Maize Research Institute, "Zemun Polje'', Slobodana Bajića 1, 11185, Belgrade, Serbia.
Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080, Belgrade, Serbia.
Sci Rep. 2020 Aug 12;10(1):13668. doi: 10.1038/s41598-020-70464-6.
This study was conducted to compare soil particle density (ρ), soil total porosity (TP), liquid limit (LL), plastic limit (PL), and plasticity index, and their relations with soil organic matter (SOM), of non-carbonate silty clay Fluvisols under different land uses. Three neighboring land uses were studied: native deciduous forest, arable land, and meadow, managed in the same way for more than 100 years. Soil was collected from 27 soil profiles and from three depths (0-15, 15-30 and 30-45 cm). Land use caused statistically significant but different impacts on soil properties, particularly in the topsoil. The forest topsoil measured the lowest ρ and bulk density (ρ) but the highest SOM and soil water content at PL, compared to meadow and arable soil. Statistically significant linear relationship was observed with the SOM content and ρ (- 0.851**), ρ (- 0.567**), calculated TP (0.567**) and measured TP (- 0.280**). There was a nonlinear relationship between SOM and LL (0.704**) and PL (0.845**) at the topsoil. The findings suggested that SOM content strongly affected ρ, ρ, TP, LL and LP. This regional study showed that the conversion of forestland into agricultural land without appropriate measures to conserve SOM leads to the degradation of physical and rheological soil properties.
本研究旨在比较不同土地利用方式下非碳酸盐粉壤土淋溶土中土壤颗粒密度（ρ）、土壤总孔隙度（TP）、液限（LL）、塑限（PL）和塑性指数及其与土壤有机质（SOM）的关系。研究了三种相邻的土地利用方式：原始落叶林、耕地和草地，它们以相同的方式管理了 100 多年。从 27 个土壤剖面和三个深度（0-15、15-30 和 30-45cm）采集了土壤。土地利用方式对土壤性质产生了统计上显著但不同的影响，特别是在表土中。与草地和耕地相比，森林表土的 ρ 和容重（ρ）最低，但 SOM 和 PL 处的土壤含水量最高。与 SOM 含量和 ρ（-0.851**）、ρ（-0.567**）、计算的 TP（0.567**）和实测的 TP（-0.280**）呈显著线性关系。在表土中，SOM 与 LL（0.704**）和 PL（0.845**）之间存在非线性关系。研究结果表明，SOM 含量强烈影响 ρ、ρ、TP、LL 和 PL。本区域研究表明，将林地转化为农业用地而不采取适当措施保护 SOM 会导致土壤物理和流变学性质的退化。
