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| Effects of cultivation medium pH on growth，photosynthesis and mineral element contents of own-rooted and grafted blueberry saplings… |
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| DOI：10.16768/j.issn.1004-874X.2016.11.009 |
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| Abstract: |
| The adaptation of blueberry to higher soil pH is poor. To explore the effects and probable mechanism
of the adaptation of grafted blueberry（Vaccinium spp.）saplings to the soil environment with higher pH value， three
types of saplings，（1）own-rooted Wufanshu（ V. bracteatum），an economical shrub belonged to the same genus
and family with blueberry，also known as oriental blueberry，（2）own-rooted‘ Sharpblue’，a southern highbush
blueberry（ V. corymbosum） cultivar，and（ 3） grafted-bluebedrry were taken as experimental materials，which were
grown in quataz sand mediums for 90 d，irrigating with nutrient solution of three levels of pH values respectively，
i.e. pH4.6，pH5.8 and pH7.0. Results showed that root development，shoot growth and dry biomass accumulation of
grafted blueberry were significantly better than those of own-rooted blueberry grown in higher pH medium；compared
with own-rooted blueberry sapling，leaf chlorophyll content，chlorophyll a/b ratio，chlorophyll fluorescence chemical
efficiency and photosynthetic efficiency of grafted blueberry sapling grown in higher pH medium were all significantly
improved. Results also showed that mineral element contents of leaves，especially Mg and Fe elemental contents of
grafted blueberry were significantly higher than those of own-rooted blueberry sapling grown in higher pH medium.
Grafting-propagation of blueberry sapling taking Wufanshu as rootstock significantly enhanced the adaptation of
blueberry to soil environment with higher pH value. |
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