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Growth responses in red deer calves and hinds grazing red clover, chicory or perennial ryegrass/white clover swards during lactation

Published online by Cambridge University Press:  27 March 2009

J. H. Niezen
Affiliation:
Massey University, Palmerston North, New Zealand
T. N. Barry
Affiliation:
Massey University, Palmerston North, New Zealand
J. Hodgson
Affiliation:
Massey University, Palmerston North, New Zealand
P. R. Wilson
Affiliation:
Massey University, Palmerston North, New Zealand
A. M. Ataja
Affiliation:
Massey University, Palmerston North, New Zealand
W. J. Parker
Affiliation:
Massey University, Palmerston North, New Zealand
C. W. Holmes
Affiliation:
Massey University, Palmerston North, New Zealand

Summary

Two experiments were conducted at the Massey University Deer Unit, New Zealand in 1990 and 1991 to evaluate the performance of lactating red deer hinds and their calves grazing conventional perennial ryegrass-based pastures, red clover or chicory. In both experiments, hind and calf performance was evaluated from 1 month post-parturition over a 2½ month summer period to weaning at 3½ months of age.

In Expt 1, hinds and calves were grazed on low (5·4 kg dry matter (DM)/hd/day), medium (10·8) or high (16·4) allowances of red clover, or on a medium allowance of a conventional ryegrass/white clover sward (9·9 DM/hd/day). In Expt 2, hinds and calves grazed equal DM allowances (12 kg DM/hd/day) of perennial ryegrass/white clover, chicory or red clover.

Red clover generally had higher organic matter digestibility (OMD) and higher total N than ryegrass/white clover, and when grazed at equal DM allowances, promoted higher voluntary food intake in the hinds, increased calf growth (430 v. 330 g/day) and increased hind liveweight change. Although decreasing the red clover allowance in Expt 1 slightly but non-significantly decreased hind voluntary food intake and decreased both calf and hind liveweight change, all low red clover values were still consistently higher than all ryegrass/white clover values (P < 0·05). In Expt 2, chicory was of higher OMD and ash content than red clover but N content was lower and similar to ryegrass/white clover. Chicory promoted lower levels of calf liveweight change than red clover but higher than ryegrass/white clover. Hind liveweight change on chicory was lower than on red clover and was similar to ryegrass/white clover. It was concluded that red clover offers potential as a special purpose forage for deer production and that further experimental work is needed with chicory.

Type
Animals
Copyright
Copyright © Cambridge University Press 1993

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