UNASSIGNED: @entity968 ( @entity970 ) measured with NIRS is known to be a valuable faecal marker when used in indoor experiments. In order to verify whether it can be used at pasture, an experiment was conducted with two trials. In trial 1, six Romane breed adult dry ewes placed in metabolism cages were fed daily with natural, freshly cut rangeland from a fertilised or unfertilised paddock for 6 weeks. Three ewes did not receive @entity970 and the three others were dosed with 10 g of @entity970 in solution form once daily until the end of the experiment to measure in vivo dry matter digestibility and @entity970 recovery rate for each forage quality. At the same time (trial 2), 15 ewe @entity742 and 14 lactating adult ewes suckling one or two @entity742 were allowed to graze together on the same herbage as that cut for indoor ewes. All animals were initially equipped with faecal bags emptied twice daily for collecting total faeces, and eight ewe @entity742 and seven adults were dosed once daily with 10 g of @entity970 . Faecal grab samples were collected for 4 to 5 days for each forage quality grazed. Indoor trial 1 showed that @entity970 had no effect on dry matter intake (DMI) or on digestibility. @entity970 recovery rates measured on fertilised (77.7%) and unfertilised (82.1%) forage were not different (P>0.05). @entity970 recovery rates measured at pasture did not differ (P>0.05) between pasture quality and animal type with an average value of 68.9%. Faecal output measured with bags or estimated with @entity970 and calculated DMI were not different (P>0.05) when @entity970 recovery rate measured at pasture was used. Conversely, using indoor @entity970 recovery values, significantly (P<0.05) or tended to overestimate faecal output. In conclusion, @entity970 could be used as a faecal marker administered at a minimal dose of 1% of DMI with a recovery rate measured under pasture conditions for pasture intake measurements on a group of animals at the same physiological stage but not for individual measurements.

XXXX marker measured with NIRS gives a reliable estimate of the rangeland intake of grazing @entity742 .

@entity742 :: ('9940', 'Species') :: ['lambs'] @entity970 :: ('CHEBI:46793', 'Chemical') :: ['PEG'] @entity968 :: ('MESH:D011092', 'Chemical') :: ['Polyethylene glycol']
@entity968 :: (MESH:D011092,Chemical) :: ['Polyethylene glycol']
