Influences of Long-Term Fertilization on Phosphorus Forms and Availability Within Particle-Size Fractions in a Mollisol

文献类型： 外文期刊

第一作者： Zhang, Jinjing

作者： Zhang, Jinjing;Sun, Yuanhong;Tang, Jiayi;Li, Cuilan;Zhu, Mo;Zhu, Ping

作者机构：

关键词： Phosphorus species; Chemical fractionation; Nuclear magnetic resonance; Enzymatic hydrolysis; Manure; Mineral fertilizers

期刊名称：JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION （ 影响因子：3.1； 五年影响因子：3.6 ）

ISSN： 0718-9508

年卷期： 2025 年

页码：

收录情况： SCI

摘要： Soil particle size plays a pivotal role in phosphorus (P) cycling in terrestrial ecosystems. Here, a field experiment lasting 32 years was performed to investigate the influences of long-term fertilization on forms and availability of inorganic P (IP) and organic P (OP) within particle-size fractions in a Mollisol. The experiment included unfertilized control, mineral fertilizers (nitrogen, phosphorus, and potassium), manure (30,000 and 60,000 kg ha(-1)), and mineral fertilizers combined with manure. Phosphorus forms and availability in sand- (2000-50 mu m), silt- (50-2 mu m), and clay-size fractions (< 2 mu m) were determined by chemical fractionation, phosphorus-31 nuclear magnetic resonance, and enzymatic hydrolysis methods. The concentrations of various P forms were generally greater in silt-size fraction compared to sand- and clay-size fractions. Moreover, sand-size fraction contained 1.48-2.50 times more labile IP and enzymatically hydrolysable OP but less enzymatically non-hydrolysable P relative to clay-size fraction. Independent of particle-size fractions, various forms of P generally displayed higher concentrations in the treatments with than without manure and with high than with low manure rate. Phosphatase was significant factors in shaping total P and P forms associated with soil particle-size fractions. Manure amendment indirectly influenced P forms and availability by affecting phosphatase activity. The combined application of mineral fertilizers and high manure rate is more effective in enhancing P availability in soil. This study provides valuable insights for understanding dynamics of P in soil and for achieving sustainable management of P in agro-ecosystems.

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