中国主要土壤类型的土壤容重传递函数研究

发布时间：2019-04-20 10:52

【摘要】：由于我国大多数土壤数据库缺失或部分缺失土壤容重数据,利用土壤其他属性来预测土壤容重具有重要意义。我国土壤类型多样,已有的土壤容重传递函数在不同土壤类型中的适用性也值得进一步探讨。本文基于我国现有的土壤数据库,对已有的两种土壤容重传递函数在不同土壤类型(土纲)中的预测精度与适用性进行评估,最后通过SPSS进行回归分析建立我国主要土壤类型最适宜的容重传递函数。研究结果表明,已有的两种土壤容重传递函数应用于部分土壤类型时预测精度不高,但基于土壤系统分类的数据分组后建立的容重传递函数能够明显提高预测精度。新建的容重传递函数对有机土、铁铝土、潜育土、均腐土、富铁土、淋溶土、雏形土、新成土和变性土土壤容重的预测精度较高,但人为土、盐成土和干旱土土壤容重传递函数的预测精度整体偏低,在应用时需要慎重。在利用土壤容重传递函数时一定要注意研究区及适用范围。
[Abstract]:Due to the lack of soil bulk density data in most soil databases in China, it is of great significance to use other soil properties to predict soil bulk density. There are many soil types in China, and the applicability of the existing transfer function of soil bulk density in different soil types is also worthy of further discussion. Based on the existing soil database in China, the prediction accuracy and applicability of two existing soil bulk density transfer functions in different soil types (soil classes) are evaluated in this paper. Finally, the most suitable bulk weight transfer function of the main soil types in China was established by SPSS regression analysis. The results show that the prediction accuracy is not high when the two existing soil bulk density transfer functions are applied to some soil types, but the volume density transfer function based on data grouping based on soil system classification can significantly improve the prediction accuracy. The newly built bulk density transfer function can predict the bulk density of organic soil, Fe-bauxite, latent soil, putrefied soil, iron-rich soil, leached soil, embryonic soil, newly formed soil and denatured soil with high precision, but artificial soil. The prediction accuracy of the transfer function of soil bulk density in salt-formed soil and arid soil is on the whole low, so it is necessary to be careful in its application. When making use of the transfer function of soil bulk density, we must pay attention to the study area and the scope of application.
【作者单位】：内江师范学院地理与资源科学学院;河南农业大学林学院;
【基金】：国家自然科学基金项目(41401235) 四川省教育厅重点项目(14ZA0241)资助~~
【分类号】：S152.5

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