| 樟树人工林生态系统不同层次穿透水水化学特征 |
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| 引用本文： | 陈书军,田大伦,闫文德,项文化. 樟树人工林生态系统不同层次穿透水水化学特征[J]. 生态学杂志, 2006, 25(7): 747-752 |
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| 作者姓名： | 陈书军 田大伦 闫文德 项文化 |
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| 作者单位： | 1. 西北农林科技大学林学院,杨凌,712100;中南林业科技大学生态研究室,长沙,410004
2. 中南林业科技大学生态研究室,长沙,410004 |
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| 基金项目： | 国家高技术研究发展计划(863计划);科技部科技基础条件平台建设计划;林业部科研项目;国家野外台站科研项目 |
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| 摘 要： | 对樟树人工林生态系统的大气降水、林冠层穿透水、灌木层穿透水和草本层滴透水中N、P、SiO2、K、Ca、Mg、Cu、Fe、Zn和Mn共10种养分元素含量进行了测定。结果表明,不同月份大气降水养分元素含量不同,各元素各月平均含量按大小排序为Ca>SiO2>Zn>NH4-N>K>NO3-N>Fe>Mg>Mn>P>Cu。大气降水经过林冠层后,林冠层穿透水、灌木层穿透水、草本层滴透水中各养分元素含量变化基本一致,均表现季节动态变化,大多数元素含量增加。林冠层穿透水、灌木层穿透水、草本层滴透水中各元素各月平均含量按大小排序分别为Ca>K>Zn>SiO2>NH4-N>NO3-N>Mg>Mn>Fe>P>Cu、Ca>K>Zn>SiO2>NH4-N>NO3-N>Mg>Fe>Mn>P>Cu和Ca>NH4-N>K>SiO2>NO3-N>Mn>Mg>Zn>Fe>P>Cu。林冠层穿透水和灌木层穿透水中Fe,草本层滴透水中Fe、Zn为负淋溶,其余各元素浓度有所增加。在上述3项中,除NO3-N、Fe、Zn外,草本层滴透水中其它养分元素的富集作用都强于其它2项。
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| 关 键 词： | 樟树人工林 降水化学 冠层淋溶 养分含量 |
| 文章编号： | 1000-4890(2006)07-0747-06 |
| 修稿时间： | 2005-09-28 |
Hydrochemical characteristics of through-fall in different layers of Cinnamomum camphora plantation |
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| CHEN Shujun,TIAN Dalun,YAN Wende,XIANG Wenhua. Hydrochemical characteristics of through-fall in different layers of Cinnamomum camphora plantation[J]. Chinese Journal of Ecology, 2006, 25(7): 747-752 |
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| Authors: | CHEN Shujun TIAN Dalun YAN Wende XIANG Wenhua |
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| Abstract: | The measurement of nutrient elements N,P,SiO_2,K,Ca,Mg,Cu,Fe,Zn and Mn in rainfall,through-fall of canopy and shrub layer,and dripping of herb layer in Cinnamomum camphor plantation showed that the concentrations of test elements in rainfall varied with different month,and their monthly average concentrations decreased in the sequence of Ca>SiO_2>Zn>NH_4-N>K>NO_3-N>Fe>Mg>Mn>P>Cu.The concentrations of these elements in the through-fall of canopy and shrub layer and in the dripping of herb layer varied in the same way and changed seasonally,most of which were increased.The concentration sequence of the elements in the through-fall of canopy,through-fall of shrub layer,and dripping of herb layer was Ca>K>Zn>SiO_2>NH_4-N>NO_3-N>Mg>Mn>Fe>P>Cu,Ca>K>Zn>SiO_2>NH_4-N>NO_3-N>Mg>Fe>Mn>P>Cu,and Ca>NH_4-N>K>SiO_2>NO_3-N>Mn>Mg>Zn>Fe>P>Cu,respectively.The Fe concentration in the through-fall of canopy and shrub layer as well as the Fe and Zn concentrations in the dripping of herb layer were lower,while the concentrations of other elements were higher than those in the rainfall.Element enrichment except that of NO_3-N,Fe and Zn was stronger in the dripping of herb layer than in the through-fall of canopy and shrub layer. |
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| Keywords: | Cinnamomum camphora plantation precipitation chemistry canopy leaching nutrient concentration. |
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