长白山次生蒙古栎林细根生物量及其季节动态  

Fine Roots Biomass and Seasonal Dynamics of Secondary Mongolian Oak Forestry in Changbai Mountain in China

作　　者：王悦山 夏天[2] 范春楠[2] 郑金萍[2] 李兵[2] 郭忠玲[2] 

机构地区：[1]延边朝鲜族自治州林业管理局,吉林延吉133001 [2]北华大学林学院,吉林吉林132013

出　　处：《北华大学学报（自然科学版）》2012年第6期700-704,共5页Journal of Beihua University（Natural Science）

基　　金：中国科学院战略性先导科技专项(XDA05050201);国家自然科学基金项目(30470293)

摘　　要：通过对长白山次生蒙古栎林细根生物量及动态的研究发现:4月末～9月末细根总生物量介于4.023 3～4.916 3 t/hm2,随时间逐渐增加;各月平均有67.2%的细根生物量集中于土壤表层0～10 cm,仅7月末0～10 cm土层细根生物量的比例(59.3%)偏低.细根表现为向深土层生长,不同土层内活细根所占比例的变化与活细根总生物量的季节变化规律基本相同,最低值出现在4月末;该群落细根年生长量为2.228 0 t/hm2,年死亡量为0.782 0 t/hm2,年分解量为0.119 0 t/hm2,年周转率为0.54次/a.Fine roots biomass and seasonal dynamics of secondary Mongolian oak forestry were studied in Changbai Mountain.The results showed that the fine roots biomass increased gradually with changing of season and its range was from 4.023 3 t/hm2 to 4.916 3 t/hm2 from late April to late September.The rate of fine roots biomass of different soil layers indicted that the monthly fine roots biomass in 0-10 cm was 67.2%,but it was lower（59.3%）in late July.The biomass was the lowest in late April,and the changing trend of the living fine roots biomass in different layers was the similar to the total living fine root biomass.The annual production of growth,mortality and decomposition were 2.228 0 t/hm2,0.782 0 t/hm2 and 0.119 0 t/hm2 respectively in the forest.And the annual fine root turnover rate was 0.54 times per year.

关 键 词：蒙古栎 细根生物量 季节动态 细根周转 

分 类 号：S718.55[农业科学—林学]