Abstract

AbstractTwo trials were conducted in the Channel Scablands of eastern Washington, USA, in 2003 and 2004 to determine the effects of lactation and experience on the consumption of lupine (Lupinus leucophyllus) by cattle. Naive cows and those which had grazed lupine-infested rangelands were placed in the pasture (2003). Lactating and non-lactating cows which also had experience in grazing lupine were also placed in the pasture (2004). Although cattle first grazed other forages until they were depleted, there was no difference in lupine consumption in 2003 by both naive and experienced cows. Similarly, there was no difference in lupine consumption between lactating and dry cows in 2004, even though other forage was abundant. In conclusion, there is no evidence that naive or lactating cattle eat more lupine compared to experienced or dry cows.

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