Agriculture Reference
In-Depth Information
concentration of the remaining DPPH. The results were expressed as the Trolox equivalent
antioxidant capacity (μmol TE /100 g FW). Trolox standard solutions were prepared at a
concentration ranging from 50 to 300 µM.
Statistical Analysis
The data from the 2-year investigation were subjected to the analysis of variance
(ANOVA) using MSTAT-C statistical computer package (Michigan State University, East
Lansing, MI, USA). The Least Significance Difference (LSD) was used to compare the
treatment means and treatments declared different at p = 0.05 level of significance.
R ESULTS
Soil Microbial Counts
The total number of microorganisms and the numbers of fungi, actinomycetes,
Azotobacters and oligonitrophils in the soil are presented in Table 1.
The analysis of variance showed significant effect of fertilizer on the number of fungi,
actinomycetes, Azotobacters and oligonitrophils. A significant effect of the cultivar on the
number of Azotobacter and oligonitrophils was also observed. Compared to different
fertilizers, the highest population of the total number of microorganisms, Azotobacters and
oligonitrophils was recorded in the biofertilizer treatment (125.22 CFU∙10 6 /g d.m. soil, 39.06
CFU∙10 2 /g d.m. soil, 26.78 CFU∙10 5 /g d.m. soil, respectively), whereas the highest fungal and
actinomycetes number was recorded in the chemical application treatment (79.17 and 33.50
CFU∙10 5 /g d.m. soil, respectively). Considering the cultivar influence, the total number of
microorganisms, as well as the number of Azotobacter (129.92 CFU∙10 6 /g d.m. soil and 33.08
CFU∙10 2 /g d.m. soil, respectively) was observed to be the highest in cv 'Dely'. Conversely, a
very high number of fungi, actinomycetes and oligonitrophils was recorded in cv ‗Joly'
(67.92, 28.42 and 29.00 CFU∙10 5 /g d.m. soil, respectively).
Generative Potential and Fruit Quality Traits
Generative Potential
The influence of the fertilizer and cultivar and the effect of their interactions on the
generative potential of 'Clery', 'Joly' and 'Dely' strawberries are presented in T able 2.
The number of fruits and yield per plant were significantly different depending on the
cultivar tested. It was observed that cv 'Clery' ranked the highest regarding the fruit number
and yield per plant (36.2 and 0.78 kg, respectively). In the various fertilizer treatments,
biofertilizer expressed a positive influence on the fruit number per plant (29.8) and
consequently the yield per plant (0.71 kg). Nevertheless, no significant differences between
the two fertilizer types were observed in the obtained results concerning the generative
potential.
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