摘要
2008年7—9月,测定了辽东山区次生林生态系统5种主要林型(落叶松人工林、花曲柳林、杂木林、红松人工林和蒙古栎林)中穿透雨和林外雨的理化性质.结果表明:与林外雨相比,5种林型穿透雨均出现明显的酸化(P<0.05),其酸化程度为:红松林>落叶松林>杂木林>蒙古栎林>花曲柳林;各林型的穿透雨电导率和总溶解固体含量显著升高(P<0.05),为蒙古栎林>花曲柳林>落叶松林>杂木林>红松林;穿透雨的溶解氧浓度显著降低(P<0.05),为红松林>杂木林>花曲柳林>蒙古栎林>落叶松林;穿透雨中Cl-浓度较林外雨明显升高,为落叶松林>蒙古栎林>杂木林>花曲柳林>红松林;花曲柳林、蒙古栎林和杂木林穿透雨中NO-浓度均高于林外雨,而落叶松林和红松林NO-浓度低于林外雨.
From July to September 2008, a measure properties of bulk precipitation and throughfall in fi LP) KP) ment was made on the ve main forest types, physical and chemical i. e. , larch plantation Fraxinus rhynchophylla stand (FR), mixed forest stand (MF), Korean pine plantation and Mongolian oak stand ( MO), of secondary forest ecosystem in montane regions of eastern Liaoning Province, China. Comparing with bulk precipitation, the throughfall in the five forest types was significantly acidified (P 〈0.05 ), and the acidification degree was in the order of KP 〉 LP 〉 MF 〉 MO 〉 FR. The conductivity and total dissolved solids of the throughfall increased significantly ( P 〈0. 05 ), and were in the sequence of MO 〉 FR 〉 LP 〉 MF 〉 KP. The dissolved oxygen concentration of the throughfall lowered significantly ( P 〈0. 05 ), with the rank of KP 〉 MF 〉 FR 〉 MO 〉 LP, while the Cl^- concentration increased significantly, ranked as LP 〉 MO 〉 MF 〉 FR 〉 KP. The NO3^- concentrations of the throughfall in FR, MO and MF were higher, while those in LP and KP were lower than that of the bulk precipitation.
出处
《应用生态学报》
CAS
CSCD
北大核心
2009年第9期2097-2104,共8页
Chinese Journal of Applied Ecology
基金
国家水体污染控制与治理科技重大项目(2008ZX07208-007-01)
国家"十一五"科技支撑计划项目(2006BAD03A0903)
沈阳市科技项目(1081283-9-00)资助