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当前位置: 首页 > 文章 > 滇东山原红壤退化过程中的土壤剖面有机质与养分变异 土壤 2015,47 (5) 947-952
Position: Home > Articles > Variations of SOM and Available Nutrients in Soil Profiles During the Process of Mountain Red Earth Degradation Soils 2015,47 (5) 947-952

滇东山原红壤退化过程中的土壤剖面有机质与养分变异

作  者：
许路艳;王嘉学;余洁芳;王浩瀚
单  位：
云南师范大学旅游与地理科学学院;云南师范大学旅游与地理科学学院昆明理工大学环境科学与工程学院富源县林业局
关键词：
山原红壤;土壤剖面;有机质;养分;相关性分析
摘  要：
山原红壤是云贵高原广泛发育的一种地带性古土壤,近年来退化严重,为了解山原红壤退化过程,采用"以空间换时间"的思路,对云贵高原山原红壤区同一区域林地、灌丛、草地和裸地土壤剖面养分含量进行对比分析。结果表明:从能生长植被的山原红壤至多年难以生长植被的"红裸土",土体平均有机质含量呈灌丛>草地>林地>裸地的变化趋势;灌丛和草地土壤有机质含量随剖面深度递增而降低,裸地和林地土壤削面有机质含量没有明显的垂直变化规律;与有植被覆盖的各土体相比裸地的硝态氮、铵态氮和速效钾剖面含量具有特殊性,硝态氮含量随剖面深度的递增明显减小,铵态氮含量随剖面深度的递增而增大;随着植被的退化,土壤有机质与养分的相关性大致呈减弱趋势,灌丛的土壤有机质与养分的相关性最强,裸地土壤有机质与养分相关性最弱。
译  名：
Variations of SOM and Available Nutrients in Soil Profiles During the Process of Mountain Red Earth Degradation
作  者：
XU Lu-yan;WANG Jia-xue;YU Jie-fang;WANG Hao-han;School of Biological Resources and Environmental Science,Qujing Normal University;School of Tourism and Geographical Science,Yunnan Normal University;Department of Geography and Resource Environment,Qinghai Normal University;
关键词：
Mountain red earth;;Soil profile;;SOM;;Available nutrient;;Correlation analysis
摘  要：
Mountain red earth is a kind of zonal paleosol and the most serious degradation occurred in the soil in recent years.To get insight into the degradation mechanisms of mountain red earth,the method of "exchange time with space" was used to compare the available nutrients in soil profiles under woodlands,shrubs,grassland and bare land in the same area of Yun-gui plateau.The results indicated that the average soil SOM contents followed the order:shrubs > grassland > woodlands > bare land.The SOM contents decreased with the increasing depth in the profiles of shrubs and grassland,while there was no obvious vertical variation of soil SOM in the profiles of bare land and woodlands.Compared to the lands with vegetation,bare land showed some different characteristics in the contents of soil ammonium-N,nitrate-N and available K.The nitrate-N content decreased gradually with the increasing depth in soil profile of bare land,while the ammonium-N changed oppositely with the depth of the soil profile.The content of soil available K was higher under bare land than the lands with vegetation and it did not change with depth below 30 cm in the soil profile.The correlation between SOM and nutrients was weakened with the degradation of vegetation,it was the strongest under shrubs and the weakest under bare land.

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