| 姜艳,徐丽萍,杨改河,任广鑫.不同退耕模式林草初夏小气候效应[J].干旱地区农业研究,2007,(2):162~166 |
| 不同退耕模式林草初夏小气候效应 |
| Microclimate effects under different forest-grass rehabilitation of vegetation models in summer |
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| DOI：10.7606/j.issn.1000-7601.2007.02.34 |
| 中文关键词: 小气候特征 不同退耕模式 退耕还林还草 |
| 英文关键词:characters of microclimate different models rehabilitation of vegetation |
| 基金项目:国家重大基础预研项目(2005CCA05300) |
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| 摘要点击次数: 291 |
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| 中文摘要: |
| 通过对安塞县几种不同类型退耕还林还草模式,如混交林、人工灌木林、野生灌木林及林中草地进行了小气候观测,分析了不同退耕模式林草配置下的主要小气候特征,采用平行对比观测法定点定时观测了空气温湿度,土壤温度,水面蒸发并与对照裸地进行了对比。结果表明4种不同退耕模式林草配置在6月高温时期能显著降低空气温度和地表温度的日均值,提高空气湿度和土壤湿度,减少水面蒸发等,具有明显的调节功能。4种不同退耕模式日平均空气温度变化呈不对称的单峰曲线,较对照裸地可以降低0.41℃～1.2℃;0～20 cm各深度的土壤温度基本都是混交林<人工灌木林<野生灌木林<林中草地<对照裸地,混交林内地面最高温度为34.78℃,明显比对照裸地42.54℃低;空气相对湿度日动态呈“U”型变化,其中对照裸地相对湿度日均值最低,混交林日均值最大,为55.2%,比对照裸地高3.95%;水面蒸发量为裸地最大,混交林及灌木林能有效减少水面蒸发,减少量较对照裸地可达50.54%和55.20%。 |
| 英文摘要: |
| According to observations on the microclimate of different models of forest-grass rehabilitation,such as mixed forest,manual shrubbery,wild shrubbery and grass glad,in Ansai experiment station,the main climate factors,such as air temperature,relative humidity,soil temperature,evaporation from water surface and so on,were analyzed.The result shows: the 4 models of forest-grass rehabilitation can significantly reduce average air and soil temperature,increase moisture of both air and soil in June,and have obviously a regulation function.The daily average air temperature changes with a asymmetry one-peak curve,and is 0.41℃～1.2℃ lower than that of bare land.The order of the temperature of 0～20 cm layer soil is: mixed forest |
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