@conference {41511,
	title = {Milk production and grazing behaviour during early lactation of three strains of Holstein-Friesian dairy cows managed in different feeding systems},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {64},
	year = {2004},
	month = {Jan},
	pages = {232-236},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	address = {Hamilton},
	abstract = {The objective of this work was to compare individual intake and grazing behaviour of different strains of Holstein-Friesian dairy cows. Strains tested were high breeding worth 1990{\textquoteright}s Holstein-Friesian of overseas (OS90) or NZ origin (NZ90), and a 1970 NZ strain of Friesian (NZ70), farmed under different feeding systems defined by feed allowance per cow per year. Feed allowance ranged from 4.5 to 7.0 t DM cow-1 year-1, based on different stocking rates and supplement inputs. Each system (one strain at one total annual allowance) was managed using a common set of decision rules and all the strains were in similar body condition score (BCS) at calving. Milksolids production, liveweight and BCS were measured routinely, and during September 2002 (55-75 days in milk) daily DMI and digestibility (DMD) were estimated for each cow by the n-alkane method. Grazing behaviour was observed visually.
Daily milksolids yield (per cow and per 100 kg LW) were similar for NZ90 and OS90, which were higher than NZ70 (p<0.01). At the start of the season OS90 cows were heavier (p<0.05) than cows of the other two strains and NZ90 cows heavier (p<0.05) than NZ70 cows, however they were similar in BCS. During September OS90 cows were just slightly heavier than the other two strains (p=0.16), but with lower BCS (p<0.01). Between the start of the season and September, LW and BCS decreases for OS90 cows were significantly higher (p<0.05) than for cows in the other two strains. Slightly higher DMI (per cow and per 100 kg LW) were recorded for the NZ90{\textquoteright}s than for NZ70 and OS90. Grazing time, ruminating time or biting rate was similar across strains. These results suggest that the OS90 was not able to eat sufficient pasture and used more body energy reserves to produce similar MS yield as NZ90. },
	issn = {1176-5283},
	author = {Rossi JL and MacDonald KA and Thorrold B and Holmes CW and Matthew C and Hodgson J}
}
@conference {40837,
	title = {bST: An assessment of potential response for pasture based dairy farms in New Zealand},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {56},
	year = {1996},
	month = {Jan},
	pages = {289-291},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Potential response of lactating dairy cows to bovine somatotropin  (bST) was estimated ex ante for 12 geographically distinct pastoral regions  of New Zealand. The estimation process was as follows. First, seasonal  pasture growth data were collected or, where such data were unavailable,  seasonal pasture growth was estimated from published climate data using  the GROW model. The UDDER model was then used to generate, from the  pasture growth information and average regional stocking rate, seasonal  pasture mass profiles for an },
	issn = {1176-5283},
	author = {Ekanayake PMB and Matthew C and Bailey WC}
}
@conference {40568,
	title = {Effect of contrasting spring grazing management on summer-autumn pasture and milk production of mixed ryegrass-clover dairy swards.},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {54},
	year = {1994},
	month = {Jan},
	pages = {79-82},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Research at Massey University has shown that a spring grazing  
management laxer than the conventional intensive grazing allowing some 
early ryegrass seedhead development before close grazing at anthesis 
("Late Control") may result in improved summer-autumn pasture production.   
Comparisons between conventional and late control spring grazing  
managements for dairy cows were carried out, on a paddock scale, during  
1992/93.  Late control swards showed enhanced dry matter production before  
(24.5\% increase - P<0.05) and after (32.0\% increase - P<0.10) the control  
grazing in early December.  Concomitant measurements of animal performance  
revealed that the increased pasture production during the summer-autumn  
period could be effectively converted into milk by dairy cows, and resulted 
in an increase in milk-solids production of about 10\% per cow (P<0.10).  The  
implications of these results to dairy management systems are discussed in 
the context of pasture responses to spring management and alternative  
conservation strategies. 
 },
	issn = {1176-5283},
	author = {Da Silva SC and Hodgson J and Matthews PNP and Matthew C and Holmes CW}
}
@conference {40461,
	title = {Pasture protein and soluble carbohydrate levels in spring dairy pasture and associations with cow performance},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {53},
	year = {1993},
	month = {Jan},
	pages = {83-86},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {A survey on the East Coast of the North Island was conducted to provide information on the on-farm performance of drought tolerant pastures, including perceptions on animal toxicity problems. During October- December 1990 over 250 paddocks on 102 sheep/beef farms in Gisborne (23, Hawkes Bay (32) and the Wairarapa (47) were surveyed. Botanical composition was measured for each survey paddock from turf cores. No animal health problems were reported for prairie grass pastures, but farmers commented on improved animal performance from this pasture type. Animal health problems mentioned by farmers surveyed were: (1) ryegrass staggers, being reported for 58\% of survey farms and 9\% of survey paddocks.  Ryegrass staggers was usually mentioned for paddocks with a high perennial ryegrass content (>40\% cores containing ryegrass). It was mentioned less frequently for mixed ryegrass- cocksfoot swards (>40\% ryegrass, >10\% cocksfoot) than for swards containing similar levels of ryegrass but little cocksfoot. (2) Bloat was mentioned more frequently for paddocks sown with tall fescue (15\%) than for other pasture types (3\%). Tall fescue swards had a higher clover content than ryegrass swards. (3) Stock ill-thrift (low growth rate) was mentioned for 6 of the 260 survey paddocks. The common feature of these paddocks was a moderate to high cocksfoot content (21- 72\% cores containing cocksfoot). (4) Phalaris toxicity was mentioned by 18\% of farmers who had phalaris pastures.},
	issn = {1176-5283},
	author = {Moller S and Matthew C and Wilson GF}
}
