| 邓湘雯,田大伦,康文星,邓裕,吴彬.杉木人工林生态系统可燃物空间分布规律研究[J].火灾科学,2007,16(1):21-25. |
| 杉木人工林生态系统可燃物空间分布规律研究 |
| Studies on the Fuel Distribution Law in Chinese Fir Plantation Ecosystems |
| 投稿时间：2006-07-24 修订日期：2006-11-17 |
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| DOI：10.3969/j.issn.1004-5309.年.期.顺序 |
| 基金项目:湖南省教育厅项目(06C888);国家科技部重点项目(20021220、2004-252)共同资助 |
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| 中文关键词: 杉木人工林 可燃物负荷量 会同生态站 森林防火 |
| 英文关键词:Chinese fir plantation Fuel loading Huitong Ecological Station Forest fire prevention |
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| 中文摘要: |
| 在国家野外科学观测研究站—会同生态站的集水区中设置固定标准地,利用标准地和生物量调查数据,对杉木人工林的可燃物负荷量空间分布规律进行了研究,结果表明:杉木人工林生态系统的自然整枝能力较差,细小可燃物的空间分布均匀,易燃可燃物连续性好;含水率以近地面的最小;11年生的杉木人工林生态系统的枯死枝叶的总负荷量高达0.198t.hm-2,分布于0-1.5 m的空间层中,这种均匀的空间分布规律为树冠火的发生创造了条件,从而加大了杉木人工林生态系统的火险性。建议在杉木人工林生态系统的经营过程中,要加强人工整枝,改变可燃物的空间分布;减少易燃可燃物的数量,降低森林的燃烧性;对于枯死枝叶可采取人工和计划烧除的措施进行清理。 |
| 英文摘要: |
| Based on investigation of biomass in permanent sample plots and sample plots settled in the catchment of the Key National Observation Station—Huitong Ecological Station,the fuel distribution laws were studied by using sample plot and individual trees of the Chinese Fir plantation ecosystem.The natural ability of self thinning was very weak for the Chinese Fir plantation ecosystem,which resulted in an even distribution of the small fuel in the ecosystem.The flammable and burnable material was well continuous distributed from the floor to the crown,and the litter fuel with lower relative moisture content was closed to the ground.The dead leaves and branches fuel loading was approximated to 0.198 t.hm-2 and evenly distributed from 0 to 1.5 m above the ground in the Chinese Fir plantation ecosystem of 11 years old.Therefore,it created favourable conditions for the crown fire and a higher forest fire risk.In consideration of these facts,we made suggestion that: a) it was useful to reinforce pruning of forest to improve the fuel spatial distribution;b) it was useful to reduce the fuel loading to decrease the forest fire risk,and c) it was necessary to take the measures to burn off the dead leaves and branches with artificial factor and prescribed burning in the management of the Chinese Fir plantation ecosystems in the future. |
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