ArticleGlobal change biology2026
From Deficiency to Enrichment: Diverging Soil Phosphorus Trajectories Across China's Croplands (1980-2018).
Article in Global change biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Decades of fertilizer intensification have reshaped phosphorus (P) cycling across China's croplands, driving a widespread transition from P deficiency to enrichment while leaving spatially heterogeneous legacies of accumulated soil P. However, the long-term trajectories of soil available P, their regional divergence, and the drivers regulating P accumulation or depletion remain poorly resolved at the national scale, limiting the development of sustainable and region-specific P management strategies. Here, we integrate nearly 190,000 soil samples from harmonized national soil surveys with long-term fertilization experiments to quantify long-term soil available P dynamics across China at 1 km resolution and to assess the importance of key environmental and management drivers using an interpretable, spatially explicit machine-learning framework. Soil available P increased sharply from 1980 to 2018, with an overall increase of 20.6 mg kg
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