02350naa a2200217 a 450000100080000000500110000800800410001910000180006024501130007826000090019152017000020065000220190065000230192265300190194570000240196470000260198870000240201470000200203870000230205877300510208120644462023-01-30       2016    bl uuuu     u00u1 u    #d1 aWALLAU, M. O.  aPerformance of Limpograss Breeding Lines under Various Grazing Management Strategies.h[electronic resource]  c2016  aLimpograss [Hemarthria altissima (Poir.) Stapf et C.E. Hubb.] is a C4, perennial, stoloniferous grass that is well adapted to poorly drained soils and grows throughout frost-free periods during winter in southern Florida. Its use has increased rapidly in recent decades, but nearly all area in cultivation is planted with one cultivar, ?Floralta?. A breeding program was initiated to develop improved alternatives to Floralta, resulting in a group of breeding lines requiring evaluation under grazing. The objective of this research was to evaluate the performance of five limpograss breeding lines (1, 4F, 10, 32, and 34) under combinations of grazing frequency and intensity. During the 2012 and 2013 growing seasons, those lines, plus Floralta, were tested at two pre-grazing canopy light interception levels (80 and 95%), that triggered the initiation of each grazing event, and two post-grazing stubble heights (20 and 30 cm). Lines 4F and 10 had greater herbage accumulation, apparent herbage harvested, and persistence than Floralta. Initiation of grazing at 80% canopy light interception resulted in more frequent grazing events, a longer grazing season, shorter pregrazing canopy height, greater leaf percentage, less herbage bulk density, and greater herbage crude protein concentration compared with 95% canopy light interception. These data support cultivar release of breeding lines 4F and 10 and suggest that persistence and efficient utilization of limpograss under rotational stocking can likely be achieved by initiating grazing at a pre-grazing canopy height of ~60 cm, well before 95% canopy light interception, and by ending grazing at a post-grazing canopy height of ~30 cm.  aanimal production  apasture management  aForage farming1 aSOLLENBERGER, L. E.1 aVENDDRAMINI, J. M. B.1 aGOMIDE, C. A. de M.1 aMULLENIX, M. K.1 aQUESENBERRY, K. H.  tCrop Sciencegv. 56, n. 6, p. 3345-3353, 2016.