01870nam a2200301 a 450000100080000000500110000800800410001910000150006024501300007526002310020552008490043665000230128565000160130865000220132465000230134665000100136965000140137965000120139365000120140565000250141765000190144265000220146165000100148365300230149370000160151670000200153270000160155215242512023-08-24       2001    bl uuuu     u00u1 u    #d1 aORR, R. J.  aIntake characteristics and performance of contrasting grass varieties continuously stocked with shepp.h[electronic resource]  aIn: INTERNATIONAL GRASSLAND CONGRESS, 19., 2001, São Pedro, SP. Grassland ecosystems: an outlook into the 21st century: proceedings. Brasília, DF: Sociedade Brasileira de Zootecnia; Piracicaba: FEALQ, 2001. p. 529-530.c2001  aFifteen intermediate-heading perennial ryegrass (Lolium perenne) varieties were grazed by sheep under continuous variable stocking management. Mean daily grass dry matter intake per ewe was positively correlated with liveweight gain per ewe (r = 0.63) and per ha (r = 0.58) over an 8-month grazing season. Daily intake was not correlated with grazing time (r = 0.12) but was positively correlated with instantaneous dry matter intake rate (r = 0.75). Breeding varieties with high intake rate characteristics should allow increases in the contribution of grazed grass to grassland-based livestock farming. There is now a need to identify morphological and chemical characteristics of varieties that are correlated with high intake rate and a need to develop tools, which enable these traits to be identified rapidly in grass breeding programmes.  aAnimal performance  aFeed intake  aRange improvement  aRuminant nutrition  aSheep  aVarieties  aAzevém  aConsumo  aGramínea Forrageira  aLolium Perenne  aNutrição Animal  aOvino  aPerformance animal1 aCOOK, J. E.1 aCHAMPION, R. A.1 aROOK, A. J.