During two consecutive years (2014 and 2015) we investigated tree vigour, productivity, and the main physicochemical attributes of Carmen, Kieffer, Santa Maria, and Williams pears grafted on quince BA.29. Results showed that trunk cross-sectional area (TCSA), yield per tree (Y), yield efficiency (YE), and number of fruits per tree (NFT) were significantly affected by cultivar and years, whereas the interaction of cultivar × year influenced only Y and YE. Carmen and Kieffer had the largest trees and Williams the smallest. Santa Maria and Williams had the best productivity attributes (Y, YE, and NFT). In 2015, TCSA and Y were better, whereas YE was higher in 2014. Kieffer had superior fruit weight, fruit width, and surface area, whereas Carmen had the highest fruit length and flesh firmness. Year-by-year variations of physical properties were not significant, with the exception of length/diameter (L/D) ratio and flesh firmness, whereas the interaction of cultivar × year significantly influenced fruit physical properties, except for L/D ratio. Soluble solids content was not influenced by cultivar, year, or their interaction. Titratable acidity and maturity index were highest in fruits of Santa Maria and lowest in Carmen and Kieffer, respectively. Mean acidity content was higher in 2015, whereas maturity index was higher in 2014. The interaction of cultivar × year affected only acidity content. Significant correlations were found among some pear tree, yield, and fruit quality properties. Principal components analysis showed that there are large variations among varieties in terms of agronomic and fruit quality attributes. It can be said that in terms of positive traits of the tree, productivity, and fruit, Williams and Santa Maria can be singled out, while Carmen and, especially, Kieffer are recommended for growing on a small scale in similar conditions.

在连续两年（2014 年和 2015 年）中，我们调查了嫁接在木瓜 BA.29 上的 Carmen、Kieffer、Santa Maria 和 Williams 梨的树势、生产力和主要物理化学属性。结果表明，树干截面积（TCSA）、单树产量（Y）、产量效率（YE）和单树果实数（NFT）受品种和年份的影响显着，而品种×年份的交互作用影响只有 Y 和 YE。卡门和基弗拥有最大的树，而威廉姆斯最小。Santa Maria 和 Williams 的生产力属性最好（Y、YE 和 NFT）。2015 年，TCSA 和 Y 较好，而 YE 在 2014 年较高。Kieffer 的单果重、果宽和表面积均较高，而 Carmen 的果长和果肉硬度最高。物理性质的逐年变化不显着，除了长径比和果肉硬度，而品种×年份的相互作用对果实物理性质有显着影响，除了长径比。可溶性固形物含量不受品种、年份或其相互作用的影响。圣玛丽亚果实的可滴定酸度和成熟度指数分别最高，卡门和基弗果实最低。2015年平均酸度含量较高，而2014年成熟度指数较高。品种×年份的相互作用仅影响酸度含量。在一些梨树、产量和果实品质特性之间发现了显着的相关性。主成分分析表明，不同品种在农艺和果实品质属性方面存在较大差异。