安徽老山亚热带常绿阔叶林降雨中的养分动态  

Dynamics of Nutrients in Precipitation in Subtropical Evergreen Broad-Leaved Forest at Laoshan Mountains,Southern Anhui

作　　者：张赟齐[1] 曾玲梅[1] 王陆军[1] 徐小牛[1] 

机构地区：[1]安徽农业大学林学与园林学院,合肥230036

出　　处：《林业科学》2011年第12期143-148,共6页Scientia Silvae Sinicae

基　　金：国家自然科学基金项目(30471386;30771719)

摘　　要：森林生态系统对降雨化学性质的影响十分明显,降雨经过森林植被后,其养分种类和数量都发生很大变化。通过降雨输入的养分不仅对森林群落的生长和演替具有重要意义,而且是森林生态系统生物化学循环的重要组成部分,构成森林生态系统养分平衡的基础。国内外有关森林降雨化学的研究较多。In this study,the seasonal dynamic patterns of nutrients in the bulk precipitation,throughfall and stemflow were investigated in a subtropical evergreen broad-leaved forest over one year in Laoshan Natural Reserve,southern Anhui.The results showed that the concentrations of nutrients were significantly increased after rain passed through forest canopies.The mean concentration of K＋,Ca2＋,Mg2＋,NH＋4-N,NO-3-N,PO3-4 were,respectively,1.40 mg·L-1,3.08 mg·L-1,0.056 mg·L-1,0.42 mg·L-1,0.51 mg·L-1,and 6.86 μg·L-1 for the bulk precipitation;3.88 mg·L-1,4.69 mg·L-1,0.27 mg·L-1,0.44 mg·L-1,0.94 mg·L-1 and 10.73 μg·L-1 for the throughfall;and 5.78 mg·L-1,8.02 mg·L-1,0.45 mg·L-1,0.94 mg·L-1,1.03 mg·L-1 and 19.98 μg·L-1 for the stemflow.The nutrient concentrations of precipitation fluctuated with rainfall intensity.The nutrient concentrations of throughfall and stemflow were affected by not only atmospheric conditions but the growth stage of trees.

关 键 词：森林水文化学 常绿阔叶林 穿透雨 树干径流 

分 类 号：S715[农业科学—林学] Q948[生物学—植物学]