检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:张庆利[1] 潘贤章[1] 王洪杰[1] 刘付程[1] 史学正[1]
机构地区:[1]中国科学院南京土壤研究所,江苏南京210008
出 处:《土壤通报》2003年第6期493-497,共5页Chinese Journal of Soil Science
基 金:江苏省自然科学基金项目(编号BK2002504);中国科学院知识创新工程领域前沿项目(编号ISSASTP0201)的资助
摘 要:用修改后的内梅罗公式作为土壤质量的评价模型,将传统的统计方法与地统计学方法及GIS技术相结合,研究了金坛市土壤质量的空间分异规律,对金坛市土壤质量进行了定量化的评价。结果表明,金坛市土壤全氮以差级水平为主,pH、速效磷、速效钾、CEC和有机质均以中等级以上水平为主,综合肥力质量以中等水平为主;相对来说,全氮含量总体较低是金坛市土壤肥力的主要限制因子,pH值较低和速效磷水平较低是部分地区土壤生产力的主要限制性因子;金坛市土壤分质量及综合肥力质量的空间分布总体上具有以下特征:在东西方向上,中部纵贯全市南北的丹金溧漕河两侧的低洼圩区土壤质量指数相对较高,东部的高亢平原区次之,西部的丘陵区土壤质量指数最低;南北方向上,土壤质量指数西北低,向东南逐渐升高。土壤质量指数最高的区域主要分布于洮湖周围的河口区。金坛市土壤质量指数的这种分布特点明显与地形地势、径流方向和土地利用等有关,而地形地势是决定金坛市土壤质量空间分布的最根本的原因。Spatial distribution and quantitative evaluation of soil fertility quality in Jintan county, Jiangsu province, have been studied through combinating the methods of statistics, geostatistics and GIS with the changed Nemoro formula as evaluation model.The results showed a low level of soil total nitrogen and a high level of soil pH, available phosphorus, available potassium, CEC and organic matter. The low pH and available phosphorus content may be comparative limiting factors of soil fertility in some area of Jintan county. As for the spatial distribution of soil qualities in Jintan county, it showed that soil quality index are the highest at the catchment of DanJinLi river area, followed by the plain in east Jintan county and then by the highland in west; it also showed that soil quality index became higher from northwest to southeast in Jintan county and the highest soil quality index was found in the influx area around the Lake Tao. The distributions of soil quality index in Jintan county are strongly related to topography, river flow and landuse patterns in Jintan county, but the topography in the county is the determinant of the distribution of soil quality index in Jintan county.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.57