秦岭火地塘天然次生油松林倒木的温度变化特征  

Dynamics characteristics of fallen wood temperature in secondary forest of Pinus tabulaeformis at Huoditang forest region in Qinling mountains

作　　者：袁杰[1] 蔡靖[1,2] 侯琳[1,2] 张硕新[1,2] 

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100 [2]陕西秦岭森林生态系统国家野外科学观测研究站,陕西宁陕711600

出　　处：《中南林业科技大学学报》2012年第9期81-86,共6页Journal of Central South University of Forestry & Technology

基　　金：国家林业局林业公益性行业科研专项"秦岭山地森林增汇理水技术体系研究"(201004036)

摘　　要：以秦岭火地塘天然次生油松林内的油松和漆树倒木为研究对象,通过数字式瞬时温度计测定了不同树种、不同腐烂等级倒木温度、气温和10 cm地温的日变化(8:00～18:00)和年变化。结果表明:油松和漆树倒木温度差异不显著,但1～12月漆树倒木温度均高于油松倒木温度;倒木温度有明显的年变化和日变化,并表现出倒木温度的变化滞后于气温和10 cm地温的变化,但倒木温度与气温和10 cm地温间的相关性和滞后性却随树种和腐烂等级而有所不同;对油松和漆树不同腐烂等级倒木温度与气温和10 cm地温间的关系进行拟合可以看出,倒木温度与气温间是一段抛物线,而倒木温度与10 cm地温间存在极显著的线性关系;相较于气温,倒木温度与10 cm地温相关性更为密切,即相关系数更大。Daily and annual changes of different tree species and decay classes of fallen wood＇s temperature,air and 10 cm soil temperature were measured by digital instantaneous thermometer in a natural secondary forest of Pinus tabulaeforims at Huoditang forest region in the Qinling Mountains.The fallen wood＇s temperature of Toxicodendron vernicifluum were higher than those of P.tabulaeforims from January to December,but there was no significant difference between them.The fallen wood＇s temperature showed obvious daily and annual changes,which lagged behind those of air and 10 cm soil temperature.However,the correlation and lag of fallen wood,air and 10 cm soil temperature varied with tree species and decay classes.The relationship between the temperatures of different decay classes of P.tabulaeforims and T.vernicifluum fallen wood and the air temperatures were simulated by a parabola,and significant linear relationship between the temperatures of different decay classes of P.tabulaeforims and T.vernicifluum fallen wood and the 10 cm soil temperatures could be found.Compared with the air temperatures,10 cm soil temperatures were closer correlated with fallen wood temperatures.

关 键 词：天然次生油松林 秦岭 倒木温度 倒木分解 倒木呼吸 预测模型 

分 类 号：S718.5[农业科学—林学]