北京密云水库集水区板栗林水化学元素性质研究  

Properties of water chemical elements of Castanea mollissima forest in Miyun reservoir watershed.

作　　者：刘世海[1] 余新晓[1] 于志民[2] 

机构地区：[1]北京林业大学水土保持学院,北京100083 [2]北京市林业局,北京100029

出　　处：《北京林业大学学报》2001年第2期12-15,共4页Journal of Beijing Forestry University

基　　金："九五"国家攻关子专题!"华北土石山区水源保护林综合配套技术与示范"(96 0 0 7 0 1 0 2 );中德合作密云监评项目

摘　　要：对北京密云水库集水区板栗林水化学性质研究表明 :在研究期间 ,不同月份大气降水化学元素的含量变化范围较大 ,以加权平均值之和来计 ,6月份化学元素含量最高 ,观测时段内所测定元素加权平均值之和为 12 0 0 11mg L ,各元素含量按大小排序为Ca >N >K >Mg >Na >P >Fe>Zn >Cu >Mn ;大气降水经过林层后 ,林内穿透降水和树干茎流中各化学元素含量变化基本一致 ,大多数元素含量增加 ,林内穿透降水化学元素含量之和为 17 110 5mg L ,树干茎流为 35 5 0 74mg L ,比大气降水分别高出 5 10 94mg L和 2 3 5 0 6 3mg L .The paper studies on the water chemical elements of Castanea mollissima forest in the Miyun reservoir watershed, Beijing. The total concentration of chemical elements in precipitation was 12.001 1 mg/L, and it greatly varied in the main rainfall periods. The sequence of the water chemical elements contentration in precipitation was Ca > N > K > Mg > Na > P > Fe > Zn > Cu > Mn. The chemical elements of through-fall and stem-flow varied in same way, most of the chemical elements concentration were increased. Through-fall and stem-flow total chemical element concentration was 20.613 5 mg/L and 73.323 5 mg/L, respectively, they increased 8.162 4 mg/L and 62.312 4 mg/L than those in precipitation, respectively.

关 键 词：大气降水 穿透降水 树干茎流 水源保护林 板栗林 化学元素 化学性质 密云水库 集水区 

分 类 号：S664.201[农业科学—果树学] S715.1[农业科学—园艺学]