| 标题 |
 Soil carbon sequestration enhanced by long-term nitrogen and phosphorus fertilization 长期氮磷施肥增强土壤固碳作用
相关领域
人类受精
农学
土壤碳
土壤水分
肥料
磷
土壤有机质
牧场
堆积密度
环境科学
土层
动物科学
化学
土壤科学
生物
有机化学
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Abstract Soil organic carbon is crucial for climate mitigation and agroecosystem sustainability, yet its depletion is concerning and its response to long-term fertilization remains unclear. Here we leverage the Broadbalk Classical Experiment at Rothamsted (UK), the world’s longest-running continuous winter wheat fertilization trial, along with 14C labelling, metagenomics and metabolomics to determine how 180 years of nitrogen (N) and phosphorus (P) fertilization impact soil organic carbon dynamics. Compared with no fertilization, long-term P, N and combined NP fertilization increased the soil organic carbon content by 10%, 22% and 28%, respectively. P application alone disproportionately increased microbial respiration (37%) and biomass (20%), limiting stable carbon formation and slightly increasing labile carbon. N application alone increased microbial carbon use and necromass accumulation efficiency, increasing mineral-associated carbon build-up. |
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