@conference {41003,
	title = {The effect of secondary compounds of birdsfoot trefoil and red clover on dairy cow grazing preferences},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {58},
	year = {1998},
	month = {Jan},
	pages = {110-112},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The responses of grazing animals to specific plant secondary compounds were examined in trials in which dairy cows grazed spaced plants of either birdsfoot trefoil (Lotus corniculatus L.) with high and low concentration of extractable condensed tannins (2.54 and 0.62 \% in the DM respectively for high and low tannin genotypes), or red clover (Trifolium pratense L.) with high and low formononetin concentration (0.68 and 0.29 \% in the DM respectively for high and low formononetin genotypes). Plants were established in 4 linear sequences of 26, each providing three blocks (replicates) of balanced sets of 2 plant species, 2 concentrations of test components, and plants either not trimmed or trimmed to minimise physical differences between genotypes within species. The sequences were grazed by four trained cows and selective behaviour was determined by the number of grazing bites per plant. Observations were repeated in March (P1) and April (P2). On average, animals grazed more on non-trimmed than on trimmed plants (7.6 vs 3.1 {\textpm} 0.711 bites/plant in P1, P=0.0001; and 8.4 vs 3.6 {\textpm} 0.858 bites/plant in P2, P=0.0002), but did not show clear discrimination between red clover and lotus (6.3 vs 4.4 {\textpm} 0.711 bites/plant in P1, P=0.053; and 6.3 vs 5.7 {\textpm} 0.858 bites/plant in P2, P=0.620). However, though the distribution of bites between red clover plants with high and low formononetin was similar (7.2 vs 5.5 {\textpm} 0.76 bites/plant in P1, P= 0.130; and 7.3 vs 5.3 {\textpm} 1.08 bites/plant in P2, P= 0.191), they showed strong preference for low condensed tannin concentration in lotus ( 2.1 vs 6.6 {\textpm} 1.11 bites/plant in P1, P= 0.0068; and 3.9 vs 11.1 {\textpm} 1.35 bites/plant in P2, P= 0.069). },
	issn = {1176-5283},
	author = {Poli CHEC and Hodgson J and Arnold GC and Cosgrove GP}
}
@conference {40795,
	title = {The use of a novel approach to determine the influence of sward characteristics on the discriminatory grazing behaviour of dairy cows},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {56},
	year = {1996},
	month = {Jan},
	pages = {122-124},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Dairy cows were offered choices of patches of vegetation (0.8m2) on a  perennial ryegrass (Lolium perenne L.) sward providing combinations of  five levels of sward height (8.9 - 19.6 cm) and three levels of herbage bulk  density (1.3 - 1.6 mg DM/cm3) in linear sequence. Four cows were used,  each of which grazed two out of a balanced set of eight sequences, each  sequence being replicated three times in a set of 27 patches in linear  sequence. Animal responses were monitored in terms of grazing time and  number of bites per patch. Bite number per patch increased from zero to 54 (SEM },
	issn = {1176-5283},
	author = {Griffiths WM and Hodgson J and Holmes CW and Arnold GC}
}
