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| 西南喀斯特石漠化过程中土壤有机质组分及其影响因素 | |
| 引用本文： | 李孝良,陈效民,周炼川,吴广凤.西南喀斯特石漠化过程中土壤有机质组分及其影响因素[J].山地学报,2010,28(1). |
| 作者姓名： | 李孝良 陈效民 周炼川 吴广凤 |
| 作者单位： | 1. 南京农业大学资源与环境科学学院,江苏,南京,210095;安徽科技学院城建与环境学院,安徽,凤阳,233100 2. 南京农业大学资源与环境科学学院,江苏,南京,210095 3. 安徽科技学院城建与环境学院,安徽,凤阳,233100 |
| 基金项目： | 国家973计划项目"西南喀斯特山地石漠化与适应性生态系统调控"子课题"养分生物地球化学循环及其对石漠化过程的响应" |
| 摘 要： | 通过采集我国西南喀斯特地区不同石漠化阶段典型土壤样品,研究了土壤有机质组分及其影响因素.结果表明:(1)喀斯特地区土壤有机质各组分含量中胡敏素>富里酸>胡敏酸,HA/FA一般<0.4,为富里酸土壤,与同水平地带土壤一致.(2)石漠化过程对喀斯特地区土壤中有机质组成有明显的影响,土壤中胡敏素、富里酸与胡敏酸表现出未石漠化＞潜在石漠化＞轻度石漠化＞中度石漠化的趋势.(3)喀斯特地区土壤有机质组分空间分布有较大差异,剖面层次上各有机质组分胡敏素、富里酸与胡敏酸均表现出表土层>底土层,山区不同部位上表现以山坡中下部有机质含量最高,而以山顶最低,且FA/HA表现出从山顶到山脚有明显增加的趋势.(4)喀斯特地区土壤土壤有机碳、酸碱度、碳酸钙、容重、非晶形氧化铝、颗粒组成、有效磷与土壤有机碳组分间表现出显著或极显著的相关性,土壤有机碳和质地是影响土壤有机碳组分含量的主要因素. |
| 关 键 词： | 喀斯特地区 石漠化过程 土壤有机碳组分 影响因素 |
Study on Soil Organic Carbon Fractions and Their Influential Factors in Rocky Desertification Process in Southwest of China |
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| LI Xiaoliang,CHEN Xiaomin,ZHOU Lianchuan,WU Guangfeng.Study on Soil Organic Carbon Fractions and Their Influential Factors in Rocky Desertification Process in Southwest of China[J].Journal of Mountain Research,2010,28(1). | |
| Authors: | LI Xiaoliang CHEN Xiaomin ZHOU Lianchuan WU Guangfeng |
| Institution: | LI Xiaoliang1,2,CHEN Xiaomin1,ZHOU Lianchuan1,WU Guangfeng2 (1.College of Resources , Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China,2.College of Urban Construction , Environment Sciences,Anhui Science , Technology University,Fengyang 233100,China) |
| Abstract: | Through collecting typical soil samples in different phases of rocky desertification and analyzing their basic properties in karst region in Southwest of China,the soil organic carbon fractions and their influential factors were studied.The results were as follows.(1)The sequence of the contents of soil organic carbon in karst region was Humin(HM)> Fulvic acid(FA)> humic acid(HA),and owing to the value of FA/HA that was currently less than 0.4,karst soils was fulvic acid soils that accord with the same hori... |
| Keywords: | karst region rock desertification soil organic carbon fractions influential factors |
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