ABSTRACT

The basic shoot characteristics of ‘Karina’ and ‘Sylvia’ sweet cherry (Prunus avium L.) trees grafted on Gisela 3, Gisela 5, Piku 4, Weiroot 72 and F12/1 rootstocks were examined 3 years after planting. In both cultivars, F12/1 achieved a greater shoot length (SL) and diameter (SD) and a lower number of flower clusters per cm SL (NFC·cm⁻¹ SL) than the other rootstocks. Furthermore, although the two cultivars had different growth vigour, they exhibited similar differences in SL, SD and NFC·cm⁻¹ SL among the rootstocks. The correlation between SL and NFC·cm⁻¹ SL was 34.4% and 39.9% greater than the correlation between SD and NFC·cm⁻¹ SL in ‘Karina’ and ‘Sylvia’, respectively. Regression analysis for both cultivars on particular rootstocks and for the mean values across the rootstocks showed that there was a logarithmic relationship between SL and NFC·cm⁻¹ SL, with r² values of 0.703 and 0.694 for ‘Karina’ and ‘Sylvia’, respectively, when the responses were fitted by logarithmic function models. The minimum and maximum NFC·cm⁻¹ SL predicted by these models were approximately 0.01 and 0.9 (for SL = 145 and 7 cm, respectively) for ‘Karina’ and 0.0 and 0.9 (for SL = 150 and 5 cm, respectively) for ‘Sylvia’. These findings combined with data obtained in previous studies suggest that NFC·cm⁻¹ SL can be used as an index for predicting the fruiting potential of young sweet cherry trees.

摘要

种植3年后，检查了嫁接在Gisela 3，Gisela 5，Piku 4，Weiroot 72和F12 / 1砧木上的'Karina'和'Sylvia'甜樱桃（Prunus avium L.）树木的基本芽特征。与其他砧木相比，在两个品种中，F12 / 1的芽长（SL）和直径（SD）都更高，每厘米SL（NFC·cm ^-1 SL）的花簇数也更少。此外，尽管两个品种的生长活力不同，但它们在砧木之间的SL，SD和NFC·cm ^-1 SL表现出相似的差异。SL与NFC·cm ^-1之间的相关性比SD与NFC·cm ^-1之间的相关性分别大34.4％和39.9％SL分别在“ Karina”和“ Sylvia”中。对特定砧木的两个品种以及砧木的平均值进行回归分析表明，SL和NFC·cm ^-1 SL之间存在对数关系，“ Karina”和“ Sylvia”的r ²值分别为0.703和0.694，分别通过对数函数模型拟合响应时。这些模型预测的 'Karina'的最小和最大NFC·cm ^-1 SL分别约为0.01和0.9（分别针对SL  = 145和7 cm）和0.0和0.9（分别针对SL  =  150和5 cm）。 '西尔维亚'。这些发现与先前研究中获得的数据相结合，表明NFC·cm ^-1 SL可以用作预测年轻甜樱桃树结实潜力的指标。