多尺度多分辨率破碎方法评价土壤结构的原理及其应用
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中国博士后科学基金资助项目(20080431104)


Theory and application of multi-scale and multi-resolution fragmentation method for soil structure evaluation
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    摘要:

    在数学描述上,应力小波破碎分析具有小波分析相同的形式,因此,能够将小波分析的理论进行重新阐释,以使其适用于破碎研究。结果发现,应力小波方法在描述破碎体结合面的结合强度方面具有特殊性。同时表明土壤破碎体分形维数是土壤结构的宏观统计学指标,而土壤破碎体的单粒能量消耗值是土壤结构的微观应力小波指标,只有综合使用这两个指标才能够全面地评价土壤的结构状态。在不同季节进行相同的机械耕作处理下,南京水田农地的耕作层土壤结构表现差异明显。秋季耕作土壤的应力小波指标明显优于春季耕作的土壤,同时,秋季耕作土壤的分形维数也远大于春季耕作的土壤。

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    The stress-wavelets method for soil fragmentation analysis has the same mathematical form with the wavelets method. Therefore, the wavelets theories can be re-interpreted, and then it applies to soil fragmentation research. Speciality was revealed from the results by applying stress-wavelets method to describe soil surface contacting energies. It also showed that fragment fractal dimension was a macroscopic statistical index for soil structure, while per fragment energy consumption was related to microscopic stress-wavelets index. A combination of those two indices gave a comprehensive evaluation of soil structural properties. The structure of paddy soil in Nanjing had significiant difference under the same treatment but in different seasons. The stress-wavelets index was well improved in autumn-tilled soil when compared with spring-tilled soil, and the fragment fractal dimension was also higher in autumn-tilled soil.

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丁启朔,丁为民,潘根兴.多尺度多分辨率破碎方法评价土壤结构的原理及其应用[J].农业工程学报,2008,24(12):132-136.

Ding Qishuo, Ding Weimin, Pan Genxing. Theory and application of multi-scale and multi-resolution fragmentation method for soil structure evaluation[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE),2008,24(12):132-136.

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  • 收稿日期:2007-03-20
  • 最后修改日期:2007-09-16
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