نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسندگان English
A thorough understanding of the spatiotemporal variability of soil properties is crucial for accurately evaluating soil potential and its susceptibility to different management strategies under diverse local conditions. In this regard, soil quality should be regarded as a pivotal factor that exerts a direct and determining impact on both plant productivity and the sustainability of agricultural system. Optimal soil quality plays a fundamental role not only in achieving high plant productivity and yield but also in preserving environmental quality and the health of plants, animals, and humans. Since the use of improper management practices leads to the degradation of suitable soils through erosion, pollution, and physical deterioration, the present study was carried out with the aim of investigating and analyzing the spatial variability patterns of certain physicochemical soil quality indicators under six distinct land use types namely croplands (maize and potato), date palm plantations, Tamarix woodlands, shrublands, fallow fields, and bare lands at the Shahid Beheshti Research Farm, University of Jiroft. For various physical and chemical analyses, collected soil samples (108 samples based on the area of the studied region) were transported to the laboratory. After sample preparation, several physical and chemical properties were measured. Data normality was assessed using the Kolmogorov–Smirnov test, mean comparisons were conducted using Duncan's test, and frequency distributions were analyzed using SPSS software version 17. For variogram calculation and plotting, Variowin 2.2 software was utilized, and interpolation was performed using the kriging method via Variowin. Finally, kriging maps were generated using GIS software version 10. Geostatistical results indicated that all chemical and physical properties of soil quality, except for total nitrogen content, exhibited spatial structure and reached a sill. The findings of this study indicated that all measured physical and chemical soil properties exhibited statistically significant differences (P < 0.05) across the different land use types.Values of pH, total nitrogen (TN), available phosphorus (Pava), available potassium (Kava), and organic matter (OM) were generally lower in cultivated lands (potato and corn fields) compared to other land uses. These results suggest that soil quality under crop production has declined due to the implementation of unsustainable cropping systems. Specifically, sensitive soil properties organic matter (OM), total nitrogen (TN), and available phosphorus (Pava) showed significant improvement in forest, shrubland, palm grove, and fallow land uses. This improvement can primarily be attributed to the development of preserved vegetation cover and minimal tillage practices. Thus, these findings indicate that soil degradation can be controlled by extending the growth period and enhancing vegetation presence, as well as by reducing soil disturbance through tillage operations. We conclude that integrating land uses with appropriate sustainable land management practices is the most effective approach to preserving and restoring soil quality and maintaining ecosystem functionality.
کلیدواژهها English