Soil phosphorus (P) remains an ever-increasing topic of importance, notably for its key role as a nutrient for driving food production but with parallel concerns over damaging water quality, all against a backdrop of uncertainty of long-term rock phosphate supplies. Soil is a key interface that holds P and regulates its onward flow to plants or leakage to waters. Often overlooked are a ubiquitous group of P compounds that exist in alternative oxidation states to that of phosphate (+5). Redox cycling, and the behaviour that chemically reduced P compounds exhibit in soils, introduces alternative routes of cycling P that may become more important as the soil system itself alters, especially due to the external pressures of climate change, bringing about critical dynamics in rainfall and runoff and also wetting and drying. All of these factors are known to affect soil redox potential and consequently the oxidation state of soil P. This review considers the chemically reduced species in the P cycle, exploring their sources and sinks, while considering their importance within the primary global biogeochemical cycling of P and how this may be impacted by climate change in the temperate climate of the northern hemisphere.

中文翻译：

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土壤中减少的磷化合物的循环和气候变化的潜在影响

土壤磷 (P) 仍然是一个日益重要的话题，特别是它作为推动粮食生产的营养素的关键作用，但同时也担心破坏水质，所有这些都是在长期磷酸盐岩供应不确定的背景下进行的。土壤是保持 P 并调节其流向植物或渗入水体的关键界面。经常被忽视的是一组无处不在的 P 化合物，它们以不同于磷酸盐 (+5) 的氧化态存在。氧化还原循环以及化学还原的 P 化合物在土壤中表现出的行为，引入了 P 循环的替代途径，随着土壤系统本身的变化，尤其是由于气候变化的外部压力，导致降雨和径流以及润湿和干燥。