摘要
用特制的不锈钢采气管及气相色谱仪对鹤山3种人工林土壤不同深度N2O浓度进行了原位采样及分析.结果表明:3种人工林土壤剖面N2O浓度具有较大的时空变异.马占相思林土层N2O浓度的顺序为15cm<30cm<45cm<60cm土层;荷木林和松林各土层的浓度顺序为30cm<15cm<45cm<60cm土层.对3种人工林整个观测期间相同深度N2O浓度的月平均值进行比较,15、30、45cm3个土层的高低顺序均为荷木林<马占相思林<松林,60cm土层则是马占相思林<荷木林<松林.在季节变化方面,马占相思林和荷木林有相似的变化趋势,以雨热充足的8月份较高,到11月份又有上升的趋势.松林N2O的季节变化趋势则是5、6月份以及8、9月份浓度较高.
The investigation on N_2O concentration in different soil depth under three plantations was carried out in Heshan station, the result showed that the spatial and temporal variation of N_2O concentration in different soil depth for all of the experimental plantations were obvious.N_2O concentration in defferent soil depth was in the order: 15 cm<30 cm<45 cm<60 cm soil depth for Acacia mangium plantation and 30 cm<15 cm<45 cm<60 cm soil depth for Schima superba and Pinus elliottii,P. massoniana plantation, N_2O concentration increased with increasing soil depth.The N_2O concentration in 15 cm , 30 cm and 45 cm soil depth for the three plantations were in turn: S. superba plantation<A. mangium plantation<P. elliottii,P. massoniana plantation, however, in 60 cm soil depth the sequence was of A. mangium plantation<S. superba plantation<P. elliottii,P. massoniana plantation.In the temporal variation, N_2O concentration were higher in August for A. mangium plantation and S. superba plantation, and in May,June,August and September for P. elliottii,P. massoniana plantation.\=
出处
《福建林学院学报》
CSCD
北大核心
2005年第3期264-268,共5页
Journal of Fujian College of Forestry
基金
国家自然科学基金资助项目(30170192)
中国科学院"百人计划".
关键词
鹤山地区
人工林
不同土层
N2O
Heshan area
plantations
different soil depth
N_2O
