Íslenskar landbúnaðarrannsóknir - 01.03.1977, Page 70

68 ÍSLENZKAR LANDBÚNAÐARRANNSÓKNIR
was 1,53 and 1,56 lambs per ewe in groups
A and B, respectively, the difference being
insignificant (P>0,05). The differences be-
tween groups within years were small and
ewes in group A had a higher mean lambing
rate in one year only (Table 1). Mean ewe
body weights, after mating was completed
in January, were 58,41 and 57,66 kg for
the ewes in groups A and B, respectively,
the difference being insignifictnt (P>0,05,
Table 2). Weight changes from weaning in
HEIMILDARIT.
Coop, I. E., 1966: Effea of flushing on reproduc-
tive performance of ewes. J. agric. Sci., Camb.,
67: 305—323.
Edey, T. N., 196'6: Nutritional stress and pre-im-
plantation emhryonic mortality in Merino sheep.
J. agric. Sci., Camb., 67: 287—293.
Edey, T. N., 1970: Nutritional stress and pre-
implantation mortality in Marino sheep (1964
—7). General discussion and conclusions.
J. agric. Sci., Camb., 74'- 199—204.
Gunn, R. G., Doney, J. M., og Russel, A. J. F.,
1969: Fertility in Scottish Blackface ewes as
influenced by nutrition and body condition at
mating.
J. agric. Sci., Camb., 73: 289—294.
late September until January indicated that
the mangement and feeding of ewes in both
groups, both prior to and during mating,
was relatively good by Icelandic standards.
It appears that under such conditions there
is no advantage gained by continuing flushing
after the ewe has been mated a ration slightly
above maintenance being sufficent. The a-
bove conclusions are in a general agreement
with common practice on some farms in
Iceland.
Gunn, R. G., Doney, J. M., og Russel, A. J. F.
1972: Embryo mortality in Scottish Blackface
ewes as influenced by body condition at mating
and by post-mating nutrition.
J. agric. Sci., Camb., 79: 19—25.
Nedkvitne, J. J., 1975: Fóring av sauen i fram-
tida. Nord. Jordbruksforskning, 57: 645—653.
Beretning om NJF 15. kongress i Reykjavik
1975.
Pálsson, Halldór, 1967: Supplementation of grass-
land products in sheep feeding in „Grassland in
sheep and goat production".
EAAP Report No. 2: 22—39.