Abstract:

This study aims to evaluate the regulatory effects of attapulgite-based biofertilizers on the growth of continuous cropping strawberry plants and soil environment. Using the strawberry cultivar ‘Hongyan’ as the experimental material, treatments were designed as follows: conventional fertilization (CK) and supplemental commercial organic fertilizer (T3) as controls, compared with supplemental attapulgite composite microbial fertilizer (T1) and attapulgite bio-organic fertilizer (T2). The results demonstrated that, compared to CK, T1 and T2 treatments significantly increased the yield of continuous cropping strawberries by 15.56% and 12.71%, respectively. Fruit quality was also improved, with soluble solids content elevated by 43.00% and 41.17%, and soluble sugar content increased by 31.40% and 26.32%, respectively. Additionally, both treatments markedly enhanced soil organic matter and invertase activity. Compared to CK, microbial community analysis revealed that T1 increased bacterial Chao and Shannon indices by 1.18-fold and 1.03-fold (P<0.01), while T₂ elevated fungal Chao and Shannon indices by 1.72-fold and 1.14-fold (P<0.05). Furthermore, both treatments significantly increased the relative abundance of Glomeromycota while reducing Basidiomycota abundance (P<0.05). At the genus level, beneficial microorganisms such as Phenylobacterium sp., Linnemannia sp., and Chrysosporium sp. were enriched, whereas the pathogenic fungus Dactylonectria sp. was suppressed (P<0.05). These findings indicate that attapulgite-based biofertilizers effectively mitigate strawberry continuous cropping obstacles.

Key words: attapulgite-based biofertilizers, strawberry continuous cropping obstacles, soil environment regulation, soil microbial community, fertilizer efficiency comparison effect