土壤2017，Vol.49Issue(1)：40-48,9.DOI:10.13758/j.cnki.tr.2017.01.007
鄱阳湖湿地碟形湖泊沿高程梯度土壤养分及化学计量研究
Soil Nutrients and Stoichiometry Along Elevation Gradients in Shallow-lakes of Poyang Lake Wetland
摘要
Abstract
Four types of wetland habitats, i.e. downland, high beach, low beach and swamp, were chosen as elevation gradients in 4 shallow - lakes in Nanjishan wetland nature reserve of Poyang Lake and the contents of soil C, N and P contents and their stoichiometry along the 4 elevation gradients were determined. The results showed that SOC content in 0–10 cm soil layer was lowest in the downland, TN and TP contents were ranked as downland >high beach > low beach > swamp, TN was positively correlated with TP content, SOC and TN contents were decreased with the depth of soil layer, mean ratios of C/N, C/P and N/P were 11.17, 52.74 and 5.03, respectively. In the study area, soil C/N was relatively stable, while C/P and N/P varied substantially either along elevation gradients or among shallow-lakes. NH4+-N content was ranked as downland < high beach < low beach < swamp, while NO3–-N content was ranked as high beach < low beach < downland < swamp. Furthermore, AP and TP contents were positively correlated. In short, soil nutrients in the study area exhibits large variations due to the seasonal dynamics of hydrology in Poyang Lake and TN was the primary limiting factor of N/P ratio.关键词
鄱阳湖/南矶山湿地/土壤养分/化学计量比/高程梯度/碟形湖Key words
Poyang Lake/Nanjishan wetlands/Soil nutrients/Stoichiometric ratio/Elevation gradients/Shallow-lakes分类
农业科技引用本文复制引用
雷学明,段洪浪,刘文飞,纪宇皝,周际海,吴建平,樊后保..鄱阳湖湿地碟形湖泊沿高程梯度土壤养分及化学计量研究[J].土壤,2017,49(1):40-48,9.基金项目
国家自然科学基金项目(31570444、31360175)和江西省科技厅项目(20161BBH80049、GJJ151097)资助. （31570444、31360175）
