Long term cropping and selected parameters of 15 apple tree cultivars

Abstract

Blažek J., Zelený L., Křelinová J. (2018): Long term cropping and selected parameters of 15 apple tree cultivars. Hort. Sci. (Prague), 45: 11-17.Fifteen apple cultivars registered in the Czech Republic were included in this comparative study. The most productive after eight years of cropping was 'Rucla' , which had a mean yield of 50.9 t/ha. This cultivar was also the most tolerant to late spring frosts. In order of decreasing yields, it was followed by the cultivars 'Rubinstep' , 'King Jonagold' and 'Šampion' . The lowest yield was found for the cultivar 'Fuji Nagafu' (23.7 t/ha) followed by 'Golden Delicious' and 'Rubinola' . The largest canopy volume in 2016 was achieved by 'Rubín' at a level of 2.74 m 3 , followed in decreasing order by 'Rubinola' , 'King Jonagold' and 'Meteor' . According to the final tree canopy volume, the least vigorous was 'Selena' with a mean of 1.50 m 3 . The largest canopy of 2.74 m 3 was exhibited by 'Rubín' . The 'Braeburn' cultivar exhibited the highest degree of spur bearing, followed by 'Lady Silvia' and 'Vysočina' . In contrast, the poorest spur patterns were observed in 'Rubín' and 'Fuji Nagafu' . 'Meteor' was characterised by the densest canopy, whereas the 'Rubín' cultivar was the least dense.