【摘要】 为探明湘西植烟土壤有效硼时空变异特征,为湘西烟区硼素营养管理提供科学依据,分别于2000年和2015年在湘西烟区采集土壤样品并测定了有效硼含量,利用经典统计学、地统计学等方法,对该地土壤有效硼及其影响因素进行了研究。结果表明:有效硼含量均值由2000年的0.21 mg/kg增加到2015年0.64 mg/kg,增幅达204.76%;2015年土壤有效硼含量"适宜"和"高"等级的面积大幅增加,分别增加了73.27%和18.39%,而"低"等级则大幅下降,比2000年下降了91.19%。海拔高度、有机质、土地利用方式、轮作方式、地形和土壤母质均对土壤有效硼含量有显著影响,其中海拔高度的解释能力最大,可以解释10.2%的土壤有效硼变异,土壤母质独立解释能力最小,仅解释2.4%的土壤有效硼变异,6项指标累计可解释26.5%的土壤有效硼变异。更多还原

【Abstract】 To explore the temporal and spatial characteristics of available boron,and to provide scientific basis for the management of boron nutrition in Xiangxi tobacco region,the soil samples were collected and the content of available boron was measured in 2000 and 2015,respectively.The temporal and spatial variation of available boron in the area and its influence factors were analyzed by the methods of classical statistics and geostatistics.The results showed that the average amount of available boron increased from 0.21 mg/kg in 2000 to 0.64 mg/kg in 2015,the increase rate was 204.76%. The area of "suitable" and "high" grade of soil available boron in 2015 increased significantly by 73.27% and 18.39%,respectively,while the "low" level dropped sharply by 91.19%.Altitude,organic matter,land use,rotation,topography and soil parent material all had significant effects on soil available boron content.Altitude had the greatest explanatory power,which could explain 10.2% of soil available boron variation,and the independent explanatory power of soil parent material was the smallest,explaining only 2.4% of soil available boron variation,and the accumulation of 6 indicators can explain 26.5% of the variation of soil available boron.更多还原