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长期施氮与减水处理对红松和蒙古栎根际磷浓度的影响

杨建华1,2,王芳1,2,张军辉1**,岳琳艳1,2,朱保坤3,耿世聪1,2,王秀秀4,韩士杰1   

  1. 1森林与土壤生态国家重点实验室, 中国科学院沈阳应用生态研究所, 沈阳 110016; 2中国科学院大学, 北京 100049; 3东北师范大学, 长春 130024; 4长白山森林生态系统定位研究站, 吉林安图 133613)
  • 出版日期:2015-10-10 发布日期:2015-10-10

Influence of long-term nitrogen fertilization and precipitation reduction on rhizospheric phosphorus concentration of Pinus koraiensis and Quercus mongolica.

YANG Jian-hua1,2, WANG Fang1,2, ZHANG Jun-hui1**, YUE Lin-yan1,2, ZHU Bao-kun3, GENG Shi-cong1,2, WANG Xiu-xiu4, HAN Shi-jie1   

  1. (1State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 2University of Chinese Academy of Sciences, Beijing 100049, China; 3Northeast Normal University, Changchun 130024, China; 4The Research Station of Changbai Mountain Forest Ecosystems, Chinese Academy of Sciences, Antu 133613, Jilin, China)
  • Online:2015-10-10 Published:2015-10-10

摘要:

磷素循环作为陆地生态系统对全球变化响应的关键过程之一,其研究还存在很大的不确定性。本文以长白山阔叶红松林为研究对象,采用长期野外施氮降水控制实验手段,分析了施氮和降水控制第6年优势树种红松和蒙古栎根际土壤全磷和有效磷浓度的变化。结果显示:长期施氮显著提高根际土壤全磷浓度7.4%~10.9%,两个树种根际土壤全磷浓度差异不显著;长期施氮显著提高根际土壤有效磷浓度,红松和蒙古栎根际土壤有效磷浓度分别提高25.1%和32.4%;蒙古栎根际土壤有效磷浓度比红松高31.8%~84.1%。减水处理对红松和蒙古栎根际土壤全磷、有效磷浓度影响均不显著。
 

关键词: 气候变化, LPJ-GUESS模型, 油松, 净初级生产力

Abstract: Understanding changes in soil phosphorus concentration is critical to predict the influence of longterm environmental change on forest ecosystems. By measuring total phosphorus and available phosphorus concentrations in rhizospheric soil of Pinus koraiensis and Quercus mongolica in the sixthyear nitrogen and precipitation manipulation experiment, we intended to study the influence of longterm nitrogen deposition and precipitation variation. The results showed that longterm nitrogen fertilization significantly increased the total phosphorus concentration in rhizospheric soil by 7.4%-10.9%, and the influence of tree species on total phosphorus concentration in rhizospheric soil was not significant. Longterm nitrogen fertilization significantly increased the available phosphorus concentration in rhizospheric soil of P. koraiensis and Q. mongolica by 25.1% and 32.4%, respectively. The available phosphorus concentration in rhizospheric soil of Q. mongolica was 31.8%-84.1% higher than that of P. koraiensis. The reduction in precipitation had no significant effects on both total phosphorus and available phosphorus concentrations in rhizospheric soil.

 

Key words: Pinus tabuliformis, LPJ-GUESS model, climate change., net primary productivity