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Issue:
Effects of root exclusion on soil respiration in Cinnamomum camphora plantation
Author(s):
LIU Zhi
,
YAN Wen-de
,
WANG Guang-jun
,
ZHENG Wei
,
LIANG Xiao-cui
,
SU Shao-feng
Pages:
120
-
124
Year:
2012
Issue:
5
Journal:
Journal of Central South Forestry University
Keyword:
土壤呼吸
;
樟树人工林
;
土壤温度
;
土壤湿度
;
Abstract:
采用LI-8100开路式土壤C通量测定系统,对去根处理的樟树人工林土壤呼吸进行了为期1 a的观测。结果表明:去根处理和对照的土壤呼吸速率均呈现显著的季节性变化,土壤CO2呼吸速率月平均值变化动态呈单峰曲线;对照处理土壤呼吸速率变化范围为1.426~5.641μmol·m-2s-1,去根处理后的土壤呼吸速率范围为1.137~4.257μmol·m-2s-1;去除根系的土壤呼吸速率与5 cm土壤温度之间均呈显著指数相关(P=0.000),与5 cm土壤湿度之间呈二次曲线相关(P=0.012)。根系是影响土壤CO2通量的一个重要因子。
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