@conference {40824,
	title = {Effect of nitrogen fertiliser and supplements on pasture production and milksolids yield from dairy farm systems},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {56},
	year = {1996},
	month = {Jan},
	pages = {236-238},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Seven farmlets of 6.48 ha grazed by Friesian cows at stocking rates of  either 3.24 or 4.48 cows/ha were used to evaluate the effect of high rates of  nitrogen fertiliser (N) and rolled maize grain on milksolids (MS) production.  Annual applications of 213 and 379 kg N/ha increased annual net herbage  accumulation by 3350 and 4650 kg DM/ha respectively. At 3.24 cows/ha  extra DM resulted in a three fold increase in pasture conservation, providing  silage for use in late lactation, and increasing production by 72 kg MS/cow.  The extra pasture reduced the amount of supplement required at 4.48  cows/ha. Offering supplementary feed when cows were over grazing or  being under fed resulted in an extra 43g milkfat and 47g milk protein/kg  DM at the low stocking rate and 45g milkfat and 36g milk protein/kg DM at  the high stocking rate. Responses to extra feed were greatest when used to  extend lactation. Increased stocking rates will be necessary to maintain  pasture utilisation when large amounts of extra feed are introduced. },
	issn = {1176-5283},
	author = {Penno JW and Bryant AM and MacDonald KA}
}
