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应用生态学报 ›› 2017, Vol. 28 ›› Issue (8): 2452-2460.doi: 10.13287/j.1001-9332.201708.026

• 目次 • 上一篇    下一篇

中国森林凋落量时空分布特征

申广荣1,2,3, 项巧巧1, 陈冬梅1, 吴裕1, 刘春江1,2,3*   

  1. 1上海交通大学农业与生物学院/低碳农业研究中心, 上海 200240
    2农业部都市农业南方重点实验室, 上海 200240
    3国家林业局上海城市森林生态系统国家定位观测研究站, 上海 200240
  • 收稿日期:2017-01-24 发布日期:2017-08-18
  • 通讯作者: * E-mail: 1805442160@qq.com; chujliu@sjtu.edu.cn
  • 作者简介:申广荣,女,1964年生,博士,副教授.主要从事3S技术及其生态应用研究.E-mail:sgrong@sjtu.edu.cn
  • 基金资助:
    本文由中国科学院战略性先导科技专项(XDA0505020)、国家自然科学基金项目(71333010)和上海交通大学农工交叉项目(Agri-X2015004)资助

Spatio-temporal distribution characteristics of forest litterfall in China

SHEN Guang-rong1,2,3, XIANG Qiao-qiao1, CHEN Dong-mei1, WU Yu1, LIU Chun-jiang1,2,3*   

  1. 1School of Agriculture and Biology/Research Centre for Low-Carbon Agriculture, Shanghai Jiaotong University, Shanghai 200240, China
    2Ministry of Agriculture Key Laboratory of Urban Agriculture South, Shanghai 200240, China
    3Shanghai Urban Forest Research Station, State Forestry Adminstration, Shanghai 200240, China
  • Received:2017-01-24 Published:2017-08-18
  • Contact: * E-mail: 1805442160@qq.com; chujliu@sjtu.edu.cn
  • Supported by:
    This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA0505020), the National Natural Science Foundation of China (71333010)and the Interdiscipline Program of Agriculture and Engineering of Shanghai Jiaotong University (Agri-X2015004)

摘要: 通过构建全国尺度上森林叶凋落量和总凋落量与年平均温度、年平均降雨量和实际蒸散量的关系模型,应用地统计学分析方法,并结合遥感解译的森林覆盖信息,分析2001、2006和2012年中国森林叶凋落量和总凋落量的空间分布及其变异格局.结果表明: 与年平均温度和降雨量相比,区域尺度上实际蒸散量对森林叶凋落量和总凋落量有更好的解释预测关系;分布于中南地区的常绿阔叶林的年凋落量最高,为636.2 g·m-2,分布于东北地区的温带落叶阔叶林的年凋落量范围为339~385 g·m-2,其中,森林叶凋落量约占总凋落量的70%.2001、2006和2012年,全国森林凋落总量分别为801、865和1032 Tg,呈明显增长趋势,而基于遥感图像解译的森林年覆盖率分别为18%、20%和24%,呈增长趋势.我国人工林面积的迅速增加和林分生长,极大影响了森林凋落物量及其动态变化,进而对森林生态系统物质循环产生重要影响.

Abstract: In this study, the relationship models at national scale between forest litterfall (and leaf litterfall) and climatic factors (mean annual mean temperature, MAT; mean annual precipitation, MAP; and actual evapotranspiration, AET) were constructed. The spatial and temporal distribution patterns of forest litterfall and leaf litterfall in 2001, 2006 and 2012 were investigated by using geostatistical analysis combining with forest cover information based on remote sensing interpretation. Results indicated that the variation in litterfall and leaf litterfall were well explained at regional scales by AET than MAT and MAP. Evergreen broadleaf forest distributing mostly in South Central China possessed the highest mean yearly litterfall (636.2 g·m-2), and that of deciduous broadleaf forest in the Northeast of China was between 339-385 g·m-2. The forest leaf litterfall accounted for about 70% of total forest litterfall. The total forest litterfall in China increased from 801 Tg in 2001, and 865 Tg in 2006 to 1032 Tg in 2012, meanwhile, the forest coverage in China also presented an increasing trend, 18% in 2001, 20% in 2006, and 24% in 2012. The rapid increase of plantation area and stand growth in China had a great effect on the forest litterfall and its dynamic change, and the material cycle of forest ecosystem.