ABSTRACT

Changes in land use are very important factors affecting soil quality and especially the concentration and stock of soil organic carbon (SOC) and total nitrogen (TN). Very little is known about changes in spectroscopic properties of SOM after conversion of forestland to cropland. Therefore, the main aim of this study was to determine impact of agriculture on the concentration and stock of SOC and TN as well as spectroscopic properties of SOM in the topsoil horizons of Retisols in the Carpathian Foothills in southern Poland. Topsoil Ap horizons of arable soils are characterized by a significantly lower concentration of SOC and TN in comparison with topsoil Oi and Ah horizons of forestland soils. Topsoil Ap horizons feature higher SOC and TN stocks than topsoil Oi and Ah horizons. Significantly higher concentrations of SOC and TN in Oi horizons in comparison with Ah and Ap horizons are responsible for significantly higher mean absorbance values of all FTIR-ATR absorption bands originating from SOM in Oi horizons versus Ah and Ap horizons. Significantly higher concentrations of SOC and TN in Ah horizons of forestland soils versus those in Ap horizons of arable soils do not significantly affect mean absorbance values of FTIR-ATR bands.

摘要

土地利用变化是影响土壤质量特别是土壤有机碳（SOC）和全氮（TN）浓度和储量的重要因素。关于林地转化为农田后 SOM 光谱特性的变化知之甚少。因此，本研究的主要目的是确定农业对波兰南部喀尔巴阡山麓 Retisols 表土层中 SOC 和 TN 的浓度和存量以及 SOM 的光谱特性的影响。与林地土壤的表土 Oi 和 Ah 层相比，可耕土壤的表土 Ap 层的特征在于 SOC 和 TN 的浓度显着降低。表土 Ap 层具有比表土 Oi 和 Ah 层更高的 SOC 和 TN 库。与 Ah 和 Ap 视界相比，Oi 视界中 SOC 和 TN 的浓度显着更高是导致源自 Oi 视界中 SOM 的所有 FTIR-ATR 吸收带的平均吸光度值显着高于 Ah 和 Ap 视界的原因。与耕地土壤 Ap 层相比，林地土壤 Ah 层中 SOC 和 TN 的浓度显着更高，但不会显着影响 FTIR-ATR 波段的平均吸光度值。