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• W2108069969 abstract "Abstract The technique of grazing cut sods was used in combination with sound and video recording to examine the feasibility of using small-scale depletion curves derived from stall trials to estimate forage intake of cattle at the pasture. Setaria lutescens sods were grazed for a variable number of bites to generate patch depletion curves. Depletion curves characterize forage intake as a function of the number of bites taken at a single feeding station. Thus, the method agrees with a hierarchical approach to foraging and it could be used as a basis for scaling up food intake measurements to larger spatial scales. Two sod experiments were carried out, with the second experiment as a validation for predictions of intake. A field experiment was carried out to validate the predictions from the sod experiments with respect to both the amount and the rate of intake. Bite weight was largely determined by initial sward height and depletion level. Cumulative dry matter intake from the sods was well described by a rectangular hyperbola including the variables of number of bites and sward height. Bulk density added little to the explained variation, but was an important factor to account for the dry matter intake on short, dense sods from the second experiment. Feeding time could be explained to a great extent by the number of bites and chews taken, both in the sod and in the field experiments. However, the animals were substantially faster when grazing in the field than on the sods due to a relatively smaller chewing effort. The estimate of bite weight in the field based on the sod depletion curves was validated by an independent estimate derived from the chew to bite ratio. Bite weight estimates that ignored feeding station depletion were significantly greater than the independent estimates. We conclude that the sod grazing technique is an adequate tool to investigate food intake and forage depletion by grazing. It shows promise as a tool to explicitly scale up of foraging behaviour from the level of the feeding station to that of larger patches." @default.
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• W2108069969 date "1998-11-01" @default.
• W2108069969 modified "2023-09-25" @default.
• W2108069969 title "From feeding station to patch: scaling up food intake measurements in grazing cattle" @default.
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• W2108069969 doi "https://doi.org/10.1016/s0168-1591(98)00158-0" @default.
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