01964nam a2200313 a 450000100080000000500110000800800410001902400210006010000210008124501210010226001700022330000370039349000420043052008920047265000140136465000110137865000130138965300150140265300260141765300340144365300270147770000220150470000170152670000190154370000150156270000210157770000260159870000260162420053902015-01-14       2014    bl uuuu     u00u1 u    #d7 a201433690542DOI1 aPONTES, L. da S.  aInteractive N supply and cutting intensity effect on canopy height at 95% light interception.h[electronic resource]  aIn: GENERAL MEETING OF THE EUROPEAN GRASSLAND FEDERATION, 25., 2014, Aberystwyth, Wales. EGF at 50: the future of European grasslands: proceedings. Zurich: EGFc2014  ap. 353-355.cDisponível online.  a(Grassland science in Europe, v. 19).  aThe aim of this study was to evaluate the impact of pasture management practices on leaf canopy height (LCH) at 95% light interception (LI), since this is a valuable strategy of defoliation frequency. These relationships were investigated over two years with monocultures grown in a fully factorial block design crossing six C4 pasture grass species, two cutting intensities and two N levels. We found variations on LCH at 95% LI, mainly across seasons, but also between treatments. The range of these variations was species-dependent. Therefore, in order to maintain a target IL level, grassland managers should cut or graze at different heights according to the species and seasons. N fertilization and an increase in cutting height above ground level can provide a sward structure that allows lower pre-cutting/grazing height and, consequently, shorter intervals between defoliations.  aGramínea  aManejo  aPastagem  aC4 grasses  aDefoliation frequency  aFreqüência de desfolhação  aResponse to management1 aBALDISSERA, T. C.1 aBARRO, R. S.1 aGIOSTRI, A. F.1 aSTAFIN, G.1 aSANTOS, B. R. C.1 aPORFIRIO-DA-SILVA, V.1 aCARVALHO, P. C. de F.