Abstract Understanding the abundance of organic P in soil is a prerequisite for predicting the effects of climate change on P dynamics and availability in cold alpine regions. We sampled plant roots (up to 40 cm depth) and soils (100 cm depth) in grasslands along a 2300 m altitude gradient (1286–3589 m above sea level, mean annual temperature (MAT) from 9 to 0.3 °C) between alpine steppes on the Loess Plateau and alpine meadows on the Tibetan Plateau. A modified Hedley P fractionation in combination with root and microbial P, alongside phosphatase activity, was used to characterize P transformations depending on climate. Both the roots and microorganisms stored more P and produced higher phosphatase activity in cold meadow than in warm steppe soils. Total inorganic P (Pi) content decreased in cold meadow (MAT

中文翻译：

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沿2300 m海拔梯度随温度降低土壤磷积累变化

摘要 了解土壤中有机磷的丰度是预测气候变化对寒冷高寒地区磷动态和有效性影响的先决条件。我们沿着 2300 米的海拔梯度（海拔 1286-3589 米，年平均温度 (MAT) 从 9 到 0.3 °C）在高山之间的草原上对植物根部（深度可达 40 厘米）和土壤（深度为 100 厘米）进行采样。黄土高原的草原和青藏高原的高寒草甸。改进的 Hedley P 分馏结合根和微生物 P 以及磷酸酶活性，用于表征取决于气候的 P 转化。与温暖的草原土壤相比，寒冷草甸的根和微生物储存更多的磷并产生更高的磷酸酶活性。冷草甸（MAT）中总无机磷（Pi）含量降低