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Effect of Azotobacter salinestris on soil microbiological parameters and cucumber yield in integrated and organic farming systems Cover

Effect of Azotobacter salinestris on soil microbiological parameters and cucumber yield in integrated and organic farming systems

Open Access
|Jul 2025

Figures & Tables

Table 1.

The number of Azotobacter spp. and Pseudomonas spp. in soil in the integrated and organic production of cucumber.

TreatmentI termII termIII term
integratedorganicintegratedorganicintegratedorganic
Azotobacter spp. (cfu × 105/g)
Full nitrogen fertilization0.45 a1.1 a7.2 b5.6 a5.7 b3.2 a
1/2 nitrogen fertilization0.75 a1.6 a13.1 a4.5 a14.5 a0.5 b
Rhizosum N plus + 1/2 nitrogen fertilization0.68 a0.6 a10.4 b9.2 a3.0 b1.6 b
Pseudomonas spp. (cfu × 103/g)
Full nitrogen fertilization13.3 a29.3 a1.3 a7.0 b8.7 b21.4 a
1/2 nitrogen fertilization7.3 a8.0 b1.7 a14.8 ab10.9 b20.2 a
Rhizosum N plus + 1/2 nitrogen fertilization12.0 a5.3 b0.2 b30.4 a29.8 a28.8 a

[i] Values marked with the same letters in each column within each group of microorganisms are not significantly different according to Tukey test, P < 0.05.

Table 2.

The number of Azotobacter spp. on the cucumber leaves in integrated and organic production.

TreatmentI termII termIII term
integratedorganicintegratedorganicintegratedorganic
Azotobacter spp. (cfu × 102/g)
Full nitrogen fertilization5.3 b16.7 b5.0 b6.0 b23.7 b15.1 a
1/2 nitrogen fertilization5.3 b16.7 b3.6 b60.9 a37.6 b35.0 a
Rhizosum N plus + 1/2 nitrogen fertilization17.5 a22.4 a45.9 a10.4 b95.2 a34.9 a

[i] Values marked with the same letters in each column are not significantly different according to Tukey test, P < 0.05.

Table 3.

Dehydrogenases activity in the soil [μmol TPF/g d.m. of soil] in the integrated and organic production of cucumber (means ± SE).

TreatmentI termII termIII term
integratedorganicintegratedorganicintegratedorganic
Full nitrogen fertilization15.2 ± 7.7317.6 ± 4.4111.2 ± 0.7518.0 ± 2.727.8 ± 0.214.7 ± 2.03
1/2 nitrogen fertilization14.8 ± 3.8416.9 ± 10.5226.9 ± 2.3920.2 ± 3.977.4 ± 1.576.0 ± 1.41
Rhizosum N plus + 1/2 nitrogen fertilization13.4 ± 4.2917.3 ± 6.0621.7 ± 2.8724.1 ± 4.147.7 ± 0.504.8 ± 0.70

[i] The data in each column are not significantly different according to Tukey test, P < 0.05.

Table 4.

Indices of microbial metabolic potential – Shannon (H′) and biodiversity AWCD in soil in the integrated and organic production of cucumber (means ± SE).

TreatmentI termII term
integratedorganicintegratedorganicintegratedorganicintegratedorganic
H′AWCDH′AWCD
Full nitrogen fertilization1.30 ± 0.792.82 ± 0.130.07 ± 0.090.78 ± 0.152.67 ± 0.192.79 ± 0.200.61 ± 0.180.74 ± 0.17
1/2 nitrogen fertilization2.35 ± 0.362.81 ± 0.100.31 ± 0.160.86 ± 0.112.63 ± 0.332.91 ± 0.100.57 ± 0.210.94 ± 0.11
Rhizosum N plus + 1/2 nitrogen fertilization1.62 ± 0.722.90 ± 0.080.25 ± 0.220.96 ± 0.092.60 ± 0.242.92 ± 0.090.52 ± 0.200.84 ± 0.12

[i] The data in each column are not significantly different according to Tukey test, P < 0.05.

Figure 1.

Cucumber yield harvesting in 15 terms in the integrated cultivation.

Values marked with the same letters in each term are not significantly different according to Duncan test, P < 0.05.

Figure 2.

Total cucumber yield and yield fractions in the integrated cultivation.

Values marked with the same letters in each fraction are not significantly different according to Duncan test, P < 0.05.

Figure 3.

Cucumber yield harvesting in 13 terms in the organic cultivation.

Values marked with the same letters in each term are not significantly different according to Duncan test, P < 0.05.

Figure 4.

Total cucumber yield and yield fractions in the organic cultivation.

Values marked with the same letters in each fraction are not significantly different according to Duncan test, P < 0.05.

DOI: https://doi.org/10.2478/cag-2025-0004 | Journal eISSN: 3071-740X (formerly 2956-9494) | Journal ISSN: 2081-2787
Language: English
Page range: 38 - 45
Submitted on: Dec 9, 2024
Accepted on: Mar 6, 2025
Published on: Jul 1, 2025
Published by: Institute of Soil Science and Plant Cultivation
In partnership with: Paradigm Publishing Services
Publication frequency: Volume open

© 2025 Beata Kowalska, Magdalena Szczech, Anna Gałązka, Krzysztof Zachaj, published by Institute of Soil Science and Plant Cultivation
This work is licensed under the Creative Commons Attribution 4.0 License.