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[1]尹明珍 郭婉玑 朱晓敏 张子良 刘庆 尹华军**.氮沉降下西南亚高山针叶林生长的养分限制特征[J].应用与环境生物学报,2021,27(03):1-10.[doi:10.19675/j.cnki.1006-687x.2020.07040]
　YIN Mingzhen,Guo Wanji,ZHU Xiaomin,et al.Nutrient limiting characteristics of subalpine coniferous forests under nitrogen deposition in Southwest mountain, China[J].Chinese Journal of Applied & Environmental Biology,2021,27(03):1-10.[doi:10.19675/j.cnki.1006-687x.2020.07040]
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氮沉降下西南亚高山针叶林生长的养分限制特征()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
27卷
期数:
2021年03期
页码:
1-10
栏目:
研究论文
出版日期:
2021-06-25

文章信息/Info

Title:
Nutrient limiting characteristics of subalpine coniferous forests under nitrogen deposition in Southwest mountain, China
作者:
尹明珍1; 2 郭婉玑1; 2 朱晓敏1 张子良1; 3 刘庆1 尹华军1**
1中国科学院成都生物研究所,中国科学院山地生态恢复与生物资源利用重点实验室,生态恢复与生物多样性保育四川省重点实验室 成都 610041
2中国科学院大学 北京 100049
3克莱姆森大学,美国南卡罗来纳州 克莱姆森 29670
Author(s):
YIN Mingzhen1; 2;  Guo Wanji1; 2;  ZHU Xiaomin1;  ZHANG Ziliang1; 3;  LIU Qing1 & YIN Huajun1**
1 CAS Key Laboratory Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
3 Clemson University, Clemson 29670, South Carolina, USA
关键词:
养分限制; N: P化学计量; 亚高山针叶林; N沉降
Keywords:
nutrient limitation ;  N: P stoichiometry;  subalpine coniferous forests ;  N deposition
DOI:
10.19675/j.cnki.1006-687x.2020.07040
摘要:
长期氮（N）沉降及其诱导的N-P养分平衡性对森林生长与生产力的生态反馈效应已成为当前森林生态学研究的前沿与热点，但目前大多研究主要基于已有文献数据整合分析，而缺乏野外原位系统性研究与试验证据。以西南亚高山两种典型人工针叶林——云杉（Picea asperata）林和华山松（Pinus armandii）林为对象，通过野外原位N添加模拟大气N沉降，从叶片养分状态和生理特征变化的角度研究了N沉降下该区域树木生长的养分限制特征。结果表明：（1）N添加显著降低了两种人工林叶片P含量，导致云杉和华山松叶片N: P比分别比对照增加了9.9%和5.8%，表明N添加在一定程度上驱动了两种林分生长的P养分限制，且云杉林P养分受限程度更明显；（2）N添加显著降低了云杉林叶片NRE/PRE比，而对华山松林无显著影响，表明N添加下云杉人工林生长受到了明显的P养分限制；（3）N添加显著降低了两种人工林叶片各P组分含量，而显著提高了叶片酸性磷酸酶活性。上述结果从叶片养分状态和生理特征两方面均表明，N沉降导致亚高山森林树木生长受到不同程度的P养分限制，且云杉人工林P受限程度比华山松林更为明显，推测N沉降驱动的林分P受限程度可能与两种林分土壤养分初始状况有关；本研究结果可为全球气候变化下森林的适应性管理提供重要的科学依据。
Abstract:
The effect of long-term nitrogen (N) deposition and the induced N-P nutrient balance on the ecological feedback of forest growth and productivity has become a research frontier and hot spot. However, most of the current studies are based on the data integration of existing literature, and lack of systematic field research and related empirical evidence. In this study, two typical artificial subalpine coniferous forests in southwest China, Picea asperata plantation and Pinus armandii plantation, were used as objects . By adding N in situ in the field to simulate atmospheric N deposition, the nutrient limiting characteristics of tree growth in this region under N deposition were verified based on the leaf nutrient status and physiological characteristics. The results showed that: 1) The addition of N had significantly decreased the foliar P concentration in the two plantations , resulting in an increase of foliar N: P ratio by 9.9% and 5.8% over the control in P. asperata plantation and P. armandii plantation respectively, which indicated that N addition drove P nutrient limitation in both plantations growth to a certain extent , and the degree of P nutrient limitation was more severe in P. asperata plantation; 2) N addition significantly reduced the NRE/PRE ratio of P. asperata leaves , but had no significant effect on P. armandii leaves. The results showed that the growth of P. asperata plantation under N addition was significantly restricted by P nutrient ; 3) The N addition significantly reduced the concentration of foliar P fraction s, and markedly increased the foliar acid phosphatase activity in both plantations . Collectively, based on the interpretation of the leaf nutrient status and physiological characteristics, this study showed that N deposition induced P nutrient limitation to the growth of subalpine forest trees to different degrees , and the degree of P nutrient limitation was more severe in P. asperata plantation . We speculated that the P nutrient limitation degree of stand driven by N deposition might be related to the initial soil nutrient status of the two stands. The findings of this study provide an important scientific basis for forest adaptive management under global climate change.

相似文献/References:

[1]邱岭军,何宗明,胡欢甜,等.滨海沙地不同树种碳氮磷化学计量特征[J].应用与环境生物学报,2017,23(03):555.[doi:2016.08017]
　QIU Lingjun,HE Zongming,HU Huantian,et al.Stoichiometric characteristics of carbon, nitrogen, and phosphorus in different tree species in a sandy coastal plain area[J].Chinese Journal of Applied & Environmental Biology,2017,23(03):555.[doi:2016.08017]
[2]邱岭军,胡欢甜,林宇,等.滨海沙地不同林龄尾巨桉内吸收率及其C:N:P化学计量特征[J].应用与环境生物学报,2017,23(04):739.[doi:10.3724/SP.J.1145.2016.11028]
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备注/Memo

备注/Memo:

收稿日期 Received: 2020-07-21 接受日期 Accepted: 2020-08-20
中国科学院前沿科学重点研究项目（QYZDB-SSW-SMC023）、国家自然科学基金面上项目（31872700、31670449）、四川省重点研发项目（2018SZDZX0035）资助
**通讯作者Corresponding author (E-mail: yinhj@cib.ac.cn)
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更新日期/Last Update: 2020-09-10