冀北山区沙地界面层水热因子分布规律研究  

Distribution regularity of hydro-thermal factorsin the interface of sand land in the northern mountain of Hebei Province

作　　者：杨文姬[1] 李一为[1] 赵廷宁[1] 王秀茹[1] 

机构地区：[1]水土保持与荒漠化防治教育部重点实验室北京林业大学水土保持学院,北京100083

出　　处：《中国水土保持科学》2007年第2期46-50,54,共6页Science of Soil and Water Conservation

基　　金：教育部科学技术研究重大;重点项目"接坝山区沙地土地质量数量化评价方法的研究"(104032)

摘　　要：为研究地形变化对水热状况的影响规律,分别于2004年和2005年的5—9月,定位观测河北省小坝子乡不同地形条件下的水热因子。结果表明:地形对水热因子的动态变化影响不显著,但对水热因子的空间分布影响显著。在生长季中,太阳直接辐射的空间分布规律为山顶>阳坡>阴坡;气温、≥0℃和≥10℃积温、地温(5、10和20 cm)、≥0℃和≥10℃土壤积温的空间分布规律均为阳坡>山顶>阴坡;空气湿度的空间分布规律为阴坡>阳坡>山顶;土壤水分的空间分布规律为山顶>阴坡>阳坡。上述水热因子的空间分布规律可为该地区的植被恢复和重建提供重要参考。In order to find out the regularity of hydro-thermal condition affected by topography, hydro-thermal factors at different terrains were observed at Xiaobazi country of Hebei province during growing season in 2004 and 2005. The results showed that the influence of terrains on dynamic variety of hydro-thermal factors is insignificant while significant in spatial distribution of that. During growing season, the distribution regularity of direct solar radiation is that of hilltop 〉 sunny slope 〉 shady slope. The air temperature is that of sunny slope 〉 hilltop 〉 shady slope as well as accumulated temperature of ≥ 0℃ and ≥10℃, ground temperature （5 cm, 10 cm and 20 cm） and accumulated soil temperature of ≥0℃ and ≥10℃. The air humidity was in the order of shady slope 〉 hilltop 〉 sunny slope and the soil moisture was that of hilltop 〉 shady slope 〉 sunny slope. The spatial distribution law of hydro-thermal factors can offer reference to the revegetation in this region.

关 键 词：沙地 界面层 水热因子 冀北山区 

分 类 号：S812[农业科学—草业科学]