【摘要】 以浏阳市2000年和2015年植烟土壤为研究对象,利用经典统计学方法和地统计学等方法,研究了其土壤中部分微量元素的时空变异特征。结果表明,15年间土壤有效锌和有效硼的含量分别增加了1.40 mg/kg、和0.48 mg/kg,增幅分别为70.35%和218.18%,土壤有效钼含量下降了0.01 mg/kg,降幅为14.29%。从空间分布来看,土壤有效锌含量"低"和"适宜"等级的面积减少,"高"等级的面积大幅增加;土壤有效硼含量"极低"和"低"等级的面积消失,新增较大的"适宜"和"高"等级的面积;土壤有效钼含量"极低"和等级的面积大幅增加,"低"等级的面积大幅下降。更多还原

【Abstract】 The major trace elements in cultivated soils of Liuyang tobacco-growing areas in 2000 and 2015 was studied by using classical statistical methods and geostatistics to find out the spatial and temporal variation characteristics. The results showed that the contents of available Zn and B in soil increased by 1.40 mg/kg and 0.48 mg/kg in the past 15 years, the increasing rate was 70.35% and 218.18% respectively; the contents of available Mo in soil decreased by 0.01 mg/kg and 14.29%. From the spatial distribution, the areas of "low" and "suitable" grade of available Zn in soil decreased, and the "high" grade increased. The area of "extremely low" and "low" grade of soil available B disappeared, and the area of "suitable" and "high" grade increased. The areas of "extremely low" and "suitable" grade of available Mo increased, and the "low" grade decreased.更多还原