| 采伐强度对小兴安岭低质林分土壤碳通量的影响 |
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| 引用本文： | 郭辉,董希斌,姜帆.采伐强度对小兴安岭低质林分土壤碳通量的影响[J].林业科学,2010,46(2). |
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| 作者姓名： | 郭辉 董希斌 姜帆 |
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| 作者单位： | 东北林业大学森林持续经营与环境微生物工程黑龙江省重点实验室,哈尔滨,150040 |
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| 基金项目： | 黑龙江省重大攻关项目“低质林结构优化与功能调控技术研究与示范”(GA07B301-05);;东北林业大学研究生创新资助项目 |
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| 摘 要： | 针对择伐后的小兴安岭低质林分,采用LI-8100碳通量自动监测系统在春、夏、秋、冬4个季节对低质林分土壤碳通量进行观测,运用统计分析方法,分析采伐强度对土壤碳通量、土壤温度与湿度的影响。结果表明:采伐区的土壤碳通量高于对照区,随采伐强度的增加土壤碳通量呈现波动性,从采伐强度22%～47%,碳通量逐渐减小,之后趋于平稳,春、夏、秋、冬4个季节土壤碳通量的最大值出现在低度和中度采伐强度林分条件下;随采伐强度增加土壤温度增加,土壤湿度减少,土壤碳通量与距地表10cm处的土壤温度的关系符合指数模型,土壤碳通量与土壤湿度的关系符合一元二次模型;从标准化回归方程看出,土壤碳通量主要由土壤温度与湿度共同影响,且土壤湿度对碳通量的影响大于土壤温度的影响。采伐强度与土壤碳通量具有负相关性,二者的关系为双曲线。
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| 关 键 词： | 低质林 采伐强度 土壤碳通量 土壤温度 土壤湿度 |
Impact of Cutting Intensity on Soil Carbon Flux in Low-Quality Forest Stands of Lesser Khingan Range |
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| Guo Hui,Dong Xibin,Jiang Fan.Impact of Cutting Intensity on Soil Carbon Flux in Low-Quality Forest Stands of Lesser Khingan Range[J].Scientia Silvae Sinicae,2010,46(2). |
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| Authors: | Guo Hui Dong Xibin Jiang Fan |
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| Institution: | Key Laboratory of Forest Sustainable Management and Environmental Microorganism Engineering of Heilongjiang Province/a>;Northeast Forestry University Harbin 150040 |
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| Abstract: | In the spring,summer,autumn and winter,for the low-quality forest stands of Lesser Khingan Range after selective cutting,the soil CO_2 flux of the low-quality forest stands was observed by the LI-8100 CO_2 flux automatic monitoring system. The influence of cutting intensity on the soil CO_2 flux,soil temperature and moisture was analyzed using methods of statistical analysis. The results showed that the soil CO_2 flux in the selective-cutting zone was higher than that in the check zone,and with the increase... |
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| Keywords: | low-quality forest stands cutting intensity soil CO_2 flux soil temperature soil moisture |
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