@conference {40219,
	title = {The sheep{\textquoteright}s immune response to nematode parasites and prospects for its exploitation},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {50},
	year = {1990},
	month = {Jan},
	pages = {229-236},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Perennial ryegrass (RG) and Matua prairie grass swards of low   (LMPG) and high (HMPG) pre-grazing herbage masses were compared in 8   grazing trials (2-3 weeks) during early spring, late spring, summer and   autumn (1987/88 and 1988/89) to assess their feeding values. Pre-   grazing masses were approximately 3000, 4000 and 5500kg DM/ha for RG,   LMPG and HMPG treatments, respectively. Friesian cows (8 per treatment)   were allowed 50 kg DM/cow/d. Mean concentrations of N (\% in OM) and OMD   (\%) for RG, LMPG and HMPG herbage were 2.7, 2.6, 2.3 (s.e.lsm 0.04,   P<0.001); and 74.7, 73.1 and 70.7 (s.e. 0.18, P<0.001), respectively,   HMPG values were lowest during all seasons and were influenced by high   compositions of dead material, low leaf:stem ratios and low compositions   of clover in the swards.     Daily yields of milk and protein on RG swards were 3\% higher (P<0.05)   than LMPG yields, and 11 and 13\% higher (P<0.001), respectively than   those of HMPG swards. Milkfat yields were similar on RG and LMPG   swards, but were 11\% lower (P<0.001) on the HMPG treatment. The results   indicate that leafy prairie grass and leafy ryegrass swards have similar   feeding and productive values. Further research is needed on Matua{\textquoteright}s   persistence under grazing.    },
	issn = {1176-5283},
	author = {Douch PGC}
}
