Performance of 'Rocha' pears on three rootstocks planted in high-density

M.S. Pasa; A.F. Brighenti; M.N. CiottaB. Carra

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Performance of 'Rocha' pears on three rootstocks planted in high-density

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The objective of this study was to evaluate the effect of different rootstocks on the performance of 'Rocha' pears planted in high-density. Single-axis trees of 'Rocha' pears grafted on Pyrus calleryana (PC), quince BA29 and quince EMA were planted (1×4 m; 2500 trees ha~(-1)) in the winter of 2008 in S?o Joaquim, Santa Catarina State (southern Brazil). The experiment was arranged in a randomized block design, with four replications (five trees each). Adjacent rows of 'Packham's Triumph' were planted for pollination. Yield components, trunk cross sectional area (TCSA) and fruit quality attributes were assessed from 2014/15 to 2017/2018. The trees on quince 'BA29' showed the greatest yield components (yield and yield efficiency), although in some cases not differing significantly from trees on 'EMA' while PC showed the lowest values. Trees on PC had larger TCSA than both quinces. Fruit of 'EMA' were smaller than PC, whereas 'BA29' was intermediate and did not differ from the other rootstocks. Flesh firmness was lower from both quinces, but soluble solids was higher when compared to PC. Growing pear trees in high-density systems requires an adequate control of vegetative growth, which is primarily provided by the right choice of rootstock. Our results show that the vigorous PC is not a suitable rootstock choice for such systems in southern Brazil, due to low yields and excessive vigor induced. The quince BA29 seems to be the best choice for high-density plantings in S?o Joaquim, since it induces a moderate vigor (greater TCSA than EMA and lower than PC), acceptable yields, and good fruit size. Considering that there is a wide range of soil types in southern Brazil and rootstock performance is closely related to soil type, the rootstock choice should carefully consider representative research results of a given region.

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来源
《Acta Horticulturae》 |2021年第1303期|205-210|共6页
作者
M.S. Pasa; A.F. Brighenti; M.N. CiottaB. Carra;
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作者单位

Department of Horticulture, Oregon State University, Mid-Columbia Agricultural Research and Extension Center, 3005 Experiment Station Drive, Hood River, OR, USA;

Santa Catarina Agricultural Research and Extension Agency, Sa?o Joaquim, SC, Brazil;

Federal University of Pelotas, Pelotas, RS, Brazil;

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正文语种英语
中图分类园艺;
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Pyrus sp.; Cydonia oblonga; yield; vigor control; fruit quality;

Performance of 'Rocha' pears on three rootstocks planted in high-density

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