新邵县岩溶石漠化林地土壤理化特性研究  

Study on Soil Physical and Chemical Properties of Rocky Desertification Woodland in Xinshao County

作　　者：童方平[1] 邓德明 苏振楚 李贵[1] 曾立志 唐坤银[1] 刘振华[1] 

机构地区：[1]湖南省林业科学院,湖南长沙410004 [2]湖南省农林工业堪察设计研究总院 [3]新邵县林业局

出　　处：《现代农业科技》2011年第8期255-256,258,共3页Modern Agricultural Science and Technology

基　　金：国家石漠化综合治理试点科技支撑项目

摘　　要：为修复和恢复石漠化区的生态环境,对新邵县岩溶石漠化林地的土壤理化特性进行研究,并运用改进的内梅罗综合指数法,对石漠化林地的土壤肥力进行了综合评价。结果表明:石漠化土壤呈弱酸性,不同坡位和土层厚度的土壤容重、pH值、土壤有机质、土壤有效磷、土壤碱解氮没有显著差异,不同坡位的土壤速效钾没有显著差异,而不同土层厚度的土壤速效钾有极显著差异。不同坡位0～60 cm土层的土壤容重变异幅度为1.39～1.58 g/cm3,不同坡位0～60 cm土层的土壤有机质其变异幅度为6.47～7.40 g/kg,各坡位以0～20 cm土层的土壤速效钾含量最高,其变异幅度为73.75～111.25 mg/kg,不同坡位土壤碱解氮变异幅度为69.65～77.70 mg/kg。石漠化地上坡、中上坡及中下坡的土壤综合肥力为一般,而下坡的土壤综合肥力则为贫瘠。With the purpose to repair and restore the ecological environment in rocky desertification area,through making a study in soil physical and chemical properties of rocky desertification woodland in Xinshao County,the soil fertility of rocky desertification woodland was appraised with improvement nemero index.The results showed that rocky desertification woodland was weak acidity.The bulk density,pH value,soil organic matter,available phosphorus,available nitrogen in different slopes and soil thickness and available potassium in different slopes were no significant differences.It showed a very significant difference of available potassium in different soil thickness.The soil bulk density variation range was 1.39～1.58 g/cm3 and soil organic matter variation range was 6.47～7.40 g/kg in 0～60 cm layer of different slope positions.The content of available potassium in 0～20 cm layer of different slope positions was the highest,the variation range was 73.75～111.25 mg/kg.In different slope positions,the soil available nitrogen variation range was 69.65～77.70 mg/kg.In rocky desertification woodland,the soil fertility in the uphill,meso-uphill and meso-downhill were general,but the soil fertility in downhill was poor.

关 键 词：土壤理化特性 土壤肥力 石漠化 内梅罗综合指数法 湖南新邵 

分 类 号：S153[农业科学—土壤学]