【摘要】 对樟树人工林生态系统的大气降水,树干茎流,穿透水中N、P、K、Ca、Mg、Cu、Zn、Mn、和SiO29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>NH4+-N>Zn>K>NO3--N>Mg>Mn>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Ca>K>NH4+-N>SiO2>NO3--N>Mg>Zn>Mn>P>Cu,林内穿透水中各元素含量按大小排序为Ca>K>NH4+-N>SiO2>Zn>NO3--N>Mg>Mn>P>Cu,树干茎流中Cu和Zn为负淋溶.更多还原

【Abstract】 The concentrations of 9 nutrient elements （N、P、K、Ca、Mg、Cu、Zn、Mn、SiO₂） in rainfall, stem-flow and through-fall were measured in the artificial forest of Cinnamomum camphora （L.） Presl. The results show: the concentrations of the nutrients in rainfall vary according to the month; the concentration sequence of the nutrient elements in precipitation goes as follows: Ca>SiO₂>NH₄⁺-N>Zn>K>NO₃^--N>Mg>Mn>P>Cu; the concentrations of the nutrients in both stem-flow and through-fall also vary in the same way and change seasonally, most of them increasing; the concentration sequences of the nutrient elements contained in stem-flow and through-fall go respectively as follows: Ca>K>NH₄⁺-N>SiO₂>NO₃^--N>Mg>Zn>Mn>P>Cu and Ca>K>NH₄⁺-N>SiO₂>Zn>NO₃^--N>Mg>Mn>P>Cu; and the concentrations of Cu and Zn in stem-flow are lower than those in rainfall.更多还原