密云水库集水区刺槐水源保护林水化学性质研究

A Study on Water Chemical Elements of Robinia Pseudoacacia Water Protection Forest in Miyun Reservoir Watershed

研究了北京密云水库集水区人工刺槐水源保护林水化学性质 ,结果表明 ,不同月份大气降水化学元素含量不同 ,在观测时段内 6月份化学元素含量最高 ,所测定元素加权平均值之和为 12 .0 0 1mg/ L ,各元素含量按大小排序为 Ca>N>K>Mg>Na>P>Fe>Zn>Cu>Mn;大气降水经过林冠层后 ,林内穿透降水和树干茎流中各化学元素含量变化不一 ,但元素总含量增加 ,林内穿透降水化学元素含量之和为 46 .192 mg/ L,树干茎流为 6 1.5 86 mg/ L,分别高于大气降水 34.191mg/ L 和 49.5 85 mg/ L。

WT5,5”BZ]The water chemical elements of Robinia pseudoacacia water protection forest in the Miyun reservoir watershed are studied. The results show that the precipitation contained the total chemical elements amount was 12.00 mg/L in the mainly rainfall period, the highly sample arisen in the June. The consequence of water chemical elements contained as follows: Ca > N > K > Mg > Na > P > Fe > Zn >Cu > Mn. The chemical elements that through fall and stem flow contained was varied in different direction, but as the sum up of the variance quantity that the total contained amounts were increased as comparison with that of the precipitation. The total chemical elements contained of through fall, stem flow was 46.192 mg/L and 61.586 mg/L, respectively, it is 34.191 mg/L and 49.585 mg/L higher than that of precipitation, respectively.