New Zealand Journal of Agricultural Research abstracts
Effects of grazing frequency on the production, nutritive value, herbage
utilisation, and structure of a Paspalum dilatatum sward
A. T. AYALA TORALES
G. L. ACOSTA
V. A. DEREGIBUS
P. M. MOAURO
Cátedra de Forrajicultura
Facultad de Agronomía
Universidad de Buenos Aires
(1417) Avenida San Martín 4453
Capital Federal, República Argentina
Abstract This experiment evaluated the effects of two grazing
frequencies on net herbage accumulation, herbage nutritive value, sward
structure, and herbage utilisation of a paspalum (Paspalum dilatatum)
sward. The sward was grazed intermittently by dry Holstein cows over a 12-month
period, in the Pampean Region in Argentina. Two grazing frequencies were used
in spring and summer, Frequent (<5% of the tillers at inflorescence
emergence) and Less Frequent (>75% of the tillers at inflorescence
emergence). There were no differences (P > 0.05) in net herbage
accumulation between grazing frequencies. The higher proportion of green leaves
(P < 0.05) present in the residual herbage mass of the frequently
grazed sward possibly counterbalanced the shorter rest periods employed.
Frequently grazed paspalum plants showed a more prostrate herbage distribution
and higher net losses of green herbage (P < 0.05) as a consequence of
their lower herbage utilisation (P < 0.05).
Keywords Paspalum dilatatum; nutritive value; grazing
frequency; herbage utilisation; sward structure
New Zealand Journal of Agricultural Research, 2000, Vol. 43: 467-472
0028-8233/00/4304-0467 $7.00/0 (c) The Royal Society of New Zealand
2000
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