鼎湖山针阔混交林土壤热状况研究 |
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| 出 版 社：华南农业大学学报 |
| 发表时间：2006 |
| 台 站：
鼎湖山森林生态系统定位研究站
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| 作 者：尹光彩，王旭，周国逸，张德强 |
| 点 击 率：5043 |
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| 关 键 字：鼎湖山；针阔混交林；土壤热状况 |
| 摘 要：选取2003年1月1日一12月31日的土壤热状况实测数据，探讨了鼎湖山针阔混交林各层次土壤温度、土壤热通量及与净辐射的关系．结果表明：随土层深度的增加，土壤温度日变化振幅越来越小，40cm深度处土壤温度几乎没有明显的日变化；越接近地表，土壤温度月变化越剧烈；不同时间尺度上不同深度处土壤温度与净辐射之间存在极显著的线性相关关系(P<0.0001)；5cm深度处土壤热通量振幅明显小于表层，且日变化节律也延滞0.5—1.0 h；表层土壤热通量对冠层净辐射的反馈延滞约2.5 h，而5cm深度处土壤热通量则延滞3.5 h，同时净辐射与表层土壤热通量的相关性更为密切．
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| 关 键 字(英文)：Dinghushan；coniferous and broad—leaved mixed forest；soil thermal conditions |
| 摘 要(英文)：Based on the soil thermal measurements from Jan．1st to Dec．31th，2003，the soil tempera—tures,soil therm al fluxes,the relationship between soil temperatures and net radiation，soil therm al flu—xes and net radiation of coniferous and broad．1eaved mixed forest in Dinghushan Reserve were discussed in this paper．The following results were gotten：(1)The diurnal changes of soil temperature decreased with the depth of soil layers，and no obvious diurnal changes of soil temperature was detected at the depth
of 40cm．(2)The monthly soil temperature varied acutely at the soil surface layers．(3)There existed significant linear relationship(P<0．000 1)between soil temperature and net radiation at diferent tem—poral scales．(4)The changes of thermal fluxes swings at 5cm soil layer were much milder than that of the surface soil layer，and the diurnal changes oftherm al fluxes at 5cm soil layer lagged behind the sur—face soil about 0.5-1.0h．(5)The feedback of the surface soil heat fluxes lagged 2.5h behind the net radiation．while the soil heat fluxes at 5cm depth lagged 3.5 h．The soil heat fluxes of the surface soil were more closely related to the net radiation． |
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 鼎湖山针阔混交林土壤热状况研究.pdf |
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