【摘要】 为明确湘南稻作烟区植烟土壤有效硼的时空变异特征,分别于2000年和2015年在湖南郴州烟区采集土壤样品测定了有效硼含量(质量分数),并利用经典统计学、地统计学等方法对该区域土壤有效硼的时空变异及其影响因素进行了分析。结果表明:从基本统计特征来看,经过15年硼肥的连续施用,湖南郴州烟区土壤有效硼含量均值由2000年的0.17 mg/kg增加到2015年0.55 mg/kg,增幅达223.53%;从时空分布的变化来看,2015年土壤有效硼含量处于"中等"和"高"等级的土地面积显著增加,分别为80.49%和19.51%,而"极低"和"低"等级的土地面积则大幅减少,分别为67.13%和32.87%。土壤有效硼含量与地形、地貌、成土母质、土壤酸碱度及有机质含量关系密切。更多还原

【Abstract】 In order to clarify the spatial-temporal variability of available boron(B) in tobacco-planting soils of paddy-upland rotation fields in southern Hunan, soil samples were collected from Chenzhou tobacco-planting areas in 2000 and 2015 separately. The contents of available B in soils were determined, and the spatial-temporal variability of available B and its influence factors were analyzed by classical statistics and geostatistics methods. The results from statistical characteristics showed that, after continuous application of B fertilizer in Chenzhou tobacco-planting areas for 15 years, the average content of soil available B increased from 0.17 mg/kg in 2000 to 0.55 mg/kg in 2015, an increase of 223.53%. On spatio-temporal distribution, the areas with"moderate"and"high"available B contents in 2015 significantly increased by 80.49% and 19.51%,while those with "extremely low" and "low" available B contents significantly decreased by 67.13% and32.87%, respectively. The available B content in soils was closely related to landform, topography, soil parent material, soil pH and soil organic matter.更多还原