生态环境学报2011，Vol.20Issue(11)：1665-1669,5.
冀北山地山杨桦木林生态系统水化学特征研究
Study on Precipitation Hydro-chemical Characteristic of Mixed Forest of Poplar and Birch of North Mountain of Hebei Province
摘要
Abstract
Because of precipitation serves as one of major approaches of nutrient input into the forest ecosystem, the accurate measurement of its volume and ion concentration is of prime importance in an evaluation of nutrient biogeochemical cycle. The contents of six nutrient elements (Ca, Fe, K, Mg, Mn, Zn) in through-fall, stem-flow and litter water were measured in the larch forest of mixed forest of Poplar and Birch of Hebei Province. The results showed that: (1) precipitation canopy layers after its hydrochemistry characteristic obviously changed, chemical element content to have the varying degree increase, The concentration sequences of the nutrient elements are as follow: Ca > K > Mg > Fe > Mn > Zn, among the growth of most multiples is Mn. Each index of stem-flow all increase a lot, The concentration sequences are as follow: K > Ca > Mg > Fe > Mn > Zn. Withered falling objects water K and Ca element concentration increases the maximum. (2) the largest variation coefficient is Zn ,in the rainfall of atmospheric, is 2.853; the smallest is K and Ca, is 0.158, 0.163. Deciduous pine tree trunks through rain, withered stalk flow and variation coefficient were largest in permeable Mn elements for 0.717, Zn elements for 1.588, Fe element for 0.553. (3) through leaching after samples of each element in the concentration increases, penetrate water, trunk run off and the withered permeable of K and Ca increased considerably, Fe, Zn leaching of less.关键词
山杨桦木林/大气降雨/穿透雨/树干茎流/枯透水/养分输入Key words
the mixed forest of Poplar and Birch/ precipitation/ through-fall/ stem-flow/ withered permeable/ nutrient input分类
农业科技引用本文复制引用
刘阳,杨新兵,陈波,赵心苗,田超,张建华..冀北山地山杨桦木林生态系统水化学特征研究[J].生态环境学报,2011,20(11):1665-1669,5.基金项目
林业公益性行业科研专项子课题(200804022F) （200804022F）
