@conference {40829,
	title = {Microbial protein synthesis and milk production in cows offered pasture diets differing in non-structural carbohydrate content},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {56},
	year = {1996},
	month = {Jan},
	pages = {255-259},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The effect on ruminal fermentation and milk production of increasing  the proportion of non-structural carbohydrate (NSC) in a pasture diet was  investigated in early (Trial 1) and late (Trial 2) lactation. Twenty four cows  in Trial 1 and 15 cows in Trial 2 were offered pasture (P), 85\% P plus 15\%  protein/NSC mixture (PR), and P+10\% (Trial 1) or P+15\% (Trial 2) NSC  (PE) in a latin square design. All diets were isonitrogenous and P and PR  were isoenergetic. PE but not PR increased microbial protein synthesis and  decreased rumen ammonia and milk urea levels compared to P in both trials.  In Trial 1, neither PE nor PR increased milk yield or milk solids output  compared to P. Nitrogen but not dry matter digestibility was reduced on PR  and PE compared to P. Ruminal degradation of casein, but not of pasture,  was increased on PR and PE compared to P. In Trial 2 the milk yields of  cows offered PE and PR were greater than those offered P, and greater on  PE than PR. Increasing the ratio of carbohydrate to protein was more  effective in improving nitrogen utilisation in the rumen than was increasing  the proportion of NSC.},
	issn = {1176-5283},
	author = {Carruthers VR and Neil PG and Dalley DE}
}
