内蒙古农牧交错带土地利用对土壤性质的影响  

Effects of Land Use Changes on Soil Physi-chemical Properties in Farm-grazing Transition Belt of Inner Mongolia Autonomous Region

作　　者：焦燕[1] 赵江红[1] 徐柱[2] 

机构地区：[1]内蒙古师范大学化学与环境科学学院,呼和浩特010022 [2]中国农业科学院草原研究所,呼和浩特010022

出　　处：《草地学报》2009年第2期234-238,共5页Acta Agrestia Sinica

基　　金：国家重点基础研究发展计划973(2007CB106806)项目资助

摘　　要：为研究农牧交错带土地利用方式对土壤特性的影响,于2007年7月选择位于内蒙古东部农牧交错带太仆寺旗的3种土地利用类型,野外采集土样并进行分析。结果表明：在0~30 cm土层中,土壤有机碳含量、全氮含量、速效钾含量均表现为草地〉榆树林地〉农田;土壤水溶性有机碳含量表现为草地最高,农田次之,林地最小;土壤速效磷含量变化与上述趋势不同,为农田〉草地〉榆树林地。土地利用方式对土壤质地也有影响,与农田土壤和林地土壤相比较,草地土壤的粘粒含量最高,砂砾含量最低。本研究表明在研究区域天然草地具有较好的土壤养分保持能力,是最适合的土地利用类型,可为改善生态环境和当地的可持续发展提供依据。The effects of grassland conversion to cropland and woodland on soil properties were studied in July 2007 in Taipusi County located in the farm-grazing Transition Belt of the Inner Mongolia Autonomous Region using direct field sampling methods. The results show that the influence of land use types on soil properties was significant. Soil organic carbon （SOC）, total nitrogen （TN）, and available potassium （AK） in the 0-30 cm depth were highest in grassland and lowest in cropland. Soil dissolved organic carbon （DOC） in the 0~30 em depth was highest in grassland and lowest in elm woodland. The changing trend of available phosphorus （AP） in the 0-30 em depth was different from the above and highest in cropland and lowest in elm woodland. Land use had significant effects on soil texture too. Grassland soil contained more clay and less sand than other land use types. In summary, grassland in the investigated areas had better maintenance ability of soil nutrients and should be the most appropriate land use type for local environmental amelioration and sustainable development.

关 键 词：农牧交错带 土地利用 土壤养分 

分 类 号：S812.2[农业科学—草业科学]