期刊论文

Assessment and Spatial Variation of Soil Fertility Indices in Tobacco Field After Land Consolidation in Central-Southern Hunan Province

中文

水土保持研究

1005-3409

2017

24

2

105-111

10.13869/j.cnki.rswc.2017.02.018

湖南省教育厅重点项目（15A085） 湖南省烟草公司2014年度重点科技项目（14-16ZDAa01） 湖南省烟草公司邵阳市公司资助项目（12143）

本校为第一机构

掌握土地整理区土壤养分特征已成为烟田快速培肥和提升土壤质量的首要问题。采用GIS与地统计学相结合的方法,评价了土地整理后烟田土壤养分等肥力指标的适宜性等级状况及其空间变异特征。结果表明:研究区土壤偏酸,有机质、碱解氮含量普遍缺乏,存在较大面积的缺钾现象;各肥力指标均属于中等变异,变异系数大小顺序依次为有效磷>速效钾>碱解氮>有机质>全氮>全磷>全钾>pH值。有机质和速效钾的变异函数比较符合指数模型,全钾、碱解氮用高斯模型拟合效果好,而pH值、全磷、全氮和有效磷则以球状模型拟合效果最佳。肥力指标的块金系数[C0/(C0+C)]中,土壤有机质、全钾、碱解氮分别为0.903,0.998,0.823,空...

It is significant to explore soil nutrient features in tobacco field for fertilizer application and soil quality improvement in land consolidation area.The assessment and spatial variation of soil fertility indices in tobacco field after land consolidation had been explored based on a combination of geostatistics with GIS.The results showed that soil pH was relatively lower,most of soils were lacking organic matter(OM)and available nitrogen(AN)as well as potassium;all of soil fertility indices belonged to middle-grades variability and variation coefficients decreased in the order:available pho...