Dynamic interplay between soil microbial communities, enzyme activities, and pear quality across planting years.

Among the top 11 bacteria in pear rhizosphere soil average relative abundance, with Bradyrhizobium decreasing in relative abundance at the peak pear fruiting stages (T20 and T30), while Acidothermus showed an increasing trend in relative abundance with increasing planting years.

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Fruit quality analysis Analysis of the effect of planting years on the quality of pears showed that ( Figure 1 ), with the increase of planting years, sucrose, reducing sugar and Vc content in pears showed a trend of first increasing and then decreasing, which was manifested as T30 ≈ T20 > T40 > T5.

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Soil polyphenol oxidase activity showed a decreasing trend with increasing planting years, which was manifested as T5>T20>T30>T40, and there was a significant difference ( p <0.05) between all planting years.

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