Study on the growth and spatial distribution of the root system of different european pear cultivars on quince rootstock combinations

Abstract Information on root development is an essential tool capable of identifying, among plants of a species, the one that has the greatest capacity to potentiate growth and development characteristics in its aerial part. The aim of this study was to characterize the distribution of the root system throughout the soil profile of different European pear cultivars and quince rootstock combinations on medium plant density systems (2500 plants ha-1). The combinations evaluated were: Abbè Fetel/Adams, Clapp´s Favourite/EMA, Santa Maria/Adams, Rocha/Adams, Decana du Comice/Adams, Packham´s Triumph/EMA, Packham´s Triumph/Adams and Conference/ Adams. In relation to effective depth, it was observed that up to 40 cm deep, 80% of the total root length and 83% of root concentration were found for all combinations. For the effective distance, it was observed that 80% of the total root length is distributed in up to 80 cm for all combinations, except for Clapp’s Favourite/EMA, whose actual distance was 100 cm. It was observed that the average of six combinations, 86% of root growth in the horizontal distance is located up to 80 cm.

摘要：根系发育相关信息可为同一物种内筛选出具备最强地上部生长与发育性状增强潜力的植株提供关键依据。本研究旨在明确中等种植密度（2500株/公顷）下，不同欧洲梨品种与榅桲砧木组合的根系在整个土壤剖面中的分布特征。供试组合包括：阿贝费特尔/亚当斯、克拉普优选/EMA、圣玛丽亚/亚当斯、罗查/亚当斯、迪坎纳·杜·科米斯/亚当斯、帕卡姆凯旋/EMA、帕卡姆凯旋/亚当斯以及康弗伦斯/亚当斯。就有效土层深度而言，所有供试组合的总根长的80%与根集中程度的83%均分布于0~40 cm土层范围内。就有效水平分布距离而言，除克拉普优选/EMA组合的有效水平分布距离为100 cm外，其余所有组合的总根长的80%均分布于0~80 cm范围内。经观测，6个供试组合的平均水平分布数据显示，其总根系生长量的86%均分布于0~80 cm的水平范围内。