Soil respiration of major successional communities in the Maolan Nature Reserve of Karst areas
Soil respiration of major successional communities in the Maolan Nature Reserve of Karst areas
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发表时间：
2013
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通讯作者：
Zhu Jun
中科院分区：
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作者：
Zhu Jun
为了研究喀斯特地区主要演替群落的土壤呼吸，本研究以喀斯特原生林和次生林两种主要演替群落为研究对象，采用LI-6400-09便携式土壤呼吸拟合设备对土壤呼吸速率进行连续观测，结果表明：（1）土壤呼吸速率、土壤温度和林内温度的日变化幅度在不同演替阶段和不同月份之间存在差异。（2）两种主要演替群落的土壤呼吸速率均存在明显的季节变化，其季节变化顺序为夏季>秋季>春季>冬季，喀斯特原始林和次生林土壤呼吸速率的月平均值分别为0.39-4.65 μmol/（m2.s）和0.93-4.56 μmol/（m2.s）。（3）不同深度林内土壤呼吸速率与土壤温度呈显著正相关。（4）喀斯特原始林土壤呼吸的Q10值为3.82 ~ 4.07，次生林土壤呼吸的Q10值为2.52 ~ 2.61，且喀斯特原始林土壤呼吸的Q10值高于次生林，且随着土壤深度的增加，土壤呼吸的Q10值增加。
In order to study the soil respiration of major successional communities in Karst areas,LI-6400-09 portable soil respiration fitting equipment was employed in this study to carry on continuous observation on the soil respiration rates,of which were the two major successional communities of Karst primary forest and secondary forest as the research subjects.The results showed that:(1)The soil respiration rates,soil temperature and temperature inside forest were different in the diurnal changing range among the different successional communities and different months.(2)There were distinct seasonal changes for the soil respiration rates of the two major successional communities,and which were summer,autumn,spring and winter in decreasing order.The monthly mean of soil respiration rates ranged from 0.39-4.65 μmol/(m2·s) in Karst primary forest and ranged from 0.93-4.56 μmol/(m2·s) in secondary forest,respectively.(3)The soil respiration rates were significantly and positively correlated with soil temperature in different depth and temperature inside forest.(4)The Q10 value of soil respiration ranged from 3.82 to 4.07 in Karst primary forest and ranged from 2.52 to 2.61 in secondary forest,respectively.Moreover,the Q10 value in Karst primary forest was higher than in secondary forest;with soil depth increase,the Q10 value increased.