GROWTH AND YIELD OF HIGHBUSH BLUEBERRY BLUECROP CV. (VACCINIUM CORYMBOSUM L.) IN RELATION TO THE LEVEL OF NITROGEN FERTILIZATION

K. Smolarz, S. Mercik
A nutritional trial on highbush blueberry Bluecrop cv. was carried out in sandy soil with a low content of organic matter. The experiment was established in the spring of 1983. Nitrogen was applied in the form of ammonium sulphate. The doses of 0, 50, 100 and 150 kg N/ha were compared. The weakest growth of plants was observed on control plots (0 kg N/ha) and the most vigorous on the ones fertilized with 100 kg N/ha. The best yield in 1986 per plant was obtained with 100 kg N/ha, whereas, the lower and the highest doses of ammonium sulphate decreased the yield.

The winter of 1986/87 was very severe. The lowest temperature in the field dropped to - 37,4°C. The most severe frost damages of the bushes were observed on plots fertilized with 150 kg N/ha, whereas, the bushes on control plots were the least affected. Results so far obtained indicate that the optimal nitrogen dose for highbush blueberry plants grown in soil with a low content of organic matter is about 50–100 kg N/ha. An increased N supply resulted in a lower yield and decreased frost resistance.

Smolarz, K. and Mercik, S. (1989). GROWTH AND YIELD OF HIGHBUSH BLUEBERRY BLUECROP CV. (VACCINIUM CORYMBOSUM L.) IN RELATION TO THE LEVEL OF NITROGEN FERTILIZATION. Acta Hortic. 241, 171-174
DOI: 10.17660/ActaHortic.1989.241.27
https://doi.org/10.17660/ActaHortic.1989.241.27

Acta Horticulturae