Íslenskar landbúnaðarrannsóknir - 01.09.1975, Qupperneq 55

SÁBTÍMI GRASFRÆS 5 3
ÞAKKARORÐ
Höfundur þakkar Magnúsj Oskarssyni til-
raunastjóra mikilsverða aðstoð. Einnig er
skylt að þakka dr. Olafi Dýrmundssyni og
Bjarna Guðmundssyni góð ráð og leiðbein-
ingar, Hólmgeiri Björnssyni og Jóni Viðari
Jónmundssyni tölfræðilega úrvinnslu og
SUMMARY
Sowing dates of grass seed.
JÓNATAN HERMANNSSON
The Agricultmal College,
Hvanneyri, lceland.
The report presents results of two experi-
ments of different sowing dates of a grass
seed mixmre during the years 1970—1974.
The experiments were located at Hvanneyri
Experimental Station (64° 34'N, 21° 40'W),
on reclaimed peat soil.
In both experiments six sowing dates at
monthly intervals were compared the first
sowing date being lOth of May and the last
one 25th of Oktober. The difference in hay
yield (85 % DM) between sowing dates was
higly significant (0,01 > P > 0,001), in the
Hauki Júlíussyni teikningu mynda. Starfs-
fólk tilraunastöðvarinnar á Hvanneyri á og
þakkir skildar. Skólastjóra Bændaskólans á
Hvanneyri er þökkuð aðstaða, sem hann
hefur í té látið.
first and in the second year, but did not exist
in the third year after sowing. Sowing in
autumn and late summer resulted in reduced
yield in the first two years, particularly the
September sowing. Definite conclusions can-
not be drawn from the results due to varia-
tion in the period of time, which passed from
the sowing to the harvesting of respective
experimental plots. In the third year all six
sowing dates had proauced satisfactory hay-
fields. It is concluded that under Icelandic
condition, where rotational cropping is
generally not practiced, a range of sowing
dates (from spring to autumn) may be suc-
cessfully applied. However it appears that
sowing between 15 August and 1 October
may not be advisable.