栓皮栎水源林林木耗水尺度扩展方法研究

编号 zgly0000340128

文献类型 期刊论文

文献题名 栓皮栎水源林林木耗水尺度扩展方法研究

学科分类 220.40;防护林学

作者 王华田  邢黎峰  马履一  孙鹏森 

作者单位 山东农业大学林学院泰安271018  北京林业大学资源与环境学院北京100083  中国林业科学研究院森林生态环境与保护研究所北京 

母体文献 林业科学 

年卷期 2004,40(6)

页码 170-175

年份 2004 

分类号 S727.210.1  S715.4 

关键词 栓皮栎  水源保护林  林木耗水量  林地水量平衡 

文摘内容 Single-tree's sapwood scattering style and diameter classes' diurnal water consumption rhythm were studied in a 48 years old Quercus variabilis stand at the east hill slope, located in the Forest Research Station of Beijing Forestry University in the water conservation area in Beijing (39°54'N, 116°28' E). Results showed that relation between tree's sapwood area and diameter at breast height (DBH) was significant. Single-tree's daily water consumption ascended as DBH and sapwood area increased,and related significantly, Daily water consumption of different diameter class in September ascended steeply from the early morning and got the peak around 11:00 pm, and then descended till 18:00 when it got the valley slowly. Three-dimension model of daily-accumulated water consumption was acquired by scaling-up method from the typical Richards model and characteristic parameters of daily stand water consumption course were calculated from modulated Richards equation derivative:Wditj=(-7.147+1.174^di)[1-(-3025.937+di^2.175)e(-0.011tj)]^1/(1-di^0.242)(R=0.9858)。