植物生态学报 ›› 2017, Vol. 41 ›› Issue (1): 14-21.DOI: 10.17521/cjpe.2016.0201

所属专题: 中国灌丛生态系统碳储量的研究

• 研究论文 • 上一篇    下一篇

中国北方温带灌丛生态系统碳、氮、磷储量

郭焱培1, 杨弦1, 安尼瓦尔·买买提2, 刘鸿雁1, 马文红3, 于顺利4, 唐志尧1,*()   

  1. 1北京大学城市与环境学院, 北京 100871
    2中国科学院新疆生态与地理研究所, 乌鲁木齐 830011
    3内蒙古大学生命科学学院, 呼和浩特 010021
    4中国科学院植物研究所植被与环境变化国家重点实验室, 北京 100093
  • 收稿日期:2016-06-14 接受日期:2016-11-10 出版日期:2017-01-10 发布日期:2017-01-23
  • 通讯作者: 唐志尧
  • 作者简介:* 通信作者Author for correspondence (E-mail:sunzhiqiang1956@sina.com)
  • 基金资助:
    中国科学院战略先导性科技专项(XDA05050301)

Storage of carbon, nitrogen and phosphorus in temperate shrubland ecosystems across Northern China

Yan-Pei GUO1, Xian YANG1, Anwar MOHHAMOT2, Hong-Yan LIU1, Wen-Hong MA3, Shun-Li YU4, Zhi-Yao TANG1,*()   

  1. 1College of Urban and Environmental Science, Peking University, Beijing 100871, China

    2Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi 830011, China;

    3College of Life Sciences, Inner Mongolia University, Hohhot 010021, China

    4State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
  • Received:2016-06-14 Accepted:2016-11-10 Online:2017-01-10 Published:2017-01-23
  • Contact: Zhi-Yao TANG
  • About author:KANG Jing-yao(1991-), E-mail: kangjingyao_nj@163.com

摘要:

研究生态系统碳(C)、氮(N)、磷(P)密度分布和储量对于理解生态系统碳循环和养分循环的机制和规律有重要意义。现有的相关研究多集中在森林和草地生态系统。在中国北方, 灌丛生境水分和土壤条件差异很大, 这为研究生态系统C、N、P密度与储量的分布格局提供了良好条件。该研究调查了433个中国北方温带灌丛样地的生物量、凋落物以及土壤等组分的有机C及N、P含量, 据此计算出中国北方灌丛生态系统有机C及N、P密度和储量。结果表明: 中国北方灌丛平均生态系统有机C及N、P密度分别为69.8 Mg·hm-2、7.3 Mg·hm-2、4.2 Mg·hm-2。其中, 生物量C、N、P密度分别为5.1 Mg·hm-2、11.5×10-2 Mg·hm-2、8.6×10-3 Mg·hm-2, 生物量C、N、P密度与降水和土壤养分关系显著; 凋落物C、N、P密度分别为1.4 Mg·hm-2、3.8×10-2 Mg·hm-2、2.5×10-3 Mg·hm-2, 凋落物C、N、P密度与温度和降水关系显著; 1 m深土壤的平均有机C及N、P密度分别为64.0 Mg·hm-2、7.1 Mg·hm-2、4.2 Mg·hm-2, 土壤有机C及N密度与温度和降水关系显著。中国北方灌丛生态系统的总有机C及N、P储量分别为1.7 Pg、164.9 Tg、124.8 Tg。其中生物量C、N、P储量分别为128.4 Tg、3.1 Tg、0.2 Tg; 凋落物C、N、P储量分别为8.4 Tg、0.45 Tg、0.027 Tg; 土壤是最大的C、N、P库, 1 m深土壤有机C及N、P储量分别为1.6 Pg、161.3 Tg、124.6 Tg。

关键词: 碳, 氮, 磷, 储量, 密度, 灌丛, 中国北方

Abstract:

Aims Studying storage of carbon (C), nitrogen (N) and phosphorus (P) in ecosystems is of significance in understanding carbon and nutrient cycling. Previous researches in ecosystem C, N and P storage have biased towards forests and grasslands. Shrubland ecosystems encompass a wide gradient in precipitation and soil conditions, providing a unique opportunity to explore the patterns of ecosystem C, N and P storage in relation to climate and soil properties.
Methods We estimated densities and storage of organic C, N and P of shrubland ecosystems in Northern China based on data from 433 shrubland sites.
Important findings The main results are summarized as follows: the average organic C, N and P densities in temperate shrubland ecosystems across Northern China were 69.8 Mg·hm-2, 7.3 Mg·hm-2 and 4.2 Mg·hm-2, respectively. The average plant C, N and P densities were 5.1 Mg·hm-2, 11.5 × 10-2 Mg·hm-2 and 8.6 × 10-3 Mg·hm-2, respectively, and were significantly correlated with precipitation and soil nutrient concentrations. The average litter C, N and P densities were 1.4 Mg·hm-2, 3.8 ×10-2 Mg·hm-2, 2.5 ×10-3 Mg·hm-2 and were significantly correlated with temperature and precipitation. The average soil organic C, N and P densities in the top 1 m were 64.0 Mg·hm-2, 7.1 Mg·hm-2 and 4.2 Mg·hm-2, respectively and the former two were significantly correlated with temperature and precipitation. The total organic C, N and P storage of shrublands in Northern China were 1.7 Pg, 164.9 Tg and 124.8 Tg, respectively. The plant C, N and P storage were 128.4 Tg, 3.1 Tg and 0.2 Tg, respectively. The litter C, N and P storage were 8.4 Tg, 0.45 Tg, 0.027 Tg, respectively. Soil is the largest C, N and P pool in the studied area. The soil organic C, N and P storage in the top 1 meter were 1.6 Pg, 161.3 Tg and 124.6 Tg, respectively.

Key words: carbon, nitrogen, phosphorus, storage, density, shrublands, Northern China