| 北方土石山区典型树种耗水特征及环境影响因子 |
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| 引用本文： | 贾国栋,陈立欣,李瀚之,刘自强,余新晓.北方土石山区典型树种耗水特征及环境影响因子[J].生态学报,2018,38(10):3441-3452. |
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| 作者姓名： | 贾国栋 陈立欣 李瀚之 刘自强 余新晓 |
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| 作者单位： | 北京林业大学水土保持国家林业局重点实验室;北京林业大学北京市水土保持工程技术研究中心;北京林业大学水土保持学院 |
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| 基金项目： | 国家自然科学基金项目（31400615，41401013）；北京林业大学青年教师科学研究中长期项目任务（2015ZCQ-SB-03）；林果业生态环境功能提升协同创新中心（PXM2017_014207_000043） |
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| 摘 要： | 研究北方土石山区植物耗水特征和环境影响因子对于构建稳定的植被生态系统具有重要意义,能够为当地植被恢复策略提供科学指导。在北京林业大学西山试验林场于2016年7月至10月利用热扩散探针的方法,结合同步观测的土壤含水率和气象因子,对刺槐和油松人工混交林进行蒸腾观测和分析。结果表明:(1)尽管刺槐和油松蒸腾的日变化规律相近,但二者蒸腾的季节变化规律不同;(2)两个树种蒸腾与VPD(饱和水汽压差)成顺时针时滞。刺槐蒸腾与太阳辐射成顺时针时滞,油松则成逆时针时滞;(3)二者与大气环境的耦合程度均较高(Ω0.1),其气孔活动能够有效地控制蒸腾;(4)影响植物蒸腾的主要环境因子为太阳辐射(P0.01)、VPD(P0.01)和风速(P0.01),其中由VPD引起的蒸腾量高于太阳辐射;(5)浅层土壤(0—50cm)的水分条件可能并不是影响植物蒸腾的重要因素。研究表明,在实际管理中可以采取调控气孔导度的手段来减少刺槐和油松人工林的耗水量,来降低水分这一人工林成活的限制因子,从而提高造林成活率。
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| 关 键 词： | 北方土石山区 蒸腾特征 环境影响因子 耦合程度 |
| 收稿时间： | 2017/3/31 0:00:00 |
| 修稿时间： | 2018/1/1 0:00:00 |
The effect of environmental factors on plant water consumption characteristics in a northern rocky mountainous area |
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| JIA Guodong,CHEN Lixin,LI Hanzhi,LIU Ziqiang and YU Xinxiao.The effect of environmental factors on plant water consumption characteristics in a northern rocky mountainous area[J].Acta Ecologica Sinica,2018,38(10):3441-3452. |
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| Authors: | JIA Guodong CHEN Lixin LI Hanzhi LIU Ziqiang and YU Xinxiao |
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| Affiliation: | Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;Beijing Engineering Research Center of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China,Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;Beijing Engineering Research Center of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China,School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China,School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China and Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;Beijing Engineering Research Center of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China |
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| Abstract: | |
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| Keywords: | northern rocky mountainous area plant transpiration environmental variables coupling |
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