三江平原碟形洼地-岛状林土壤阳离子交换量分布特征  

Distribution Characteristics of Soil Cation Exchange Capacity of Saucer-shaped Depressions to Island Forests in the Sanjiang Plain

作　　者：孔令阳 殷书柏[2] 刘吉平[1] 梁晨[3] KONG Ling-yang;YIN Shu-bai;LIU Ji-ping;LIANG Chen(College of Tourist and Geoscience, Jilin Normal University, Siping 136000, China;Department of Resource Management, Tangshan Normal University, Tangshan 063000, China;School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China)

机构地区：[1]吉林师范大学旅游与地理科学学院,四平136000 [2]唐山师范学院资源管理系,唐山063000 [3]北京林业大学生态与自然保护学院,北京100083

出　　处：《科学技术与工程》2021年第21期8828-8833,共6页Science Technology and Engineering

基　　金：国家自然科学基金(41071037);吉林省教育厅项目(JJKH20200415KJ);吉林省社会科学基金(2018B175)。

摘　　要：通过野外调查采样和室内测定分析,研究了三江平原碟形洼地-岛状林土壤阳离子交换量(cation exchange capacity,CEC)分布特征及其与水文地貌、土壤养分和群落特征的关系。结果表明,三江平原碟形洼地-岛状林土壤CEC为9.83~37.97 cmol/kg;碟形洼地-岛状林方向上,0~40 cm深度土壤CEC平均值先增大后减小而后稍有增大,呈“N”字形,毛薹草群落区土壤阳离子交换量最大(26.82 cmol/kg),乌拉薹草群落区最小(23.26 cmol/kg);垂直方向上,随着土层深度增加,土壤CEC逐渐减少,基本处于低度和中度变异。土壤CEC分布主要受土壤有机质的积累状况影响,土壤全磷全氮含量与土壤CEC含量呈极显著的正相关,土壤钾含量与土壤CEC呈极显著的负相关。The distribution characteristics of cation exchange capacity(CEC)in saucer-shaped depressions to island forests of Sanjiang Plain and its relationship with hydrology and geomorphology,soil nutrients and community characteristics were studied through field sampling and indoor measurement analysis.The results show that the CEC of soil in the saucer-shaped depressions to island forests of Sanjiang Plain is 9.83~37.97 cmol/kg.In the direction of the saucer-shaped depressions to island forests,the average CEC of the 0~40 cm depth soil first increases,then decreases,and then slightly increases,presenting an N shape.The cationic exchange capacity of the soil in the area of Carex lasiocarpa community is the largest(26.82 cmol/kg),while the smallest is Carex meyeriana community(23.26 cmol/kg).In the vertical direction,with the increase of soil depth,soil CEC gradually decreases and is in low and moderate variation.The soil CEC distribution in saucer-shaped depressions to island forests is mainly affected by the accumulation of soil organic matter,and the soil total phosphorus and total nitrogen content has an extremely significant positive correlation with the soil CEC content.Soil CEC in saucer-shaped depressions to island forests was significantly negatively correlated with soil potassium content,indicating the weakening effect of potassium on soil CEC in wetland.

关 键 词：阳离子交换量 碟形洼地 岛状林 影响因素 三江平原 

分 类 号：S153.3[农业科学—土壤学]