模拟氮沉降对五角枫幼苗生长的影响

肖迪; 王晓洁; 张凯; 康峰峰; 何念鹏; 侯继华

doi:10.13332/j.1000-1522.20150079

模拟氮沉降对五角枫幼苗生长的影响

doi: 10.13332/j.1000-1522.20150079

1.
1 北京林业大学森林资源与生态系统过程北京市重点实验室;
2.
2 中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室

基金项目:

中央高校基本科研业务费专项(TD2011-07)、国家自然科学基金青年基金项目(31000263)、国家自然科学基金项目(31470506)、中国科学院地理科学与资源研究所可桢杰出青年学者项目(2013RC102)。

详细信息

作者简介:
肖迪。主要研究方向:植物功能性状对环境响应。Email:xiaodi@bjfu.edu.cn 地址:100083 北京市海淀区清华东路35号北京林业大学林学院。责任作者: 侯继华,副教授。主要研究方向:生物多样性、植物功能性状。Email:houjihua@bjfu.edu.cn 地址:同上。

肖迪。主要研究方向:植物功能性状对环境响应。Email:xiaodi@bjfu.edu.cn 地址:100083 北京市海淀区清华东路35号北京林业大学林学院。责任作者: 侯继华,副教授。主要研究方向:生物多样性、植物功能性状。Email:houjihua@bjfu.edu.cn 地址:同上。

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出版历程
- 收稿日期: 2015-03-20
- 刊出日期: 2015-10-31

Effects of simulated nitrogen deposition on growth of Acer mono seedlings.

1.
1 Key Laboratory for Forest Resources & Ecosystem Processes, Beijing Forestry University, Beijing, 100083,P. R. China;
2.
2 Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing ,100101, P. R. China.

摘要

摘要: 为了解五角枫幼苗的生长及地上、地下生物量分配等对模拟氮沉降的响应,以北京(BJ)、山西(SX)、内蒙古(NMG)3个不同种源的五角枫幼苗为研究材料,设计5个氮水平:对照(N0,0 kg/(hm2a),以N计,下同);低氮(N1,15 kg/(hm2a));中氮(N2, 25 kg/(hm2a) );高氮(N3,50 kg/(hm2a));过饱和氮(N4, 150 kg/(hm2a))。分析不同施氮水平下五角枫幼苗的基径、苗高、月生长量、生物量及各部分生物量分配比例的差异。结果表明:1)模拟氮沉降对山西和内蒙古种源五角枫幼苗基径、北京和内蒙古种源的苗高以及北京和山西种源的苗高月生长量均产生了显著影响;2)模拟氮沉降对北京种源五角枫幼苗生物量的影响较小,而随施氮浓度升高,山西、内蒙古种源五角枫幼苗的生物量均呈先增后减的显著变化趋势,山西种源幼苗的生物量在中氮水平达到最大值,而内蒙古种源则在高氮水平达到最大值;3)模拟氮沉降对于3个种源五角枫幼苗的生物量配比均产生了显著的影响,随着施氮浓度的升高,五角枫幼苗的根质量比(RMR)、根冠比(RSR)均有下降趋势,而茎质量比(SMR)、茎叶比(SLR)显著上升,说明其对茎结构的投资明显加大了,而对根和叶结构的投资则相对减少;4)分析五角枫幼苗的变异来源发现,基径(D)、苗高(H)、各部分生物量均与模拟氮沉降处理和种源2个因素存在密切关联,而生物量配比中只有SMR、叶质量比(LMR)和SLR与模拟氮沉降处理这1个因素存在显著的相关性,说明生物量配比的变化与种源的差异关联不大,但与环境中氮的输入量有较大的关系。
- 模拟氮沉降 /
- 生长指标 /
- 生物量 /
- 生物量分配 /
- 五角枫幼苗
Abstract: To evaluate the effects of simulated nitrogen deposition on growth and biomass allocation of Acer mono seedlings, we collected 3-year-old seedlings from three provenances, Beijing (BJ), Shanxi (SX) and Inner Mongolia (NMG) planted in a common garden. Five nitrogen fertilization treatments were set: control (N0, 0 kg/(haa)), low-N (N1, 15 kg/(haa)), medium-N (N2, 25 kg/(haa)), high-N (N3, 50 kg/(haa)) and supersaturated-N (N4, 150 kg/(haa)). The differences in stem basal diameter (D), seedling height (H), biomass and the biomass allocation ratio between treatments were examined. The results showed that: 1) simulated nitrogen deposition significantly improved D, H, and monthly growth of D and H (D, H) of seedlings of different provenances; 2) simulated nitrogen deposition had little effect on the biomass of seedlings from BJ, while the biomass of seedlings from SX and NMG had obvious response to the addition of nitrogen, and the maximum values showed in N2 for SX seedlings and N3 for NMG seedlings; 3) simulated nitrogen deposition had significant influence on seedling biomass allocation: RMR and RSR decreased while SMR and SLR increased, indicating that seedlings cut down the investment on the development of root and leaf, but reinforced on stem construction; 4) the analysis of sources of variation showed that the variation of D, H and biomass of different organs related closely with both nitrogen treatment and provenance, but SMR, LMR and SLR were only associated with nitrogen treatment and independent of provenance.
- simulated nitrogen deposition /
- growth index /
- biomass /
- biomass allocation /
- Acer mono seedlings

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