Abstract:
In the years 2006 and 2007 the reaction of the cultivars (created at
ARDS of Suceava) at two fertilizer levels (75 N + 75 P2O5 + 75 K2O and 150
N + 120 P2O5 + 120 K2O) and three density types of the planted tubers (45,
55 and 65 thousand/ha) were tested. In both years the meteorological
conditions were less favorable for potato crop.
In comparison with cultivar Loial the registered yields at the Victoria
cultivar, were bigger with 22 – 46 q/ha, and at the Claudiu cultivar were
bigger with 28 – 57q/ha. Also, the rated capacity of one active substance unit
(used like fertilizer) at the other tested cultivars was bigger with three Kg in
comparison with Loial cultivar.
Majority of the chemical fertilizer quantities from75 N + 75 P2O5 +
75 K2O to 150 N + 120 P2O5 + 120 K2O Kg/ha contributed to the grows of
the rated capacity with 7 kg at the Victoria cultivar and with 9 kg at the
Claudiu cultivar (in comparison with Loial cultivar when the fertilizer level
was minimum).
Concerning the reaction of the cultivars to the increase of the planted
tubers density resulted that the Victoria and Claudiu cultivars realized the
biggest yields at the density on 65 thousand plants/ha, while the Loial
cultivars manifested a reduced tolerance at this density, the biggest yields at
the density 55 thousand tubers/ha were obtained.
The synthesis of the experimental results emphasizes that the biggest
yields were obtained when we cultivated the Claudiu cultivar on the agro
found with the biggest fertilizer quantities. In the meteorological conditions
of the years 2006 and 20007 the role of the tubers density was less
significant.
