【作者】 杨钙仁； 雷世满； 黄承标； 张秀青； 彭军； 陈桂经；

【Author】 YANG Gai-ren1,LEI Shi-man1,HUANG Cheng-biao1,ZHANG Xiu-qing1,PENG Jun1,CHEN Gui-jing2(1.Forestry College of Guangxi University,Nanning 530004,China;2.Gaofeng state-owned forest farm of Guangxi,Nanning 530001,China)

【机构】 广西大学林学院； 广西国营高峰林场；

【摘要】 为探讨桉树人工林冠层对降雨水质的影响过程与特征,采用林内雨收集系统收集水样,研究了6种不同林分人工林对冠层穿透水和树干径流水浊度、色度、pH值、化学需氧量(COD)等的影响。结果表明,在淋溶的第一阶段,3年生桉树人工林(3YEF)冠层穿透水(穿透雨深0～10mm)的浊度、色度、pH值、COD等4个水质参数的值分别为150NTU、55度、4.97和85.5mg·L-1,树干径流(径流量0～600ml)的4个水质参数值分别为193NTU、153度、4.76和117.8mg·L-1,3年生桉树对林内雨水质的影响大于7年生杂交相思林(7YMA)、13年生马尾松林(13YPF)和软阔林(SBLF)。不同林龄桉树对林内雨水质的影响存在显著差异,1年生桉树林(1YEF)的最小,3年生的最大,7年生(7YEF)的居中。6种不同林分森林对林内雨水质的影响随淋溶的不断进行由强变弱。同一林分人工林其冠层穿透水水质优于树干径流。更多还原

【Abstract】 To better understand the impact of eucalyptus on water quality,water samples of canopy throughfall and stemflow were collected from 6 types of forest during storm events using canopy rain collection systems.The samples were analyzed for turbidity,color,pH and chemical oxygen demand(COD).The results show that,on the first leaching stage,the values of turbidity,color,pH,and COD of through fall(0～10 mm) from 3 year-old eucalyptus forest(3YEF) are 150 NTU、55 degree、4.97,and 85.5 mg L-1,respectively.In comparison,the turbidity,color,pH,and COD in stemflow are 193 NTU、153 degree、4.76,and 117.8 mg L-1,respectively.The effect of 3 year-old eucalyptus forest on canopy rain quality is significantly larger than that of 7 year-old Acacia mangium×A.auriculaef Ormis forest(7YMA),13 year-old Pinus massoniana Lamb forest(13YPF)and soft broad-leaved forest(SBLF).The effect of 6 types of forest on canopy rain quality diminished over the leaching process.The water quality of canopy throughfall is better than that of stem flow.更多还原