Fjölrit RALA - 15.12.2000, Blaðsíða 24

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Table 19. Dry matter yield (kg/ha) of each variety and location and at three different harvest dates (the first, the
third and the fifth), average of all experiment years.
lst yield measurement
Kollafjorður Upernaviarsuk Narsarsuaq Korpa Average
2 years 1-2 years 2 years 1-2 years All years
Lavang 2.0 8.2 3.0 5.3 (1 year) 4.5
Fylking 2.0 2.6 (1 year) 1.3 2.0 (1 year) 1.9
Seida 4.0 14.0 (1 year) 3.2 14.4 8.2
Vega 1.9 11.2 3.4 9.7 6.6
Engmo 2.4 10.0 2.6 8.7 5.9
Average 2.5 9.2 2.7 8.0
3rd yield measurement
Kollafjorður Upernaviarsuk Narsarsuaq Korpa Average
2 years 1-2 years 2 years 1 -2 years All years
Lavang 22.5 20.0 21.5 27.3 (1 year) 22.2
Fylking 21.7 15.2 (1 year) 15.4 20.8 (1 year) 18.4
Seida 24.8 34.9 (1 year) 23.5 41.5 30.6
Vega 21.9 30.4 31.8 39.8 31.0
Engmo 21.9 31.8 30.9 42.4 31.8
Average 22.6 26.5 24.6 34.4
Sth yield measurement (harvest machine)
Kollafjorður Upernaviarsuk Narsarsuaq Korpa*’ Average
3 years 2-3 years 3 years 2-3 years All years
Lavang 46.2 41.5 (2 years) 32.0 53.2 (2 years) 42.3
Fylking 57.2 35.6 (2 years) 30.1 53.7 (2 years) 44.1
Seida 49.7 47.8 (2 years) 34.9 49.4 45.2
Vega 71.2 89.3 62.3 74.9 73.6
Engmo 73.2 76.1 63.2 77.1 71.8
Average 59.5 58.1 43.3 61.7
*’ In 1998 yield from 30.6 is used.
Growth and weather. Among factors known to affect the growth rate of plants are
temperature, radiation and precipitation. Radiation data were only available from Iceland. The
experiments were carried out under widely different soil conditions. It is therefore difficult to
isolate the effects of weather parameters on growth. However, these data were used to
estimate the effect of temperature and precipitation on growth rate. This was done using the
following model: