Abstract

DE ANGELIS, V; CALVO, P; RAFFO, D  and  MENNI, M.F. Comportamiento productivo de diferentes combinaciones cultivarportainjerto de peral en el Alto Valle de Río Negro y Neuquén. RIA. Rev. investig. agropecu. [online]. 2015, vol.41, n.1, pp.94-101. ISSN 1669-2314.

In order to evaluate the vegetative and reproductive behavior of different pear rootstocks in the Alto Valle de Río Negro y Neuquén region, a trial was designed with four rootstocks: seedling, BA29, BP1, MC and Sydo. The pear cultivars were: Pyrus communis cv Williams, Abate Fetel and Beurre D’ Anjou. Trees were planted in 2001, spaced at 4 x 2 m and trained with a central axis. The vegetative and reproductive parameters evaluated were: Trunk cross-sectional area (TCSA; cm2); Canopy in the file (CF, m); Annual shoot growth (ASG, m); cumulative yield (CY, kg pl -1); Estimated production per hectare (EPH , t ha-1); Cumulative yield efficiency (CYE, kg cm -2); Fruit size distribution (FSD); Incompatibility symptoms in the graft union and plant mortality. In all tested cultivars, the seedling had the highest vegetative and reproductive performance (highests TCSA, CF, ASG, CY, EPH and CYE). In all the studied cultivars the quince rootstocks showed mild to moderate symptoms of incompatibility in the graft union and the highest plant mortality. The low productivity of the combinations with quince rootstocks probably was associated to the incompatibility observed at the graft union. This fact had possibly been exacerbated by the climatic conditions of the area, which is characterized by high temperatures, strong winds and low relative humidity, increasing the existing problems of transportation between the root and the canopy and, consequently, affecting the normal development of plants.

Keywords : Incompatibility; Productivity; Vegetative development.

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