COMPARATIVE STUDY OF BIO- AND CHEMICAL FERTILIZATION IN STRAWBERRY PRODUCTION - Fertilizers: Components, Uses in Agriculture and Environmental Impacts - page 137

Factor

Weight
(g)

Length
(mm)

Width
(mm)

Fruit shape
index

'Clery' 21.60±0.48b 40.15±0.27b 34.79±0.20c 1.15±0.01a

'Joly' 29.46±0.61a 51.19±0.35a 43.62±0.15 a 1.17±0.01a

Cultivar (B)

'Dely' 21.51±0.38b 38.09±0.22c 37.58±0.17b 1.01±0.00b

'Clery'

20.37±0.18a 39.50±0.27a 34.34±0.25a 1.15±0.01a

Biofertilizer 'Joly' 28.27±0.88a 50.85±0.41a 43.40±0.14a 1.17±0.01a

Fertilizer
x
Cultivar
(A x B)

'Dely'

21.37±0.56a 37.93±0.34a 37.26±0.14a 1.02±0.01a

'Clery'

22.83±0.61a 40.80±0.28a 35.25±0.16a 1.16±0.01a

Chemical
fertilizer

'Joly'

30.65±0.55a 51.53±0.56 a 43.85±0.24a 1.18±0.02a

'Dely'

21.65±0.57a 38.25±0.28a 37.90±0.26a 1.01±0.00a

ANOVA

A * * * ns

B * * * *

A x B ns ns ns ns

Means of 2-year values with three replicates ± standard error.
Values within each column followed by the different small letters are significantly different at the
p≤0.05 by LSD test.
ns - non significant differences.

A significant effect of the cultivar on the index of fruit shape was also evident. In general,
morphometric traits were found to be better in the chemical fertilizer treatment (25.04 g,
43.53 mm and 39.00 mm, respectively) except for the index of fruit shape whose values were
identical in both fertilizer treatments (1.11). Among the cultivars tested, 'Joly' exhibited the
highest values of fruit weight, length and width (29.5 g, 51.19 mm and 43.62 mm,
respectively), whereas index of fruit shape was similar to that of cv. 'Clery' corresponding to
long conical shape with values above 1.15.

Chemical Fruit Traits
Individual Phenolic Compounds
Kaempferol was identified from the group of flavonols in all cultivars tested. Its content
was highly affected by the fertilizer and the interaction effects of the fertilizer and cultivar
(Table 4 and Figure 1).
In the different fertilizer treatments, biofertilizer expressed a more positive influence on
the kaempferol content (1.09 mg/100 g FW) than the chemical fertilizer. All cultivars tested
were characterized by a similar kaempferol content, so no statistically significant differences
were observed among cultivars related this compound. Considering the interaction effect of
the fertilizer type and cultivar, the only significant differences observed were those in cv.
'Joly' (Figure 1).