oa Agriprobe - Die waarde van kanolastoppel vir skape

Volume 5, Issue 1
  • ISSN : 1810-9799



The nutritive value of canola (Brassica napus) stubble for grazing South African Mutton Merino (SAMM) ewes in the Mediterranean rainfall area of South Africa was assessed. Ewes were allowed to graze continuously on canola stubble in an area of 11.2 ha during the summer and autumn (19 December to 20 May 1997) for a period of 152 days. The 48 ewes was randomly divided into four groups to pasture on canola stubble at four different stocking densities (respectively 1.5, 3.5, 5 and 7.2 ewes/ha). No supplement was supplied during the experimental period. There was a significant decrease in liveweight of ewes at a stocking density of 5 ewes/ha. While ewes at a stocking density of 1.5 ewes/ha gained weight and those at a stocking density of 3.5 ewes/ha showed the lowest weight loss. Wool production was the highest at 1.5 ewes/ha (P < 0.01). Birth weight of the lambs was not significantly affected by stocking density. Crude protein (CP) and total digestible nutrients (TDN) of hand collected stubble samples decreased significantly with an increase in stocking density. The acid detergent fibre (ADF) and neutral detergent fibre (NDF) content of samples were significantly higher at the higher stocking rate compared to those at the lower stocking density.

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