Peach seedling growth in replant and non-replant soils after inoculation with arbuscular mycorrhizal fungi |
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Authors: | Kipkoriony L Rutto Fusao Mizutani |
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Institution: | a The Experimental Farm, Faculty of Agriculture, Ehime University, Hattanji 498, Matsuyama, Ehime 799 2424, Japan b Department of Horticulture, Jomo Kenyatta University of Agriculture and Technology (JKUAT), P.O. Box 62000, Nairobi 00200, Kenya |
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Abstract: | The effect of pre-inoculation with arbuscular mycorrhizal fungi (AMF) on post-transplant growth of peach seedlings in replant and non-replant soils was studied for two successive seasons. Seedlings raised in sterile media and pre-inoculated with soil-based Gigaspora margarita inoculum were transplanted in replant and non-replant field soils alongside non-inoculated controls. Pre-inoculated seedlings transplanted in non-replant soils showed greater initial growth in the first year. Plant height, and lateral shoot length and number was highest in non-replant soils irrespective of mycorrhizal pre-inoculation. Similarly, biomass yield was significantly higher in seedlings in non-replant soils, though there were no significant differences in shoot/root ratios, and in tissue mineral content between and within treatments. Seedling infection by indigenous AMF was high in both replant and non-replant soils, and even non-inoculated seedlings recorded high infection levels after the first season. Generally, mycorrhizal activity was lower, and spore populations higher in replant soils, while the opposite was true in non-replant soils. It seems that soil sickness has a negative impact on plant metabolism and limits the capacity of the plant host to support the mycorrhizal symbiosis. |
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Keywords: | Mycorrhizal pre-inoculation Peach Replant soil Seedling growth Biomass production |
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