樟树人工林生态系统的水分生态效应  

Ecohydrological Effect of Cinnamomum camphor Plantation

作　　者：陈书军[1] 田大伦[2] 闫文德[2] 康文星[2] 

机构地区：[1]西北农林科技大学林学院,陕西杨陵712100 [2]中南林业科技大学生态研究室,湖南长沙410004

出　　处：《水土保持学报》2006年第1期10-14,共5页Journal of Soil and Water Conservation

基　　金：国家自然科学基金项目(30271043);国家科技部平台建设项目(20021220);国家林业局重点科研项目(2001-07);国家重点野外台站项目(2000-076)

摘　　要：对樟树人工林生态系统的大气降水、树干茎流、穿透水、林内地表径流、地下径流中N、P、S iO2、K、C a、M g、Cu、F e、Zn、M n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C a>S iO2>Zn>NH4-N>K>NO3-N>F e>M g>M n>P>Cu。大气降水经过林冠层后,树干茎流、林内穿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。树干茎流中各元素含量按大小排序为K>C a>NH4-N>S iO2>M g>NO3-N>Zn>M n>F e>P>Cu;林内穿透水中各元素含量按大小排序为C a>K>Zn>S iO2>NH4-N>NO3-N>M g>M n>F e>P>Cu。树干茎流中S iO2、F e、Zn,穿透水中F e为负淋溶,其余各元素浓度有所增加,在这2项中,除NH4-N、K外,树干茎流中NO3-N、P、S iO2、C a、Cu、F e、Zn、M n养分元素的富集作用均小于穿透水。The concentrations of 10 nutrient elements （N, P, SiO2, K, Ca, Mg, Cu, Fe, Zn, Mn）in rainfall, throughfall, stemflow, surface runoff of inside and underground flow were measured in Cinnamomum camphor plantation. The results showed that concentrations of the nutrients in the rainfall varied according to month. The concentration sequence of the nutrient elements in precipitation gone as follows：Ca〉SiO2〉Zn〉NH4-N〉K〉NO3-N〉 Fe〉Mg〉Mn〉P〉Cu. The concentrations of the nutrients in stemflow,throughfall also varied in same way and change seasonally, most of the nutrient elements concentration were increased. The sequence of the nutrient elements contained in stemflow, throughfaU were K 〉Ca〉 NH4- N 〉SiO2 〉 Mg〉 NO3 - N 〉 Zn 〉 Mn 〉Fe〉 P〉 Cu; Ca〉K〉Zn〉SiO2〉NH4- N〉NO3- N 〉Mg〉Mn〉Fe〉P〉Cu. The concentrations of SiO2, Fe, Zn in the stemflow, Fe in the throughfall were lower than those in the rainfall, while the concentrations of other elements are higher. Except to NH3- N, K, a lower nutrients enrichment of NO3- N, P, SiO2, Ca, Cu, Fe, Zn, Mn in the stemflow was identified in the two items.

关 键 词：樟树人工林 降水化学 冠层淋溶 养分含量 

分 类 号：Q148[生物学—生态学] P332.1[生物学—普通生物学]