曲靖植烟土壤有效微量元素的空间变异和影响因子  

Spatial Variability and Influencing Factors of Available Microelements in Tobacco Growing Soils in Qujing

作　　者：李强 周冀衡 张永安[3] 吴立柱[2] 张拯研[2] 张一扬[1] 解燕[2] 刘加红 

机构地区：[1]湖南农业大学烟草研究院,湖南长沙410128 [2]云南省烟草公司曲靖市公司,云南曲靖655000 [3]福建中烟工业有限责任公司,福建厦门361012

出　　处：《烟草科技》2013年第10期63-67,79,共6页Tobacco Science & Technology

基　　金：中国烟草总公司科技开发计划项目:曲靖市“天香工程”特色优质烟叶开发与研究(110200902035);国家烟草专卖局科技项目:卷烟品牌导向的曲靖烟叶生产体系研究(110200801036)

摘　　要：为了明确曲靖烟区土壤有效微量元素的空间分布特征及其影响因子，采用GPS定位技术进行了大规模的土壤取样测定，并分析了曲靖植烟土壤有效态微量元素的总体特征和空间变异特征，采用普通Kriging插值法绘制了空间分布图，研究了微量元素含量的影响因子。结果表明：曲靖植烟土壤微量元素变异程度中等；土壤微量元素均表现为各向异性分布，土壤有效硼的空间变异主要受随机因子影响，其余5种有效态微量元素同时受结构性因子和随机性因子的影响；曲靖植烟土壤有效硼普遍极度缺乏，很低（〈0．25mg／kg）和低（0．25—0．50mg／kg）的植烟土壤面积分别占7．74％和68．20％，有效锌含量中等偏上，低（〈1．5mg／kg）的植烟土壤面积仅为1．32％，有效铜、有效铁和有效锰含量十分丰富，土壤有效钼区域差异较大，研究区中28．38％的区域有效钼缺乏；海拔高度、土壤类型、土壤pH、有机物料投入量和前茬作物均是影响烟区土壤有效态微量元素含量的重要因子。In order to investigate the spatial distribution and influencing factors of available microelements in tobacco growing soil, 2088 soil samples were collected from Qujing tobacco growing areas by adopting GPS technology, the general characteristics and spatial variability of available microelements in the soil samples were analyzed, and the spatial distribution of available microelements was mapped with ordinary Kriging interpolation. The factors affecting available microelements were also studied. The results indicated that all the available microelements were of moderate variability and distributed anisotropically. The spatial variance of available B was mainly affected by random factors, while that of other available microelements was affected by both structural and random factors. Available B was extremely deficient throughout Qujing, the areas with very low （〈0.25 mg/kg） and low （0.25-0.50 mg/kg） available B accounted for 7.74% and 68.20%, respectively; available Zn was above moderate, the areas with low （〈1.5 mg/kg） available Zn only accounted for 1.32%; thecontents of available Cu, available Fe and available Mn were very rich; the contents of available Mo presented large regional differences, the areas lacking of available Mo accounted for 28.38%. Altitude, soil type, soil pH, organic fertilizer input and preceding crop were main factors affecting the available microelements in tobacco growing soil.

关 键 词：植烟土壤 有效态微量元素 地统计学 空间变异 影响因子 

分 类 号：S158[农业科学—土壤学] S572[农业科学—农业基础科学]