Investigation of fertilisation impact on fresh strawberries yield and quality parameters
2017
Sprogis, K., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Food Technology. Dept. of Food Technology | Kince, T., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Food Technology. Dept. of Food Technology | Muizniece-Brasava, S., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Food Technology. Dept. of Food Technology
Strawberries are a choice fruit crop for many home gardeners. The low-growing plants are reliable and quick to produce. June bearers provide a delicious supply of fruit from late spring through early summer, while day-neutral types produce berries throughout the summer. The main purpose of the current research was to evaluate fertilizers impact on strawberries yield and quality parameters. In the experiments freshly picked garden strawberries cv Polka harvested in Koknese region (Latvia) in July 2016 were analysed. For strawberries fertilization Ferticare™ Kombi 1 (NPK 14-11-25+micro) with and without Ca (NO3)2 , YaraLiva™ Calcinit with and without Ca (NO3)2 were applied at the rate 100 kg N haE-1 and 50 kg N haE-1. As a control , strawberries without fertilizer were analysed. The main quality parameters were tested using standard methods: yield (t haE-1 ); berries firmness (N); pH; nitrate content (mg kgE-1 ); soluble solids ( ◦Brix); extra, proportion of I and II class berries from total yield (%); sensory properties of strawberries (line scale). During the current research significant impact of nitrogen fertilizer on the pH and firmness of strawberries, the content of soluble solids, nitrates content in berries, as well as the yield has been established. As a result, 50 kg of nitrogen fertilizer per hectare should be recommendable during spring strawberries fertilization with NPK 14-11-25+micro when the strawberry yield were 12.7 tons, the berry firmness was 0.94 N, pH was 3.67, nitrates in berries was below 36 mg kgE-1 , the content of the soluble solids was 11.8 ◦Brix and the proportion of Extra, I and II categories berries was 83% from total yield.
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