Assessment of potato plant development from Minitubers
Laen...
Failid
Kuupäev
2018
Kättesaadav alates
Autorid
Dimante, I.
Gaile, Z.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
In production of minitubers, mani
pulation of their weight by modifying production
method is common. Under field conditions plant development from minitubers can be affected
by their weight, as well as cultivar. This objective of this study was to compare plant development
from four minitu
ber weight classes (MtC) (3 to 4.99
g, 5 to 9.99
g, 10 to 19.99
g, and >
20
g)
with broken apical dominance of cultivars ‘Monta’, ‘Prelma’ and ‘Mandaga’. ‘Prelma’ and
‘Mandaga’ had a similar development pattern, and minitubers >
20
g required significantly
less
growing degree days (GDD) to emerge than minitubers from the lightest classes. The heaviest
minitubers needed on average 176 GDD for 50% emergence and 207 GDD were needed for the
lightest class. The difference in GDD between the marginal MtC was more
pronounced in period
between 50 and 80% emergence. MtC did not affect the final rate of emergence. Number of above
ground stems (1.4
–
4.0) was significantly affected by MtC. ‘Monta’ had significantly different
development
–
delayed emergence, lower emergen
ce rate, less above ground stems, faster canopy
closure. Our study showed that plant development was significantly affected by MtC and cultivar.
Differences between MtC were more pronounced under adverse meteorological condi
tions.
Kirjeldus
Article
Märksõnad
field performance, non-emergence, potato ageing, number of stems, GDD, articles