Interpretation of data on the aggregate composition of typical chernozems under different land use by cluster and principal component analyses
- 作者: Kholodov V.1, Yaroslavtseva N.1, Lazarev V.2, Frid A.1
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隶属关系:
- Dokuchaev Soil Science Institute
- Kursk Research Institute of Agroindustrial Production
- 期: 卷 49, 编号 9 (2016)
- 页面: 1026-1032
- 栏目: Soil Physics
- URL: https://journals.rcsi.science/1064-2293/article/view/223502
- DOI: https://doi.org/10.1134/S1064229316090076
- ID: 223502
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详细
Cluster analysis and principal component analysis (PCA) have been used for the interpretation of dry sieving data. Chernozems from the treatments of long-term field experiments with different land-use patterns— annually mowed steppe, continuous potato culture, permanent black fallow, and untilled fallow since 1998 after permanent black fallow—have been used. Analysis of dry sieving data by PCA has shown that the treatments of untilled fallow after black fallow and annually mowed steppe differ most in the series considered; the content of dry aggregates of 10–7 mm makes the largest contribution to the distribution of objects along the first principal component. This fraction has been sieved in water and analyzed by PCA. In contrast to dry sieving data, the wet sieving data showed the closest mathematical distance between the treatment of untilled fallow after black fallow and the undisturbed treatment of annually mowed steppe, while the untilled fallow after black fallow and the permanent black fallow were the most distant treatments. Thus, it may be suggested that the water stability of structure is first restored after the removal of destructive anthropogenic load. However, the restoration of the distribution of structural separates to the parameters characteristic of native soils is a significantly longer process.
作者简介
V. Kholodov
Dokuchaev Soil Science Institute
编辑信件的主要联系方式.
Email: vkholod@mail.ru
俄罗斯联邦, per. Pyzhevskii 7, Moscow, 119017
N. Yaroslavtseva
Dokuchaev Soil Science Institute
Email: vkholod@mail.ru
俄罗斯联邦, per. Pyzhevskii 7, Moscow, 119017
V. Lazarev
Kursk Research Institute of Agroindustrial Production
Email: vkholod@mail.ru
俄罗斯联邦, Cheremushki 10, Kursk district, Kursk oblast, 305526
A. Frid
Dokuchaev Soil Science Institute
Email: vkholod@mail.ru
俄罗斯联邦, per. Pyzhevskii 7, Moscow, 119017