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作 者:高雪松[1] 何鹏[2] 邓良基[1] 张世熔[1] 黄春[1]
机构地区:[1]四川农业大学资源环境学院,四川雅安625014 [2]四川省农业科学院农业信息与农村经济研究所,四川成都610066
出 处:《生态环境学报》2009年第1期337-342,共6页Ecology and Environmental Sciences
基 金:国家科技支撑计划(2007BAD89B15);国家科技支撑计划(2006BAJ05A13);四川省科技攻关技术(07NG001-020)
摘 要:测定了紫色丘陵区疏林地、荒草地和坡耕地三种土地利用方式下土壤有机碳和颗粒有机碳含量,探讨不同利用方式与坡位下土壤有机碳和土壤颗粒有机碳的分布特征。结果表明:不同土地利用方式下上坡位和中坡位土壤有机碳和颗粒有机碳含量均为疏林地>坡耕地>荒草地,而在下坡位两者含量变化差异较大;不同土地利用方式下各坡位土壤剖面有机碳含量均是在0~5cm层富集,颗粒有机碳的含量也表现出一定在剖面分异性;不同土地利用方式土壤颗粒有机碳分配比例为(0.74±0.01)~(0.34±0.02),不同土地利用方式之间土壤颗粒有机碳分配比例差异较小。相关分析表明,不同利用方式下土壤有机碳、全氮和颗粒有机碳含量之间均呈显著的相关性。The distribution characteristics of soil organic carbon (TOC) and particle organic carbon (POC) in open forest, grassland and sloping field in purple hilly area were studied. The results showed that the content orders of TOC and POC in the upper slope and middle slope were open forest 〉 sloping field 〉 grassland, while in lower slope, the two carbon contents were obvious difference.soil section organic carbon of different slope positions were all enriched between 0 to 5cm, the contents of POC also represented some diversity in soil section, and the distribute rate of soil POC varied from 0.74±0.01 to 0.34±0.02, as well as there was little variations among different land utilization ways. The correlation analysis indicated that there was significantly correlation among soil TOC, total nitrogen (TN) and POC under different land utilization ways.
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