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• 研究报告 • 上一篇    下一篇

辽东落叶松人工混交林凋落物混合分解特征

李英花1,2,3,周莉1,3*,吴健1,2,3,周旺明1,3,代力民1,3,卢正茂4,黄利亚5#br#   

  1. (1中国科学院森林与管理重点实验室 (沈阳应用生态研究所), 沈阳 110161; 2中国科学院大学, 北京 100049; 3吉林长白山西坡森林生态系统定位观测研究站, 吉林抚松 134506; 4辽宁省森林经营研究所, 辽宁丹东 118002; 5吉林省长白山科学研究院, 吉林安图 133613)
  • 出版日期:2017-11-10 发布日期:2017-11-10

Decomposition of mixed leaf litter of Larix kaempferi plantation in eastern montane region of Liaoning Province.

LI Ying-hua1,2,3, ZHOU Li1,3*, WU Jian1,2,3, ZHOU Wang-ming1,3, DAI Li-min1,3, LU Zheng-mao4, HUANG Li-ya5#br#   

  1. (1 Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110161, China; 2University of Chinese Academy of Sciences, Beijing 100049, China; 3Forest Ecosystem Research Station, Changbai Mountain Western Slope, Fusong 134506, Jilin, China; 4Liaoning Institute of Forest Management, Dandong 118002, Liaoning, China; 5Changbai Mountain Academy of Science, Antu 133613, China).
  • Online:2017-11-10 Published:2017-11-10

摘要: 凋落物分解过程中的养分释放对土壤质量、养分平衡和生产力的可持续维持发挥着重要作用。2015年5月,以辽东山区日本落叶松(Larix kaempferi)红松(Pinus koraiensis)和日本落叶松赤杨(Alnus japonica)人工混交林为研究对象,采用凋落物网袋法将落叶松分别与红松、赤杨叶片凋落物以75∶25、50∶50和25∶75比例混合,研究不同类型、不同比例的混合凋落物对其分解速率以及养分动态变化的影响。结果表明:在单一植物凋落物的分解过程中,赤杨叶片质量损失最高,分解最快;而红松叶片质量损失最低,分解最慢。凋落物混合分解对氮素释放的影响中,3种比例的落叶松与赤杨叶片的混合凋落物均表现出抑制作用,而落叶松与红松叶片混合凋落物(以25∶75比例混合)表现出促进作用。因此,落叶松在与红松、赤杨混合分解时产生了“非加和效应”,并且其分解过程中氮和磷的养分释放状况受混合比例影响。

关键词: 城市与城郊, 相关性, 造林工程, 相对亮温, 缓解热场

Abstract: Nutrient release of leaf litter decomposition plays an important role in sustainable maintenance of soil quality, nutrient balance and plant productivity. In the present study, we investigated the response of leaf litter mixture decomposition rate and nutrient dynamics of Larix kaempferi-Pinus koraiensis mixed plantation and Larix kaempferi-Alnus japonica mixed plantation to three mixing ratios (75∶25, 50∶50, 25∶75) by using litter bag method in May 2015. The results indicated that A. japonica had the highest mass loss, while P. koraiensis had the lowest when considering the decomposition of singlespecies litter. The mixture of L. kaempferi and A. japonica at the 3 mixing ratios had an antagonistic effect on N release, but the leaf litter mixture of 25% L. kaempferi and 75% P. koraiensis showed a promoting effect on N release. Therefore, the leaf litter mixtures of L. kaempferi+A. japonica and L. kaempferi+P. koraiensis showed nonadditive effects, and the N and P releases were influenced by mixing ratios during decomposition.

Key words: relative brightness temperature, mitigating thermal field, afforestation project, correlation, city and suburban area