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应用生态学报 ›› 2018, Vol. 29 ›› Issue (7): 2156-2162.doi: 10.13287/j.1001-9332.201807.019

• 研究报告 • 上一篇    下一篇

亚热带不同植被类型土壤磷组分特征及其影响因素

曾晓敏1,2, 范跃新1,2, 林开淼2,3, 袁萍1,2, 赵盼盼1,2, 陈怡然1,2, 徐建国3, 陈岳民1,2*   

  1. 1福建师范大学地理科学学院, 福州 350007;
    2湿润亚热带山地生态国家重点实验室培育基地, 福州 350007;
    3福建戴云山国家级自然保护区管理局, 福建泉州 362500
  • 收稿日期:2018-01-02 出版日期:2018-07-18 发布日期:2018-07-18
  • 通讯作者: *E-mail: ymchen@fjnu.edu.cn
  • 作者简介:曾晓敏, 女, 1993年生, 硕士研究生. 主要从事森林生态与环境研究. E-mail: 1518417418@qq.com
  • 基金资助:

    本文由国家自然科学基金项目(31670620)、福建省科技厅项目(2016R1032-2)和海峡联合基金项目(U1505233)资助.

Characteristics of soil phosphorus fractions of different vegetation types in subtropical forests and their driving factors.

ZENG Xiao-min1,2, FAN Yue-xin1,2, LIN Kai-miao2,3, YUAN Ping1,2, ZHAO Pan-pan1,2, CHEN Yi-ran1,2, XU Jian-guo3, CHEN Yueh-min1,2*   

  1. 1School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China;
    2Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China;
    3Daiyun Mountain National Nature Reserve Administration Bureau, Quanzhou 362500, Fujian, China
  • Received:2018-01-02 Online:2018-07-18 Published:2018-07-18
  • Contact: *E-mail: ymchen@fjnu.edu.cn
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (31670620), the Fujian Provincial Department of Science and Technology Project (2016R1032-2), and the Strait Union Fund Project (U1505233).

摘要: 研究了戴云山常绿阔叶林、针阔混交林和针叶林3种植被类型土壤磷组分、微生物生物量磷以及酸性磷酸单酯酶(ACP)和磷酸双酯酶(PD)的活性.结果表明: 3种植被类型土壤易分解态磷仅占总磷(TP)的1.0%~4.5%,且碳(C)与有机磷(Po)的比例>200,表明本研究区受到磷限制.Po是土壤磷库的主要组分,在淋溶层(A层)和淀积层(B层)土壤中分别占TP的44.8%~47.1%和28.6%~30.6%.冗余分析表明,A层土壤磷组分主要受PD影响,而B层主要受ACP调控,且PD和ACP均与Po呈显著负相关.亚热带地区3种植被类型土壤均缺磷,PD和ACP对有机磷的分解可能是该地区森林生态系统对磷限制的适应机制.

Abstract: Soil P fraction, microbial biomass P (MBP), and activities of acid phosphomonoesterase (ACP) and phosphodiesterase (PD) were analyzed under evergreen broad-leaved forest, mixed forest and coniferous forest in Daiyun Mountains. The results showed that labile-P comprised only 1.0%-4.5% of soil total phosphorus (TP). The ratio of soil carbon to organic phosphorus (C:Po) was >200, indicating phosphorus limitation across the three vegetation types. Organic phosphorus (Po) was a significant fraction of soil P, which accounted for 44.8%-47.1% and 28.6%-30.6% of TP in A and B horizons, respectively. Results from the redundancy analysis showed that the changes in P fractions were mainly driven by PD in the A horizon and by ACP in the B horizon. Moreover, the activities of PD and ACP had a significant negative correlation with Po. The results suggested that phosphorus deficiency occurred in the three vegetation types, and that PD and ACP could play major roles in the depletion of soil Po in response to phosphorus limitation in subtropical forests.