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SCI论文目录 |
鹤山人工林的辐射能环境研究 |
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| 出 版 社：生态科学 |
| 发表时间：1997年 01期 |
| 台 站：
鹤山丘陵综合开放试验站
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| 作 者：任海 彭少麟 |
| 点 击 率：5968 |
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| 关 键 字： 辐射能环境 针叶混交林 豆科植物混交林 乡土树种林 鹤山 |
| 摘 要： 对鹤山针叶混交林、以乡土树种为主的阔叶混交林和豆科混交的林冠作用层和林地作用层辐射能等方面进行了研究．在太阳高度角和天气等因素的影响下，全年抵达各林的总辐射月变化基本上都呈双峰曲线，各林的峰值分布于５月和７～９月，谷值分布于２月和６月．由于坡向的影响，东南坡的太阳总辐射最大，平坦地和西坡次之，东坡较小，北坡最小．各林型林冠上直接辐射和散射辐射占各自总太阳辐射量的比例有所不同，但各林林冠上直射所占比例均大于散射所占比例；由于冠层截获的影响，林下散射辐射量则大于直射辐射量．草坡、气象站、豆科林、乡土林和针叶林的林上反射率分别为１７．２％、１８．３％、１０．６％、１１．４％和１３．４％，而后三个林型林内的反射率分别为２８．９％、２５．１％、２１．４％．这种差异是由植物冠层结构、植物器官的光学特性和群落的发育状况等决定．因太阳高度角、天气状况、下垫面状况及坡向的不同，草坡、气象站、针叶林、乡土林和豆科林林冠作用层的净辐射分别为２９１５．６ＭＪ•ｍ－２•ａ－１、２５４７．４ＭＪ•ｍ－２•ａ－１、２５５５．１ＭＪ•ｍ－２•ａ－１、２７３９．２ＭＪ•ｍ－２•ａ－１、２９２２．３ＭＪ•ｍ－２•ａ－１；其透射率分别为４２．３％、３２．６％和２８．８％．这种林下辐射能环境与林下植物入侵者有关；其林冠截获率与叶面积指数呈正相关．同地带的鼎湖山季风常绿阔叶林的冠层结构、光能截获率和净第一性生产力等指标均好于鹤山各人工林群落的相应值．要提高人工林的相应指标可在地面至林冠层入口之间增加利用层 |
| 关 键 字(英文)：radiation components leguminous mixed forest native species mixed forest coniferous mixed forest Heshan |
| 摘 要(英文)：It was measured that radiation components such as gross solar radiation, reflected solar radiation, net radiation, defuse radiation, direct radiation of a leguminous mixed forest, a broad leaf mixed forest and a coniferous mixed forest on Heshan lower subtropical hill, Guangdong, South China. The work concentrated on forest canopy layer and forest floor layer. The main conclusions are as follows:(1) Because of the influence of the angle of the sun and weather, the seasonal changes of solar radiation above canopy were double-peak curve. The monthly maximum value appeared in May and July￣September, but the monthly minimum value appeared in Feburary and June.(2) The values of solar energy entering forests were different because of the influence of slope direction. In general, the solar radiation value decreased from southeast, west, east to north facing slopes.(3) The defuse and direct radiation above canopy of three forests were different. The direct radiation above canopy of the forest was more than the def |
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 鹤山人工林的辐射能环境研究.PDF |
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