CAJ | 학술논문

以桂北地区的4年生、20年生桉树林和22年生马尾松林为研究对象.于2012年 9~11月分别对这3种林分的土壤呼吸及其组分、土壤温度、土壤湿度进行了3个月的观测.结果表明：(1)4年生桉树林及22年生马尾松林的土壤呼吸速率显著大于20年生桉树林,4年生桉树林与22年生马尾松林无显著差异；(2)3种林分自养呼吸速率 4年生桉树林显著大于20年生桉树林及22年生马尾松林：异养呼吸速率22年生马尾松林显著大于 4年生桉树林及20年生桉树林.4年生桉树林的自养呼吸贡献率明显大于20年生桉树林和22年生马尾松林；(3)相关性分析表明,土壤温度是影响土壤呼吸及其组分的主要环境因子,3种林分土壤温度与土壤呼吸均呈显著的指数关系.22年生马尾松林的土壤呼吸与土壤含水量呈显著负相关关系,2种桉树林的土壤呼吸与土壤含水量的相关性不显著；(4)对温度敏感性系数 Q10值的分析表明,3种林分中20年生桉树林和22年生马尾松林的温度敏感性较大,4年生桉树林最小.
이계북지구적4년생、20년생안수림화22년생마미송림위연구대상.우2012년 9~11월분별대저3충림분적토양호흡급기조분、토양온도、토양습도진행료3개월적관측.결과표명：(1)4년생안수림급22년생마미송림적토양호흡속솔현저대우20년생안수림,4년생안수림여22년생마미송림무현저차이；(2)3충림분자양호흡속솔 4년생안수림현저대우20년생안수림급22년생마미송림：이양호흡속솔22년생마미송림현저대우 4년생안수림급20년생안수림.4년생안수림적자양호흡공헌솔명현대우20년생안수림화22년생마미송림；(3)상관성분석표명,토양온도시영향토양호흡급기조분적주요배경인자,3충림분토양온도여토양호흡균정현저적지수관계.22년생마미송림적토양호흡여토양함수량정현저부상관관계,2충안수림적토양호흡여토양함수량적상관성불현저；(4)대온도민감성계수 Q10치적분석표명,3충림분중20년생안수림화22년생마미송림적온도민감성교대,4년생안수림최소.
The experiment were conducted on the young-growth Eucalyptus spp.forest(4 a),old-growth Eucalyptus spp.forest(20 a)and the Pinus massoniana forest(22 a)from September 2012 to November 2012 in Yaoshan Moun-tain of Guilin,the soil respiration and its components,the soil temperature and the soil water content of the three stands had been observed.The results were as follows:(1)The soil respiration rate of the young-growth Eucalyptus spp.forest(4 a)and the Pinus massoniana forest(22 a)were higher than the old-growth Eucalyptus spp.forest(20 a)significantly,but not significant difference between the young-growth Eucalyptus spp.forest(4 a)and the Pinus massoniana fores(22 a)t;(2)In the three stands,the autotrophic respiration rate of the young-growth Eucalyptus spp.forest(4 a)was higher than the old-growth Eucalyptus spp.forest(20 a)and the Pinus massoniana forest(22 a).The heterotrophic respiration rate of the Pinus massoniana forest(22 a)was higher than the young-growth Euca-lyptus spp.forest(4a)and the old-growth Eucalyptus spp.forest(20 a).The rate of contribution of autotrophic res-piration of the young-growth Eucalyptus spp.forest(4 a)was significantly greater than the old-growth Eucalyptus spp.forest(20 a)and the Pinus massoniana forest(22 a);(3)According to correlation analysis,we knew that the soil temperature was the main environmental factor influencing the soil respiration rate and its components.There ex-isted exponential relationship between the soil temperature and the soil respiration rate and its components.There were notable negative correlations between soil respiration rate and soil moisture content in the Pinus massoniana forest(22 a),but not significant correlation in the young-growth Eucalyptus spp.forest(4 a)and the old-growth Eu-calyptus spp.forest(20 a);(4)As for the three stands,the Q10 value analysis of the temperature sensibility coeffi-cient indicated that the value of the old-growth Eucalyptus spp.forest (20 a)and the Pinus massoniana forest(22 a) were the higher and the young-growth Eucalyptus spp.forest(4 a)was the lowest.