Evaluation of Several Asian Pear Cultivars in the Climatic Conditions of Lower Silesia

Abstract

The Asian pear tree (Nashi), originated in China and Japan, where it is commonly grown. In Europe, in Poland in particular, it remains almost unknown, despite the fact that its cultivation has been proven to be possible there. The aim of the experiment-carried out between 2008 and 2015 at the Fruit Experimental Station Samotwór, next to Wrocław-was to evaluate the growth intensity and yielding of several Asian pear tree cultivars: 'Kosui', 'Shinseiki', 'Nijisseiki', 'Chojuro', 'Hosui', and 'Shu Li'; as well as the quality and biological value of their fruits. 'Conference', which is widespread in Europe, was chosen as the control variety. 'Conference', 'Shu Li', and 'Hosui' showed highest growth intensity, whereas the trees of 'Shinseiki' were the smallest. In terms of yields over the period of eight years following the planting, 'Chojuro' and 'Shinseiki' performed best, while the least fruits were obtained from the 'Nijisseiki' cultivar. Significantly heaviest and biggest fruits were collected from the Chinese 'Shu Li' cultivar. In 2012, Nashi fruits had similar carotenoid, calcium, and magnesium contents as the fruits of 'Conference'.

Evaluation of Phenological and Morphological Properties of Some Asian Pear Varieties in the Climatic Conditions of South Moravia Therapeutic Interventions

“…The flowering time of 'Conference' was evaluated between 2012 and 2015 in southwestern Poland and it varied from 14 th of April to 7 th of May and it corresponds to our results, where 'Conference' was in full bloom on 18 th of April (Sosna, 2018).…”

“…In south-western Poland, where the harvest time of 'Conference' between 2012 and 2015 varied from 17 th to 23 rd of September. In case of this study, the harvest time in 2021 for this variety was on 20 th of September (Sosna, 2018).…”

Evaluation of certain pomological and phenological traits of selected asian pear varieties growing in Middle European conditions

“…In contrast, the varieties with extremely large fruits were 'Zao Su Li' , 'Xue Hua Li' , 'Jin Hua' , 'Dangshansu Li' , 'Sha Li' and 'Wu Jiu Xiang' , which bear fruits as large as 500 g in some cases. In Sosna (2018), the varieties providing the best yield within the assessed eight-year period after planting were 'Chojuro' and 'Shinseiki' , while the smallest fruits were produced by the 'Nijisseiki' variety. The fruits with the significantly highest weight and largest size were produced by the Chinese cultivar 'Shu Li' .…”

Effect of Growth Regulators on the Quality of Apple Tree Whorls

“…However, the production of such a tree at the nursery stage still causes a lot of trouble for growers, since many popular apple tree varieties struggle to form crowns consisting of 5-8 lateral pedicels, and it is almost impossible to obtain it naturally. As a result, it is relatively difficult to obtain a very good quality oculant in a single season, so nursery men produce trees on a 3-year cycle (i.e., knip-boom) or on a 2-year cycle from grafting in hand [8][9][10][11][12][13].…”

“…The quality of a tree and the degree of its branching depend on internal factors, which include: the strength of the rootstock [5,9,10], the ability of a given variety to form lateral shoots [6] and external factors, i.e., the type and effectiveness of treatments used to stimulate branching, soil and climatic conditions associated with the location of the nursery and the course of the weather during the initiation and growth of young shoots [10][11][12].…”