昆明松华坝水源区不同土地利用方式对土壤有机碳及活性有机碳组分的影响  

Effects of Three Different Land Use Types on Soil Organic Carbon and Active Organic Carbon Fractions in Water Source Area of Songhuaba,Kunming

作　　者：朱晓婷[1] 王克勤[1] 陈敏全 赵吉霞[1] 华锦欣 

机构地区：[1]西南林业大学,昆明650224

出　　处：《东北林业大学学报》2016年第2期26-30,共5页Journal of Northeast Forestry University

基　　金：国家自然科学基金(30660037);云南省"十二五"优势特色重点学科--生态学建设项目(41500665)

摘　　要：以松华坝水源区3种主要的土地利用方式为研究对象,分析了不同土地利用方式0~20 cm的土壤有机碳和碳储量、活性有机碳组分(水溶性有机碳、易氧化有机碳、颗粒有机碳)质量分数及其月动态变化。研究结果表明:(1)不同土地利用方式下土壤有机碳差异显著(p<0.05),灌木林地的有机碳质量分数为(17.21±0.04)^(22.00±0.15)g·kg^(-1),坡耕地的有机碳质量分数为(12.26±0.03)^(14.84±0.36)g·kg^(-1),荒地的有机碳质量分数为(6.13±0.04)^(7.54±0.25)g·kg^(-1)。灌木林地的土壤有机碳明显高于其他样地,荒地的质量分数最低,土壤碳储量、水溶性有机碳、易氧化有机碳、颗粒有机碳的质量分数变化也呈现同样的规律。(2)灌木林地和坡耕地各项指标质量分数的月动态变化显著(p<0.05),而荒地的则表现的较为平缓(p>0.05)。(3)土壤有机碳质量分数与活性有机碳组分之间及活性有机碳组分两两之间的相关性均达到极显著水平(p<0.01)。Three different land use types in Songhuaba was selected as the study object,we studied the contents of aggregates and total soil organic carbon and carbon storage,as well as soil active organic carbon fractions including dissolved organic carbon,readily oxidized organic carbon and particulate organic carbon in the 0-20 cm soil layer,and analyzed the monthly dynamic changes of soil organic carbon and soil active organic carbon fractions contents of every land use types. Soil organic carbon contents of different land use types showed significant differences（ p 0. 05）,that of shrubland was ranged in（ 17.21±0.04）-（ 22.00±0.15） g·kg^（-1）,that of slope cropland was ranged in（ 12.26±0.03）-（ 14.84±0.36） g·kg^（-1）,and that of wasteland was ranged in（ 6.13± 0.04）-（ 7. 54 ± 0. 25） g·kg^（-1）. Soil organic carbon in shrubland was much higher than that in the other sample plots,while that in wasteland was the lowest,the changes of carbon storage dissolved organic carbon,readily oxidized organic carbon and particulate organic carbon mass fractions also showed the same rule. The monthly dynamic changes of soil organic carbon and soil active organic carbon fractions contents of shrubland and slope cropland showed significant differences（ p〈0.05）,while that of wasteland was comparatively gentle（ p〉0.05）. The relativity of soil organic carbon and soil active organic carbon fractions showed a very significant level（ p〈0. 01）. There were significant correlation between any two groups of the soil active organic carbon fractions（ p〈0.01）.

关 键 词：土壤有机碳 土壤活性有机碳组分 土地利用方式 松华坝水源区 

分 类 号：S153.6[农业科学—土壤学]