太岳山油松人工林土壤呼吸对抚育强度的响应

被引：7

作者：

刘保新 ^{[1
]}

汪金松 ^{[1
]}

康峰峰 ^{[1
]}

尚宝山 ^{[2
]}

赵秀海 ^{[1
]}

机构：

[1] 北京林业大学省部共建森林培育与保护教育部重点实验室

[2] 山西省太岳山国有林管理局灵空山林场

来源：

应用与环境生物学报 | 2012年 / 18卷 / 01期

关键词：

抚育强度; 土壤呼吸速率; 油松人工林; 土壤温度; 土壤湿度; 太岳山;

D O I：

暂无

中图分类号：

S791.254 [油松];

学科分类号：

0829 ; 0907 ;

摘要：

为了解不同抚育强度下土壤呼吸速率的差异及土壤温湿度对土壤呼吸速率的影响,利用LI-8100土壤CO2排放通量全自动测量系统测定山西太岳山油松人工林不同强度抚育后土壤呼吸速率,同时测量土壤表层10 cm处的温度和湿度.4块油松人工林样地的抚育强度分别为20%、30%、40%和50%,对4块抚育样地及1块对照样地进行3种处理:切根去凋、去凋和对照.结果表明:切根去凋处理条件下抚育样地与对照样地土壤呼吸速率无显著差异(P>0.05);去凋处理条件下抚育样地与对照样地土壤呼吸速率呈显著差异(P<0.01),抚育强度为20%、30%和40%样地6、7月的土壤呼吸速率显著高于对照样地(P<0.01);对照处理条件下,抚育样地与对照样地土壤呼吸速率呈显著差异(P<0.01),抚育强度为30%和40%样地6、7、8月的土壤呼吸速率显著高于对照样地(P<0.01).土壤温度和湿度与土壤呼吸速率显著相关(P<0.01),且共同解释了土壤呼吸速率变化的30%～74%,是影响土壤呼吸速率变化的重要环境因子.

引用

页码：17 / 22

页数：6

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