نوع مقاله : نامه‌های علمی
نویسندگان
1 استادیار پژوهش، مؤسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران
2 استادیار پژوهش، بخش تحقیقات منابع طبیعی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان مرکزی، سازمان تحقیقات، آموزش و ترویج کشاورزی، اراک، ایران.
3 استادیار پژوهش، مؤسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران.
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
Populus euphratica Oliv tree is one of the tree species that grows naturally in Markazi province along the river bank and areas with high access to underground water. To conduct the research, first, the measures related to the field recognition stage and receiving information on the distribution of P. euphratica fields in Markazi province were carried out by reviewing the available sources, referring to agricultural and natural resources research and education center and general department of natural resources and watershed management. Through field operations, and by surveying the P. euphratica community related to each of the cities of Saveh, Tafresh, Khomein, and Mahalat with the Global Positioning System (GPS) and the use of GPS Fields Area Measure PRO application was located and uploaded to Google Earth, and the exact area of the field was determined. After drawing the P. euphratica fields polygons on Google Earth, files were transferred to ArcMap 10.4 software and converted to an integrated polygon layer in shapefile format. Then the distribution map of P. euphratica fields was prepared for each of the cities. Maps of the slope, aspect, and elevation from the DEMs (digital elevation models), maps of land use and shapefile of main and sub-rivers and waterways, the layer of the distance from the river, and some soil properties of Markazi province were also prepared and were drawn in different classes for each of the P. euphratica fields related to 4 cities. According to the findings of this project, the total area of P. euphratica fields was obtained at 447.27 ha by land surveying, the highest of it belongs to Saveh with 279.25 ha, and the greater length of the river in Saveh is one of the reasons for the increase in the area of P. euphratica fields in this city. There are the P. euphratica fields at an altitude between 1650 m below and 1900 m above sea level and mostly at a distance of fewer than 200 m from the river in all aspects with a slope of less than 8%. In general, P. euphratica fields of the province are established in light to semi-heavy soil texture in acidity between 7.2 - 8.3 with electrical conductivity (EC) less than 1 dS m−1. The findings of the research can play an effective role in the modification, protection, and restoration of the P. euphratica fields site in the degraded areas.
کلیدواژه‌ها [English]
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