植烟土壤颗粒分形特征及与主要养分的关系  

Fractal Dimensionality of Tobacco Planting Soil Particles and its Relationships with Main Nutrients in Soil

作　　者：李强 张一扬[1] 陈丽鹃[1] 彭奎 解燕[3] 刘加红 周冀衡[1] 

机构地区：[1]湖南农业大学烟草研究院,长沙市农大路1号410128 [2]川渝中烟工业有限责任公司 [3]云南省烟草公司曲靖市公司,云南省曲靖市官坡巷52号655000

出　　处：《烟草科技》2015年第4期13-18,共6页Tobacco Science & Technology

基　　金：云南省烟草公司项目"曲靖市精益烟叶生产研究与应用"(2014YN24);湖南农业大学青年科学基金项目"植烟土壤养分空间变异及丰缺评价研究--以宁乡烟区为例"(12QN12);川渝中烟工业有限责任公司"油菜轮作体系下的优质烟叶生产技术研究及应用"[2013)164-22]

摘　　要：为给烟区土壤理化性状评价提供新的方法,采用GPS定位技术,在云南省陆良烟区采集土壤样品341个,运用土壤颗粒质量分形模型计算了烟区耕层土壤颗粒质量分形维数D值,并分析了分形维数的总体特征、分布规律及其与土壤质地、颗粒分布和土壤养分的关系。结果表明,土壤颗粒质量分形维数D值在2.524-2.928之间,平均为2.823,依次为轻粘土〉重壤土〉中壤土〉轻壤土,土壤质地越粘重,分形维数越大;土壤颗粒质量分形维数与土壤粘粒含量（质量分数）呈极显著正相关关系,与粉粒及砂粒含量呈极显著负相关关系,粘粒含量每增加10%,分形维数D值增加0.05个单位,粉粒含量或砂粒每增加10%,分形维数D值分别下降0.09和0.06个单位,土壤颗粒质量分形维数在一定程度上可直观地反映土壤颗粒构成;分形维数D值与有机质、全氮、全磷、全钾、碱解氮和速效钾含量（质量分数）极显著正相关,与有效磷含量极显著负相关,土壤颗粒质量分形维数在一定程度上可用于表征土壤的养分状况。By GPS positioning, 341 tobacco planting soil samples were collected from Luliang County in Yunnan Province. The fractal dimensionality, D value, of soil particle mass in plow layer was calculated with the fractal model of soil particle mass, the general characteristics,distribution, and its relationships with the texture, particle distribution and nutrients of soil were analyzed. The results indicated that D values ranged from 2.524 to 2.928 with the mean value of2.823; soil types in the order of D value were light clay〉 heavy loam 〉medium loam 〉light loam; D value extremely significantly positively correlated to the mass percentage of clay particle（diameter 0.002 mm） in soil, while extremely significantly negatively correlated to the percentages of sand particle（diameter 0.050 mm） and silt particle（diameter from 0.002 to0.050 mm） in soil, as the percentage of clay particle increased by 10%, D values increased by0.05 units; as the percentage of silt or sand particle increased by 10%, D value decreased by0.09 or 0.06 units, respectively. D value of soil particle mass can directly reflect the constitution of soil particles to a certain extent. D value extremely significantly positively correlated to the contents of organic matter, total N, total K, total P, alkali-hydrolyzable N and available K, while extremely significantly negatively correlated to the content of available P in soil. The fractal dimensionality of soil particle mass can be used to characterize the nutrient status of soil.

关 键 词：植烟土壤 土壤颗粒 分形维数 土壤养分 

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