Articles
Effect of nitrogen and phosphorus fertilization on growth components, yield and tuber quality characteristics of two potato cultivars grown under organic production system
Article number
1242_27
Pages
191 – 198
Language
English
Abstract
The effect of two levels of nitrogen (Ν1=1.3 and N2=2.0 g Ν plant‑1) and two levels of phosphorus (P1=3.1 and P2=5.2 g P2O5 plant‑1) on the growth, yield and tuber quality of two potato cultivars (Voyager, Spunta), grown during spring season at Kalamata, Greece was studied.
Seed tubers were planted in 11-L pots containing a mixture 1:1 (v/v) of peat (pH=6, no additional inorganic nutrient elements) and perlite.
In all plants the same amount of PatentKali (0-0-30 + 10% MgO + 42% SO3) was applied (6.6 g K2O and 1.3 g MgO plant‑1). In order to meet the fertilization treatments, the organic fertilizers Biosol (7-0.5-0.3), Phosphorite (0-27-0) and Acadian 1-1-16 were used.
In both cultivars, the higher N-dose increased the fresh weight of leaves, shoots, tubers, and shoot N-content.
It also increased N-content of tubers when phosphorus was applied at the lower dose.
In both cultivars, the higher P-dose increased the fresh weight of shoots, tubers N-content when nitrogen was applied at the lower dose.
Phosphorus did not affect tuber yield in Spunta, but in Voyager, the higher P-dose increased tuber yield.
In addition, the higher P-dose increased leaf N-content in Voyager when nitrogen was applied at the lower dose.
However, fertilization treatments did not affect dry matter content, P-content and K-content of leaves, shoots and tubers.
We concluded that, in organic farming system, tuber yield is favoured by nitrogen fertilization in both Spunta and Voyager and by phosphorus fertilization in Voyager, however, tuber quality characteristics were not affected by nitrogen or phosphorus fertilization.
Seed tubers were planted in 11-L pots containing a mixture 1:1 (v/v) of peat (pH=6, no additional inorganic nutrient elements) and perlite.
In all plants the same amount of PatentKali (0-0-30 + 10% MgO + 42% SO3) was applied (6.6 g K2O and 1.3 g MgO plant‑1). In order to meet the fertilization treatments, the organic fertilizers Biosol (7-0.5-0.3), Phosphorite (0-27-0) and Acadian 1-1-16 were used.
In both cultivars, the higher N-dose increased the fresh weight of leaves, shoots, tubers, and shoot N-content.
It also increased N-content of tubers when phosphorus was applied at the lower dose.
In both cultivars, the higher P-dose increased the fresh weight of shoots, tubers N-content when nitrogen was applied at the lower dose.
Phosphorus did not affect tuber yield in Spunta, but in Voyager, the higher P-dose increased tuber yield.
In addition, the higher P-dose increased leaf N-content in Voyager when nitrogen was applied at the lower dose.
However, fertilization treatments did not affect dry matter content, P-content and K-content of leaves, shoots and tubers.
We concluded that, in organic farming system, tuber yield is favoured by nitrogen fertilization in both Spunta and Voyager and by phosphorus fertilization in Voyager, however, tuber quality characteristics were not affected by nitrogen or phosphorus fertilization.
Authors
A.A. Alexopoulos, T. Varzakas, S. Karras, A. Koriki, A. Kotsiras, I. Xynias
Keywords
dry matter, Solanum tuberosum, ‘Spunta’, ‘Voyager’
Groups involved
- Commission Banana
- Division Temperate Tree Fruits
- Division Vine and Berry Fruits
- Division Tropical and Subtropical Fruit and Nuts
- Division Ornamental Plants
- Division Vegetables, Roots and Tubers
- Division Horticulture for Development
- Division Plant Genetic Resources, Breeding and Biotechnology
- Commission Cultivar Registration
- Division Plant-Environment Interactions in Field Systems
- Division Postharvest and Quality Assurance
- Division Greenhouse and Indoor Production Horticulture
- Division Landscape and Urban Horticulture
- Division Horticulture for Human Health
- Division Precision Horticulture and Engineering
- Division Temperate Tree Nuts
- Commission Agroecology and Organic Farming Systems
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