Influence of PRD and mulching on nutrient contents of raspberry
This field experiment was designed to determine the content of macro- and micro-minerals in raspberry fruits after applying water stress as partial rootzone drying. Fruits were analysed at harvest and after storage. Four methods of irrigation were studied: one irrigation line adjacent to canes, two lateral irrigation lines adjacent to canes, and an irrigation line 20 cm from the canes and without irrigation. Each treatment consisted of 10 plants; half of them were mulched with a 10-cm layer of wood chips (size 1-2 cm) in the first year of experiment while, in the second year a 20-cm layer of mulch was applied to the same plants. Using ANOVA two-way with post hoc testing, we found significant differences in the contents of nutrients in fruit at harvest but also after storage. The highest values for pH, Brix, dry matter, vitamin C, Ca, K, and Ni were found at harvest while for acids, Fe, Zn, B, Pb, Mg, Mn and Cr they were highest after storage. For macronutrients such as N and P, the lowest concentrations were observed when one irrigation lateral was installed 20 cm from the canes followed by one irrigation line immediately adjacent to the canes. Application of mulching in combination with regulated deficit irrigation is a new technique that can be successfully applied to young pears to improve fruit quality.
Lepaja, K., Kullaj, E., Lepaja, L. and Krasniqi, N. (2018). Influence of PRD and mulching on nutrient contents of raspberry. Acta Hortic. 1217, 137-144
Rubus idaeus, water stress, PRD, mulch