College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China; Anhui Province Key Lab of Farmland Ecological Conservation and Pollution Prevention, College of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China.
Research Institute of Petroleum Exploration and Development, PetroChina, Beijing, 100083, China; State Key Laboratory of Petroleum Geochemistry, China National Petroleum Corporation, Beijing, 100083, China.
Environ Res. 2022 Nov;214(Pt 2):113894. doi: 10.1016/j.envres.2022.113894. Epub 2022 Jul 19.
Phosphates are the dominant phosphorus (P) source on Earth. The phosphates govern available P in soil, or even the complete ecosystem. The common deficiency of available P in carbonate-enriched soils suggests the tight correlation between P and C biogeochemistry, although the two elements have diverse abundance in soil. The influences of carbonates on P cycle were reviewed in this study, via both abiotic and biotic pathways. The abiotic processes at geochemical scale include element release, transport, sorption, desorption, weathering, precipitation, etc. The sorption of P on carbonate and buffering ability of carbonates were particularly addressed. Biotic factors are ascribed to various microorganisms in soil. As the most active P pool in soil, microorganisms prefer to consume abundant P, and then accumulate it in their biomass. Carbonates, however, are usually utilized by microorganisms after conversion to organic C. Meanwhile, extracellular precipitation of Ca-P phases significantly regulates the transportation of P in/out the cells. Moreover, they boost and complexify both carbonates and P turnover in soil via bioweathering and biomineralization, i.e., the intense interactions between biosphere and lithosphere. Based on this review, we proposed that carbonates may negatively affect P supply in soil system. This comprehensive review regarding the regulation by carbonates on P biogeochemistry would shed a light on predicting long-term P availability influenced by C biogeochemistry.
磷酸盐是地球上主要的磷（P）来源。磷酸盐控制着土壤中可利用的磷，甚至控制着整个生态系统。富碳酸盐土壤中普遍存在可利用磷的缺乏，这表明 P 和 C 生物地球化学之间存在紧密的相关性，尽管这两种元素在土壤中的丰度不同。本研究通过非生物和生物途径综述了碳酸盐对磷循环的影响。地球化学尺度上的非生物过程包括元素释放、运输、吸附、解吸、风化、沉淀等。特别关注了 P 在碳酸盐上的吸附和碳酸盐的缓冲能力。生物因素归因于土壤中的各种微生物。作为土壤中最活跃的 P 库，微生物优先消耗丰富的 P，然后将其积累在生物量中。然而，碳酸盐通常在转化为有机 C 后被微生物利用。同时，细胞外 Ca-P 相的沉淀显著调节了 P 在细胞内外的运输。此外，它们通过生物风化和生物矿化促进和复杂化了土壤中的碳酸盐和 P 转化，即生物圈和岩石圈之间的强烈相互作用。基于此综述，我们提出碳酸盐可能会对土壤系统中的磷供应产生负面影响。本综述深入探讨了碳酸盐对磷生物地球化学的调节作用，为预测受 C 生物地球化学影响的长期磷有效性提供了依据。
