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The reduction of nitrogen fertilizer combined with humic acid application improves potato yield by modulating soil microbial community structure in arid and semi-arid regions.

Frontiers in plant science | 2026

This study evaluates the effect of combining nitrogen fertilizer reduction with humic acid application on potato yield, nitrogen use efficiency, and rhizosphere soil microbial communities in semi-arid regions. The findings demonstrate that a 20% reduction in nitrogen combined with liquid humic acid application enhances potato tuber yield and nitrogen uptake by modulating soil nutrient availability and microbial community structure.