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东北黑土无机颗粒和有机无机复合体的分形特征

ISSN号：1000-2421
期刊名称：《华中农业大学学报》
时间：0
分类：S153.67[农业科学—土壤学;农业科学—农业基础科学]
作者机构：[1]内蒙古民族大学分析测试中心,通辽028000, [2]吉林农业大学资源与环境学院/吉林省生态恢复与生态系统管理省部共建国家重点实验室培育基地,长春130118, [3]内蒙古民族大学学报编辑部,通辽028000
相关基金：国家公益性行业（农业）科研专项（200903001）; 内蒙古教育厅高校科研基金（NJZY11015）; 内蒙古民族大学博士启动资金（BS262）; 内蒙古民族大学科研创新团队建设计划项目（NMD10-03）

关键词：黑土, 无机颗粒, 有机无机复合体, 分形维数, 土壤肥力, black soil, inorganic particle, organic-inorganic complex, fractal dimension, soil fertility

中文摘要：

利用颗粒分形理论对东北黑土土壤无机颗粒和有机无机复合体的分形维数进行计算,并分析其分布特征以及与土壤肥力的关系。结果表明：东北黑土无机颗粒分形维数主要分布在2.80～2.90,与各粒级均呈极显著相关。有机无机复合体的分形维数主要分布在2.66～2.93,与黏、粉粒级有机无机复合体分别呈极显著正相关和负相关。无机颗粒和有机无机复合体的分形维数间的回归方程y=88.18x-60.73x2＋10.57x3,表明无机颗粒复合有机质可降低土壤的分形维数,但受低温的影响,也可能使土壤复合度降低,进而增加土壤的分形维数。土壤颗粒的分形维数与肥力的相关分析证实无机颗粒复合有机质后,可增强土壤养分的保蓄能力,并在养分释放过程中起到缓释作用。

英文摘要：

Soil structure is the material base of soil fertility and has an important significance in soil fertility.In order to study the relationships between soil particles and the fertility of black soil in northeast China,fractal dimensions of soil inorganic particles and complex were calculated by the particles fractal theory.The distribution characteristics of black soils in northeast China and its relationships with soil fertility were analyzed as well.The results showed that the fractal dimensions of black soil inorganic particles in northeast China were 2.80-2.90,significantly correlated with the entire size fraction.The fractal dimensions of complex were 2.66-2.93,correlated positively with clay and negatively with silt complexes.The regression equation（y=88.18x-60.73x2＋10.57x3）between the fractal dimension of inorganic particles and complex showed that inorganic particles and complex organic could decrease the fractal dimension,and might decrease soil complex degree because of low temperature and increase the fractal dimension of soil.Association analysis between the fractal dimension of soil particles and the fertility confirmed that inorganic particles and complex organic could increase soil nutrients storage capability,and might release nutrients gradually in the process of mineralization.It can be concluded that the fractal theory could be taken as a quantitative indicator explaining the mechanisms of inorganic compound particles and soil structure and indicating fertility characteristics under the conditions of the fractal dimension of soil.