Abstract
The study presents the behaviour of 28 apricot cultivars planted in 2017 in the Experimental Field of the Faculty of Horticulture within the University of Agronomic Sciences and Veterinary Medicine of Bucharest. The foreign cultivars grafted on Myrobalan 29C, Saint Julien A and GF 677, were planted at 4.5 x 1.5 m and 3.5 x 2.0 m for Parallel U and respectively, 3.5 x 2.0 m for Trident canopy. Trees vegetative growth was evaluated by analysing the trunk cross section, tree height, fruiting branches number and length. First fruit yield was heighted and the productivity index was calculated. The results show differences in growth correlated with the canopy, cultivars and used rootstocks. Correlations between analysed parameters are presented. As a conclusion, the differences between the two canopies, Parallel U and Trident, using different types of rootstocks show their influence on the annual vegetative growth and on apricot trees productivity. Some preliminary conclusions can be drawn regarding the advantages and disadvantages of using the two canopies in apricot orchards.
Highlights
Apricot is an important fruit crop for the southern and western regions of Romania with a long tradition of cultivation (Bălan et al, 2008)
The present paper presents some preliminary results regarding the behaviour of 28 cultivars, most of them new introduced to Romania, cultivated in Bucharest on two canopies Parallel U and Trident on different rootstocks
Tree vigour Tree height was both influenced by cultivar and rootstock
Summary
Apricot is an important fruit crop for the southern and western regions of Romania with a long tradition of cultivation (Bălan et al, 2008). In order to evaluate the behaviour of new genotypes in different cultivation area (Gouble et al, 2020), field trials are essential and the results over few testing years need to be used when the introduction of a new cultivar is decided (Stănică et al, 2010; Stănică and Eremia, 2014; Tabakov and Yordanov, 2012; Zaman et al, 2018). The field performances of a new cultivar, regarding the tree vigour, growth, yield and fruit quality, besides its genetic heritage, are essentially influenced by the rootstock (Duval et al, 2012; Krška et al, 2012; Tabakov and Yordanov, 2012), planting system and tree canopy (Stănică et al, 2012; Matei et al, 2013; Stănică and Eremia, 2014; Negru, 2019; Negru and Peșteanu, 2019). The present paper presents some preliminary results regarding the behaviour of 28 cultivars, most of them new introduced to Romania, cultivated in Bucharest on two canopies Parallel U and Trident on different rootstocks
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