任春颖,张柏,王宗明,宋开山,刘殿伟.吉林省西部半干旱地区土地利用方式对土壤养分的影响——以吉林省通榆县为例[J].干旱地区农业研究,2010,28(4):206~212
吉林省西部半干旱地区土地利用方式对土壤养分的影响——以吉林省通榆县为例
Effects of land use type on soil nutrients in the semiarid area of westernJilin Province ——A case study in Tongyu County of Jilin
  
DOI：10.7606/j.issn.1000-7601.2010.04.39
中文关键词:  土地利用方式  土壤养分  吉林省西部  通榆县
英文关键词:land use type  land use change  soil nutrients  western Jilin  Tongyu County
基金项目:中国科学院知识创新工程重要方向项目(KZCX2-YW-341),中国科学院东北地理与农业生态研究所青年博士基金项目(08H2071)；国家自然科学基金项目(40901096)；吉林省科技发展计划项目(20080128)
作者单位
任春颖 中国科学院东北地理与农业生态研究所,吉林,长春,130012 
张柏 中国科学院东北地理与农业生态研究所,吉林,长春,130012 
王宗明 中国科学院东北地理与农业生态研究所,吉林,长春,130012 
宋开山 中国科学院东北地理与农业生态研究所,吉林,长春,130012 
刘殿伟 中国科学院东北地理与农业生态研究所,吉林,长春,130012 
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中文摘要:
      选取位于吉林省西部的通榆县作为研究区,利用全国第二次土壤普查数据和2006年土壤采样分析数据,结合土地利用数据,研究土地利用方式及其动态变化对县域尺度表层(0~20 cm)土壤养分的影响。结果表明:近20年来通榆县土地利用格局变化显著,表层土壤全量养分显著降低,土壤有机质和速效养分则无显著变化。2006年耕地、林地和草地的土壤有机质、全氮、全钾、速效氮、速效磷含量无显著差异,全磷和速效钾含量差异性显著;除全磷、全钾和速效钾外,盐碱地土壤养分含量均显著低于耕地、林地和草地。除荒地开垦后土壤有机质含量增加,毁草、毁湿开荒以及多年放牧和耕作均造成土壤有机质含量降低;不同土地利用变化过程对土壤全量养分的影响以降低含量为主,而速效养分则以增加含量为主。
英文摘要:
      Taking Tongyu County as a typical study area, this paper evaluated the effects of land use type and its changes on soil nutrients in the surface soil of semiarid area of westem Jilin Province. Field soil sample data and land use data were used to identify land use changes within two typical periods of 1986 and 2006, to examine soil nutrient changes between 1986 and 2006 , and to analyze the relationship between land use changes and soil nutrient changes. The results indicated that the spatial pattem of land use types in Tongyu County had obvious changes in recent 20 years. The area percentage of cropland increased by 53 %，while that of grassland declined from27.3% to 13.5%. The level of soil nu-trients in the surface soil of Tongyu County is very low . Total nitrogen, total phosphorus and total potassium of 2006 de-creased significantly in comparison with 1986, while soil organic matter and available nutrients had no significant differ-ence between 1986 and 2006. Among samples of 2006，significant differences between cropland, grassland and woodland were found on soil nutrients including total phosphorus and available potassium. Except total phosphorus ，total potassium and available potassium, the contents of other soil nutrients in salina land were obviously lower than those in cropland, grassland and woodland. Land use changes had resulted in soil nutrient changes in the study area. Land reclamation led to the increase of soil organic matter, but other land use conversion resulted in the decrease of soil organic matter. Most total nutrients declined，while available nutrients increased after the conversion of land use type.
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