Background and aims: Phosphorus (P) is an essential element for crop growth. However, while links of P turnover in soils to carbon (C) and nitrogen (N) availability have been described, it remains to be clarified how combinations of fertilizer C and N additions affect stocks and cycling of distinct P fractions at different soil depths. The objectives of our study were (1) to assess how soil total P stocks are affected by organic amendments and N fertilization, (2) to evaluate how different soil P fractions respond to N fertilization, and (3) to verify whether N fertilization increases soil biological P cycling.

中文翻译：

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在长期的田间试验中，通过碳和氮的施肥改变了土壤磷的循环

背景和目的：磷（P）是作物生长的重要元素。然而，尽管已经描述了土壤中磷的转化与碳（C）和氮（N）的可利用性之间的联系，但仍需弄清楚肥料C和N的添加组合如何影响不同土壤深度下不同P组分的存量和循环。我们的研究目标是（1）评估土壤有机磷和氮肥对土壤总磷储量的影响；（2）评估不同土壤磷组分对氮肥的响应方式；以及（3）验证氮肥是否增加土壤生物磷循环。