烟草科技Issue(4)：13-18,6.DOI:10.16135/j.issn1002-0861.20150403
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
摘要
Abstract
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 of 2.823; 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 to 0.050 mm) in soil, as the percentage of clay particle increased by 10%, D values increased by 0.05 units; as the percentage of silt or sand particle increased by 10%, D value decreased by 0.09 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Key words
Tobacco planting soil/Soil particle/Fractal dimensionality/Soil nutrient分类
农业科技引用本文复制引用
李强,张一扬,陈丽鹃,彭奎,解燕,刘加红,周冀衡..植烟土壤颗粒分形特征及与主要养分的关系[J].烟草科技,2015,(4):13-18,6.基金项目
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］。 （）
