Comparison of growth between own-rooted and grafted 'Aikou' mango trees, and the effects of soil volume on the growth, yield, and fruit quality of potted own-rooted trees

摘要

This study investigated the characteristics of own-rooted 'Aikou' mango trees [Mangifera indica L.) propagated by air layering. The own-rooted, 4-year-old trees were compared with grafted trees (Scion: 'Aikou', rootstock: 'Aikou' seedling). Growth ofthe own-rooted trees was significantly lower than that of grafted trees. Except for the shoots, thick branches, and fine roots, the flesh and dry weights of each own-rooted tree organ were lower than those of grafted trees. Total fresh and dry weights ofthe own-rooted trees were about 56% and 51% of the grafted trees, respectively. The effects of soil volume (15-, 30-, and 45-L pots) on own-rooted trees were also examined over 9 years. The differences in tree growth were not significant among soil volumes. In addition, the differences in yield, fruit number per tree, and average fruit weight among soil volumes were not significant. Fresh weights of the leaves and fine roots, as well as total fresh weights of the under-ground plant parts, increased with soil volume. There were no differences in the fresh weights of shoots, trunks, or thick roots among the soil volumes. Fresh weights of the above-ground plant parts and total tree fresh weights for the 30- and 45-L treatments were significantly greaterthan those of the 15-L treatment. Differences in dry weights of each organ were approximately the same as the fresh weight differences. There was no observed effect of soil volume on fruit quality.