New Zealand Journal of Agricultural Research abstracts
Herbage accumulation, tiller population density, and sward components of
prairie grass under different nitrogen levels
O. SCHENEITER
P. RIMIERI
Generación y Evaluación de Cultivares
Forrajeros
INTA EEA Pergamino
CC 31 (2700) Pergamino
Prov. Bs.As., República Argentina
e-mail: perforr@pergamino.inta.gov.ar
Abstract Two trials were performed to study the effect of
nitrogen fertilisation on prairie grass (Bromus catharticus) sward
characteristics, and to compare the agronomic performance of this species with
that of Italian ryegrass (Lolium multiflorum). Both trials were carried
out in the Humid Pampa in Argentina. In both trials, annual herbage
accumulation depicted a linear model with increasing nitrogen levels. Increases
in tiller population densities due to nitrogen fertilisation were more evident
in late winter. Tiller categories and sward components were relatively
unaffected by nitrogen fertilisation. Until mid spring, prairie grass and
Italian ryegrass accumulated similar total herbage masses, but Italian ryegrass
exhibited earlier growth than prairie grass and the latter was superior from
late spring onwards. Dry matter digestibility was higher in Italian ryegrass
than in prairie grass from early to mid spring. It was concluded that prairie
grass could be a complementary annual crop in the Humid Pampa in Argentina.
Keywords prairie grass; Italian ryegrass; nitrogen; herbage
accumulation; tiller population density; sward components
New Zealand Journal of Agricultural Research, 2001, Vol. 44: 13-22
0028-8233/01/4401-0013 $7.00/0 (c) The Royal Society of New Zealand
2001
PDF file of entire paper: medium quality (812K); (scanned from paper original: notes about this process)
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