@conference {41114,
	title = {Amino acid supply to the small intestine of dairy cows fed pasture},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {59},
	year = {1999},
	month = {Jan},
	pages = {180-183},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Two experiments measured the quantity and quality of amino acids available for absorption by four dairy cows fed pasture. Experiment 1 compared a diet of ryegrass/white clover pasture offered ad libitum or at 75\% of ad libitum intake during October. Experiment 2, conducted in December, compared an all-ryegrass diet with a diet comprising 100\% ryegrass, or 50\% ryegrass and 50\% white clover. Treatments were assigned according to a 2x2 crossover design. Restricted feeding (Experiment 1) significantly reduced the total supply of amino acids to the small intestine by 23\% (246 vs. 190g amino acid nitrogen/d). Compared to an all-ryegrass diet, a ryegrass diet which contained 50\% white clover (Experiment 2) significantly increased the total supply of amino acids by 10\% (284 vs. 259g amino acid nitrogen/d). For all four pasture diets, arginine, methionine, and histidine were identified, in that order, as being most limiting, supplying 67, 71, and 77\%, respectively, of the absorbable amino acid requirement. The supply of absorbable lysine from all four pasture diets was found to meet requirements of dairy cows in early to mid lactation. },
	issn = {1176-5283},
	author = {Kolver ES and Carruthers VR and Neil PG and de Veth MJ and Jansen EBL and Phipps DE}
}
