نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشیار دانشکده کشاورزی، دانشگاه شهید مدنی آذربایجان، تبریز، ایران
2 دانشجوی کارشناسی دانشکده کشاورزی دانشگاه شهید مدنی آذربایجان، تبریز، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Soil quality information plays an important role in land use planning and resource management, and knowledge about the spatial distribution of this information is needed in sustainable land management and agricultural production. In this research, a soil pH map was prepared using the information of 53 points in the provinces of East and West Azerbaijan. The zoning map was prepared with three geostatistical approaches (kriging with sensitivity analysis of semivariogram), regression (linear and fuzzy) and a combination of two approaches, fuzzy and kriging. In the regression approach, input layers including soil texture, digital elevation map, slope and aspect were considered. In the prepared maps, the northern areas of the study area have low pH values, and the more you move to the southwest, the pH values increase. The comparison of the approaches showed that the accuracy of the linear regression performance is low, so that the increase of the Theil's inequality coefficient from kriging and fuzzy regression to linear regression is equal to 55.55 and 27.27%, respectively. The values of the Coefficient of Residual Mass in the two methods of kriging and fuzzy regression are very close to each other, but the value of the Coefficient of Residual Mass in the combined method has decreased compared to the two methods (about 57.57%). The significance level of the LSD test at the level of one percent of the combined approach to kriging and fuzzy has decreased by 63.24% and 67%, respectively, that is, the combined approach is closer to the observational data and this shows the accuracy of the combined method. The slope of the trend line on the graph of pH and height was positive in 73 randomly extracted points, which indicates an increase in pH in high areas. Preparation of soil pH zoning map can serve as a guide in determining the right place for cultivation or choosing the right plant for cultivation based on soil pH in the region.
کلیدواژهها [English]