文献类型：期刊文献

英文题名：Contrasting effects of long-term nitrogen and phosphorus fertilization on phosphorus availability in soil

作者：Tong, Ran[1] Yu, Han[1,2] Zhu, Nianfu[1] Miao, Yongzhao[1] Chen, Song[1] Zheng, Yeshi[3] Wu, Tonggui[1] Wang, G. Geoff[4] Kuzyakov, Yakov[5,6]

第一作者：童冉

通信作者：Tong, R[1];Kuzyakov, Y[2];Kuzyakov, Y[3]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Peoples R China;[2]Nanjing Forestry Univ, Coll Landscape Architecture, Nanjing 210000, Peoples R China;[3]East China Survey & Planning Inst Natl Forest, First Dept Forest & Grass Comprehens Monitoring, Hangzhou 311100, Peoples R China;[4]Clemson Univ, Dept Forestry & Environm Conservat, Clemson, SC 29634 USA;[5]Univ Gottingen, Dept Soil Sci Temperate Ecosyst, D-37077 Gottingen, Germany;[6]Peoples Friendship Univ Russia, RUDN Univ, Moscow 117198, Russia

年份：2026

卷号：8

期号：1

外文期刊名：SOIL ECOLOGY LETTERS

收录：Scopus(收录号：2-s2.0-105027919632);WOS:【ESCI(收录号:WOS:001665380400002)】；

基金：This study was supported by the National Natural Science Foundation of China (Grant No. 32201632), Zhejiang Ten Thousand Talent Scheme-Innovation Leading Talent (Grant No. 2023r5251), East China Coastal Shelter Forest Ecosystem National Positioning Observation Research Station (Grant No. RISFZ-2021-08), and the RUDN University Strategic Academic Leadership Program.

语种：英文

外文关键词：nitrogen and phosphorus fertilization; phosphorus availability; phosphorus cycling indices; phosphorus fractions; soil microbes

摘要：Distinct mechanisms regulate soil P availability under long-term N and P inputs.Microbial biomass and NaOH-Pi sustain soil available P under N fertilization.P fertilization increases soil available P mainly via direct input and labile Pi.Soil phosphorus (P) availability is essential for forest productivity and stability, yet the long-term effects of nitrogen (N) and P fertilization on its mobilization remain unclear. To address this, we conducted a 10-year field experiment in Metasequoia glyptostroboides plantations under a subtropical monsoon climate, assessing the responses of soil chemical property, enzyme activity, microbial biomass, and P cycling indices and fractions to five independent levels each of N (0, 56, 168, 280, 336 kg ha-1) and P (0, 7.8, 31, 93, 155 kg ha-1) fertilization. P fertilization strongly increased available P and inorganic P fractions (Resin-Pi, NaHCO3-Pi, NaOH-Pi), while N fertilization had minimal direct effects. Under N fertilization, available P was primarily influenced by microbial biomass P and carbon, with NaOH-Pi as the dominant supply source. In contrast, under P fertilization, available P was regulated by total P, nitrate nitrogen, and organic carbon, with NaOH-Pi, NaOH-Po, NaHCO3-Pi, and NaHCO3-Po as key fractions. The direct effects of P fertilization, with a pathway coefficient of 0.37, slightly exceeded indirect effects. Overall, our decade-long fertilization trial shows that N fertilization sustains soil P availability chiefly through adaptive microbial processes, whereas P fertilization maintains it largely via direct nutrient inputs.