Denitsa Hristova1, Petya Ivanova2, Diyan Georgiev1 and Maria Georgieva1
1 Agricultural Academy, Research Institute on Mountain Stockbreeding and Agriculture, Troyan 5600, Bulgaria
2 Agricultural Academy, Institute of Food Preservation and Quality, 4003 Troyan, Bulgaria
Hristova, D., Ivanova, P., Georgiev, D. & Georgieva, M. (2022). Degree of the impact of fertilizing and drying process on the colour indicators of plum cultivar Elena. Bulg. J. Agric. Sci., 28 (5), 822–827
The impact of the applied fertilizers and the drying process on the quality characteristics of the plums was determined.
It was found that the applied agrotechnics had an impact on certain characteristics of fresh fruits from the studied variants. The measured colour coordinates of fresh plums showed that the method of cultivation (P < 0.05) had an impact on the brightness of the variants. The colour saturation had significantly been affected by the fruits with applied chicken manure, while the fruits of the other variants had values close to the control.
It was found that the drying, using a heat pump dryer with temperature of t = 43 ± 2°C and φ = 10%, did not significantly affect the quantitative values of fruit colour, brightness, red colour tone, colour tone and saturation (P > 0.05).