A rise in atmospheric CO 2 concentration can have positive or negative effects on soil organic carbon (SOC) pools, with likely impacts on soil nutrient availability, which can in turn, drive ecosystem‐level impacts. Much of the soil nutrients are locked in the more stable mineral‐associated organic matter (MAOM) pool compared to the more labile particulate organic matter (POM) pool, but how elevated CO 2 ( e CO 2 ) affects the...

Aims Many agricultural soils suffer from phosphorus (P) deficiency. Intercropping could improve plant P uptake efficiency and yield compared to monocropping systems. How P fertilization affects yield and P uptake in intercropping remains unclear. Methods In this meta-analysis (including 907 observations from 39 studies) we evaluated how P fertilization influences yield, P and nitrogen (N) uptake in both intercropping and monoc...

Soil nitrogen (N) retention plays a crucial role in determining the ecosystem capacity to buffer anthropogenic N inputs and provides a sustainable N supply. However, the effect of acidification, driven by atmospheric deposition of N and sulfur (S), on the retention and fate of allochthonous N across soil aggregate size classes remains poorly understood. We utilized a soil‐acidification gradient induced by 0–50 g S m −2 year −1...

Background and aims Rhizodeposition is organic matter released by living plant roots that can be transformed by microbes into particulate organic matter (POM), but that can also become more stable through the adsorption of organic matter onto soil minerals (mineral-associated organic matter, MAOM), thereby playing an important role in mitigating climate change. We examined how root-derived carbon (C) as a proxy for rhizodeposi...

Nitrogen (N) enrichment leads to an imbalance of N and phosphorus (P) in plants by enhancing plant N:P, with consequences for ecosystem processes and function. However, the evidence for a plant N–P imbalance is predominantly from studies on aboveground tissues. It remains unclear whether imbalanced aboveground responses would be paralleled by similar responses in roots, which contribute to nearly 70% of total biomass in grassl...

Nitrogen (N) retention is a critical ecosystem function associated with sustainable N supply. Lack of experimental evidence limits our understanding of how grassland N retention can vary with soil acidification. A 15 N‐labeling experiment was conducted for 2 years to quantify N retention by soil pathways and plant functional groups across a soil‐acidification gradient in a meadow. The 15 N added to the ecosystem was mainly int...