Abstract
The aim of this study was to assess the yield and fruits quality of plum produced in ecological system.In 2019-2020 periods the influence of different fertilizers (Biohumus, Macys BC 28 and Cifamin BK) on yield and fruits quality at three plum cultivars (‘Centenar’, ‘Tita’ and ‘Stanley’) was carried out in a demonstrative plot from Research Institute for Fruit Growing Pitești, Romania. Biohumus was applied to the soil in increasing dosesfrom 0.5 l/tree (respectively 415 l/ha), 0.7 l/tree (respectively 585 l/ha) to 0.9 l / tree (respectively 750 l/ha) in two moments: in spring before the start of vegetation and in autumn after the fall of the leaves.Macys BC 28 and Cifamin BK fertilizers were applied foliar in doses of 2 l/ha, respectively 1 l/ha, in two moments: after flowering and in the young fruit phase.As results of the investigations we found that: the highest fruit yield was obtained at ‘Centenar’ (47.36 kg/tree) and ‘Stanley’ (41.00 kg/tree) cultivars in fertilization variant 3 (Biohumus – 0,9 l/tree, soil application + Macys BC 28 – 2 l/ha, foliar application + Cifamin BK – 1 l/ha, foliar application);the best results regarding the fruits weight were also obtained in the 3rd fertilization variant (Biohumus – 0,9 l/tree, soil application + Macys BC 28 – 2 l/ha, foliar application + Cifamin BK – 1 l/ha, foliar application), among the varieties being noted the ‘Tita’cv. with an average fruit weight of 59. 14 g; the fruits soluble solid content was higher in the case of the fertilized variants than in the unfertilized variant and the fruits aciditywas higher in the case of the unfertilized variant than in the fertilized variants.
Highlights
Ecological agriculture has the potential to reduce the impacts of agriculture on humans and ecosystems, but it has been claimed that organic production system are less efficient, fruits production being lower than in the conventional production system (McArtney and Walker, 2004;Talamini do Amarante et al, 2008; Malezieux et al, 2018)
The aim of this paper was to evaluate yield and some important quality parameters of three plum cultivars from orchards managed under ecological system
On the three cultivars studied, between the fertilized and unfertilized variants there are significant differences.The fruits production per tree increased with increasing Biohumus doses
Summary
Demand for ecological products by European consumer’s increased (Amarante et al, 2008, Cuevas et al, 2015). Ecological produced foods are widely believed to satisfy the above demands, leading to lower environmental impacts and higher nutritive values. European Union guidelines’ regarding ecological management practices exclude the use of synthetic pesticides and fertilizers, allowing the use of animal and green manures, compost, sulfur and copper products, botanical insecticides, traps and other biological control methods (Holb et al, 2003, Peck et al, 2006, Jonsson, 2007, Amarante et al, 2008). Ecological agriculture has the potential to reduce the impacts of agriculture on humans and ecosystems, but it has been claimed that organic production system are less efficient, fruits production being lower than in the conventional production system (McArtney and Walker, 2004;Talamini do Amarante et al, 2008; Malezieux et al, 2018). The aim of this paper was to evaluate yield and some important quality parameters of three plum cultivars from orchards managed under ecological system
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