimes. Targeted feeding plans can ensure that both protein and energy needs are met for single, twin and triplet bearing ewes. Feed types such as brassicas, silage and grain can be targeted to specific periods throughout the pregnancy for optimal feed use once parity is known.
Proceedings of the New Zealand Society of Animal Production, Volume 59, , 93-94, 1999
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