摘要
2010年4-10月,采用静态箱-气相色谱法,研究了晴天条件下华北南部低丘山地29a生的栓皮栎人工林林地土壤呼吸变化特征及其与撂荒地的差异。结果表明:(1)撂荒地和栓皮栎林土壤呼吸速率月变化趋势均呈单峰曲线,且土壤呼吸速率最大值均出现在7月份。测定时期内的栓皮栎林土壤呼吸速率平均值为601.69mg.m-2.h-1,比撂荒地的1007.96mg.m-2.h-1约低40.3%。(2)影响撂荒地和栓皮栎人工林地土壤呼吸速率的主要因子是土壤温度,与土壤湿度的相关性不明显,且撂荒地与栓皮栎林地在土壤5cm深处的Q10分别为2.702、2.573。
During the growing season of 2010,in order to find the difference of soil respiration between the 29-year-old quercus variabilis plantation and abandoned land,soil respiration rate were measured with the static chamber-gas chromatography method in the south hilly region of North China.The main results were as follows：（1）the seasonal variation curves of soil respiration on the plantation and abandoned land both had a single peak during the studying period.The largest soil respiration rate occurred in the July.Average soil respiration on the plantation during the studying period was 601.69 mg·m^-2·h^-1 less than the abandoned land（1007.96mg·m^-2·h^-1）,about 40.3% lower.（2） Both for the abandoned land and quercus variabilis plantation,soil respiration were controlled mostly by soil temperature and there was no significant correlation between the soil respiration rate and soil water content in the studied abandoned land.At the depth of 5cm,Q10 of the abandoned land and quercus variabilis plantation were 2.702 and 2.573,respectively.
出处
《中国农业气象》
CSCD
2011年第3期346-349,共4页
Chinese Journal of Agrometeorology
基金
国家自然科学基金(40871106)
公益性(林业)行业科研专项项目(2011432009)
关键词
华北低丘山区
栓皮栎人工林
撂荒地
生长季
土壤呼吸
Hilly region of North China
Quercus variabilis plantation
Abandoned land
Growing season
Soil respiration
