生态环境学报2012，Vol.21Issue(4)：624-628,5.
冻融对长白山森林土壤碳氮矿化的影响
Effect of freezing-thawing on the carbon and nitrogen mineralization in Changbai Mountain
摘要
Abstract
There are many freezing-thawing cycles (FTC) during the late autumn and early spring in ChangbaiMoutain. Freezing-thawing cycles affected the availability of soil water significantly, which would influence the soil physical, chemical and biological characteristics. A laboratory incubation experiment was conducted to investigate the effect of freezing-thawing cycles (-20-15℃)on the carbon and nitrogen mineralization of Broadleaved-Korean pine mixed forests (HS) and Birch forest (BH) soils. The results showed that the carbon mineralization rate of freezing-thawing treatment was higher than control treatment after the third freezing-thawing cycles. But, with the numbers of freezing-thawing increasing, the freezing-thawing restrained the carbon mineralization, and the carbon mineralization rate of control treatment was higher than freezing-thawing (/MI.0I9). The inorganic nitrogen concentration in soil of HS and BH were 1.88 and 1.96 times as that of the control treatment after incubation reciprocally. The nitrogen mineralization of soils was affected by numbers of freezing-thawing significantly. The results indicated freezing-thawing process was benefited to the improvement of soil inorganic nitrogen content. That could provide abundant nutrient for the growth of plants in spring, on the other hand, might improve the possibility of nutrient loss from soil.关键词
冻融过程/碳矿化/氮矿化/温带森林/长白山Key words
freezing and thawing cycles/ carbon mineralization/ nitrogen mineralization/ temperate forest ecosystems/ Changbai Mountain分类
农业科技引用本文复制引用
贾国晶,周永斌,代力民,周旺明..冻融对长白山森林土壤碳氮矿化的影响[J].生态环境学报,2012,21(4):624-628,5.基金项目
国家自然科学基金项目(30900208,41071036) （30900208,41071036）
国家林业公益性行业专项(201104070) （201104070）
