sodininkystė ir daržininkystė 25(4)

Soil management consisted of frequently mowed grass in the alleyways and
herbicide strips 1-m wide along the tree rows. The experiment was carried out on a
loamy sand soil high in organic matter and with good fertility. The trees were irrigated
with trickle irrigation when water deficits, based on evapotranspiration measurements,
were recorded. The trees each received the same amounts of fertilizer, based
on soil and leaf analysis.
Fruit thinning was done by hand whenever necessary with the aim of spacing
the fruitlets to about 5 cm apart. Trunk circumference, 25 cm above the graft union,
was recorded each fall. Total yield was measured yearly. Individual fruit weights
were determined on random samples of 50 fruits per plot. Samples of 10 fruits were
taken to the laboratory for determination of soluble solids by an Atago digital refractometer
at 20°C.
The statistical analyses were carried out using the software Minitab.
Results. Growth and Flowering. In the first growing season the trees had
minor shoot growth due to some root drying during the transport. However, in the
second growing season (1995) the trees grew normally. The amounts of flower
clusters were registered by giving scores to each cultivar/rootstock combination in
the third leaf and the following three years (Tables 1 and 2).
Table 1. Effect of five rootstocks on the amount of flower clusters during the first four
cropping years of ‘Opal’. Scores 1–9, where 1 – zero flower clusters and 9 – many
1 lentelë. Slyvø veislës ‘Opal’ þiedynø skaièiaus priklausomumas nuo penkiø poskiepiø
per pirmuosius ketverius derëjimo metus (1–9 balai, kur 1 – nëra þiedynø,
9 – daug þiedynø)
Rootstock
Poskiepis
Flower index, scores
Þiedø rodiklis balais
1996 1997 1998 1999
Ferlenain 2.8 3.5 7.0 4.5
Ferciana 3.9 1.9 6.1 3.3
Fereley 5.5 1.8 6.8 1.9
P 8–13 4.6 1.8 7.1 3.0
St. Julien A 2.3 1.4 5.7 2.8
LSD / P = 0.05% NS NS NS NS
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