Evaluation of organic fertilizers for primocane raspberries in high tunnel

Since primocane raspberries become more popular in growing, their fertilization is taking an important part.
The use of various extra organic materials for plant fertilization is increasing due to increased interest in organic production.
The aim of this study was to compare the effects of different fertilizers on the primocane raspberry growth and yield components.
The study includes three types of soil treatments: control – K (with additional fertilization); vermicompost – V (100 g of vermicompost plant^‑1) and digestate – D (6.4 kg of the digestate m^‑2 was incorporated by human-powered rototilling before planting at a depth of 20 cm). The trial was established in autumn 2015. Two primocane cultivars: ‘Polka’ and ‘Polana’, were included in the trial.
Shoot length, chlorophyll content in leaves, yield, berry weight, disease damage intensity and chemical content of berries were evaluated.
In 2017, the shoot length was significantly higher (p<0.05) than in 2016. In 2016, the longest shoots were in the treatment K in ‘Polka’, while in ‘Polana’ in the treatment V. In 2017, the longest shoots were registered in ‘Polka’ in the treatment V, and in ‘Polana’ in the treatment D, however, differences between treatments were not significant (p>0.05), because of large data dispersion.
The total yield of ‘Polana’ was higher (p<0.05) than that of ‘Polka’. For both cultivars, the highest yield was in the treatment K, while the lowest yield was in the treatment D. The highest content of total phenols was found in the treatment K for both cultivars.
The highest content of vitamin C and anthocyanins was found for cultivar ‘Polka’ in the treatment D.

XII I8nternational Rubus and Ribes Symposium: Innovative Rubus and Ribes Production for High Quality Berries in Changing Environments

I. Kalnina, S. Strautiņa, V. Laugale

FVG tunnel, ‘Polka’, ‘Polana’

https://doi.org/10.17660/ActaHortic.2020.1277.39