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生态学杂志 ›› 2020, Vol. 39 ›› Issue (11): 3549-3557.doi: 10.13292/j.1000-4890.202011.024

• 研究报告 • 上一篇    下一篇

毛竹林采伐林窗近地层温度时空分布特征

申景昕1,范少辉1,刘广路1*,陈本学1,吴昌明1,曹碧凤2   

  1. 1国际竹藤中心竹藤科学与技术重点实验室, 北京 100102;2永安市林业局, 福建永安 366000)
  • 出版日期:2020-11-11 发布日期:2021-05-10

Spatiotemporal distribution characteristics of temperature on the surface layer of cutting gap of Phyllostachys edulis forest.

SHEN Jing-xin1, FAN Shao-hui1, LIU Guang-lu1*, CHEN Ben-xue1, WU Chang-ming1, CAO Bi-feng2   

  1. (1Key Laboratory for Bamboo and Rattan, International Center for Bamboo and Rattan, Beijing 100102, China; 2Yong’an Forestry Bureau, Yong’an 366000, Fujian, China).
  • Online:2020-11-11 Published:2021-05-10

摘要: 为探讨采伐毛竹林林窗在不同坡向近地表温度和气温时空分布特征,本研究以福建永安竹林生态定位观测研究站采伐毛竹林为对象,在林窗中心和通过中心的南、北、东、西4个方位设置9个温度观测点,采用Kestrel 3000便携式气象监测仪进行测定每个点位地表温度和1.5 m高度处气温。结果表明:不同坡向采伐林窗区域内温度的空间分布具有明显差异,即温度空间分布的不对称性;同一时间不同坡向高温区域分布在林窗的一侧,2个坡向高温区域的分布方位也具有差异;林窗内地表温度与1.5 m高度气温的差值,促进了林窗内热量传输,进一步增强了林窗内温度分布的空间异质性;2个坡向林窗内温度日变化均为“单峰型”,最高气温发生在中午;同一时间段2个坡向林窗内平均温度差异极显著(P<0.01),总体表现为西坡气温大于北坡。研究表明,采伐毛竹林形成的林窗内,地表温度及1.5 m高度处气温分布具有明显异质性,进而影响竹林林窗内竹笋的出笋规律。该结果为研究采伐毛竹林恢复特征提供了数据资料。

关键词: 毛竹, 采伐, 林窗, 温度, 空间分布

Abstract: We analyzed the temporal and spatial distribution of the near-surface temperature in cutting gaps of moso bamboo (Phyllostachys edulis) forest in different slope directions near the Yong’an Bamboo Forest Ecological Positioning Observation and Research Station in Fujian Province. Nine observation locations were set up in the center of the forest gap and in the four directions of the south, north, east, and west through the center. The Kestrel 3000 portable weather monitor was used to measure surface temperature and air temperature at a height of 1.5 m at each site. The results showed that the spatial distribution of temperature in cutting gaps of different slope directions was significantly different, showing asymmetry in the spatial distribution of temperature. The hightemperature areas in the gaps of two slope directions were distributed on one side of the gap, while the distribution directions of hightemperature areas of two slope directions were also different. The difference between surface temperature and temperature at 1.5 m height promoted heat transfer in forest gaps. The daily variation of temperature in gaps of the two slope directions was singlepeak type, with the highest temperature at noon. The average temperature in gaps of the two slope directions was significantly different (P<0.01), with temperature on the west slope being higher than that on the north slope. Our results indicated that surface temperature and temperature at 1.5 m height within gaps varied with slope directions, positions within gaps and time. Heat transfer in the gaps enhanced environmental heterogeneity, thus affecting bamboo shoot emergence in the gaps. Our results provide evidence for understanding the recovery of logged moso bamboo forest.

Key words: Phyllostachys edulis, logging, forest gap, temperature, spatial distribution.