Bio-Fertilizers Based on Digestate and Biomass Ash as an Alternative to Commercial Fertilizers-The Case of Tomato

The reutilization of agricultural wastes, as bio-fertilizers, is the key way to close the nutrient cycle and save mineral fertilizers. This hypothesis was verified in three consecutive seasons, treating tomato with three bio-fertilizers on the background of a standard rate of mineral fertilizer. The...

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Veröffentlicht in:Agronomy (Basel) 2021-09, Vol.11 (9), p.1716, Article 1716
Hauptverfasser: Przygocka-Cyna, Katarzyna, Barlog, Przemyslaw, Spizewski, Tomasz, Grzebisz, Witold
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Sprache:eng
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Zusammenfassung:The reutilization of agricultural wastes, as bio-fertilizers, is the key way to close the nutrient cycle and save mineral fertilizers. This hypothesis was verified in three consecutive seasons, treating tomato with three bio-fertilizers on the background of a standard rate of mineral fertilizer. The bio-fertilizers differed in their C:N ratio, which was 13:1, 21:1, and 6:1 for the A, B, and C fertilizers, respectively. They were applied at the rate of 200, 400, 800, and 1600 kg ha(-1). The average fruit yield increased in the order: B < C < A. For the relevant fertilizer, the maximum commercial yield was 91, 87, and 101 t ha(-1), for a respective rate of 1600, 200, and 400 kg ha(-1). The number of fruits (CFN), as the dominant yield component, indirectly reflected the nitrogen (N) supply to plants. A shortage or excess of N on plots treated with the B or C fertilizers, resulted in a decreased CFN, leading to a yield decline. The year-to-year variability in the potassium (K) content reflected fairly well the variable weather conditions, responsible for water management by tomato. The conducted study showed that the tested bio-fertilizers can replace mineral fertilizer, as long as they are applied at well-defined rates.
ISSN:2073-4395
2073-4395
DOI:10.3390/agronomy11091716