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تاثیر احیاء وَرکزارها با یونجهکاری دیم بر ترسیب کربن (مطالعه موردی: استان همدان) | ||
| تحقیقات مرتع و بیابان ایران | ||
| مقاله 5، دوره 26، شماره 2، تیر 1398، صفحه 302-312 اصل مقاله (1.35 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijrdr.2019.119353 | ||
| نویسندگان | ||
| بختیار فتاحی* 1؛ سهیلا آقا بیگی امین2؛ علیرضا ایلدرمی3؛ مائده قربان پور دلیوند4 | ||
| 1استادیار، گروه مرتع و آبخیزداری، دانشکده منابع طبیعی و محیط زیست، دانشگاه ملایر، همدان، ایران | ||
| 2استادیار، گروه منابع طبیعی، دانشکده کشاورزی، دانشگاه رازی، کرمانشاه، ایران | ||
| 3دانشیار، گروه مرتع و آبخیزداری، دانشکده منابع طبیعی و محیط زیست، دانشگاه ملایر، همدان، ایران | ||
| 4کارشناس ارشد مرتعداری، دانشکده منابع طبیعی و محیط زیست، دانشگاه ملایر، همدان، ایران | ||
| چکیده | ||
| تغییر کاربری و رها شدن اراضی، چرای مفرط و ازدیاد و گسترش گونههای ناخواسته از مهمترین چالشهای مراتع کشور هستند. به همین منظور در این تحقیق تلاش شدهاست که با ارائه یک راهکار اصلاحی واحد با چالشهای مذکور مبارزه شود؛ بنابراین از گونه یونجه دیم چند ساله برای کشت در مراتع تخریب شده پوشیده از ورک یا اراضی رهاشده استفاده شد تا ضمن احیا مراتع، موجبات ترسیب کربن هوا به مقدار چشمگیر در اکوسیستم احیاشده با این گونه را نیز فراهم کند؛ بنابراین سه مرتع: احیاشده با یونجه، چرای متوسط و تخریب شده در منطقه حفاظت شده لشگردر ملایر در نظر گرفته شد. در هر یک از این مراتع سایتهایی برای نمونهبرداری انتخاب شد. اندازه و تعداد پلاتها به ترتیب به روش سطح حداقل و روش آماری تعیین شدند. زیتوده هوایی، زیرزمینی و لاشبرگ هر پلات جمعآوری گردید. نمونه برداری از خاک در پلاتها نیز به صورت ترکیبی انجام شد و اندازه گیری کربن ترسیب شده نمونه ها در آزمایشگاه انجام شد. همچنین نمونه برداری خاک از دو لایه 30-15 و 15-0 سانتیمتر نیز تهیه شد و کربن آنها اندازه گیری شد. سه مرتع مورد نظر به روش آنالیز واریانس یکطرفه مقایسه شدند و نتایج نشان داد که میزان ترسیب کربن در اکوسیستم مرتع احیاشده با یونجه دیم چندساله (ton/ha 8/36) بعد از گذشت 4 سال حدود 25/1 برابر مرتع چرای متوسط (ton/ha 27/29) و 71/1 برابر مرتع تخریب شده (ton/ha 54/21) می باشد و این نتایج نشان میدهد که با احیا مراتع تخریب شده، هم اهداف حفاظت اراضی محقق می شود و هم توانایی اکوسیستم در ترسیب کربن افزایش خواهد یافت. | ||
| کلیدواژهها | ||
| ورک؛ اصلاح مراتع؛ تغییرکاربری؛ چرا | ||
| عنوان مقاله [English] | ||
| Effect of rehabilitation of Hulthemia-lands with rainfed alfalfa on carbon sequestration (case study: Hmedan provinse) | ||
| نویسندگان [English] | ||
| Bakhtiar Fatahi1؛ Soheila Aghabeigiamin2؛ Alireza Ildoromi3؛ Maedeh ghorbanpour Dalivand4 | ||
| 1Assistant Professor, Depatrment of Range and Watershed Management, Faculty of natural resources and environment, Malayer university, Hamadan,Iran | ||
| 2Assistant Professor, Depatrment of Natural resources, Faculty of Agriculture, Razi university, Kermanshah,Iran | ||
| 3Assosiate Professor, Depatrment of Range and Watershed Management, Faculty of natural resources and environment, Malayer university, Hamadan,Iran | ||
| 4M.Sc. Postgraduated of Range Management, Depatrment of Range and Watershed Management, Faculty of natural resources and environment, Malayer university, Hamadan,Iran | ||
| چکیده [English] | ||
| Land use change, land abandonment, overgrazing, expansion and spread of exotic species are of the most important challenges in the rangelands of the country. For this reason, in this research, it has been attempted to address the challenges by presenting a single improvement solution. Therefore, the perennial rainfedd alfalfa was used for cultivation in degraded rangelands or abandoned lands for both goals of rangeland reclamation and carbon sequestration. Three rangelands were studied in the protected area of Lashgardar-Malayer reclaimed rangeland via alfalfa, medium grazing, and degraded rangelands. In each of these rangelands, sites were selected for sampling. The size and number of plots were determined by the minimal area and statistical method. In each plot, the aboveground and underground biomass and litter were collected. Soil sampling was performed in the plots and the measurement of carbon sequestration was conducted in the laboratory. Soil samples were collected from two layers of 0-15 and 15-30 cm and their carbon was measured. The three study rangelands were compared using a One-Way ANOVA analysis, and the results showed that the amount of carbon sequestration in the rangeland reclaimed with perennial rainfed alfalfa (36.8 ton / ha) after 4 years was around 1.25 fold higher than the medium grazing rangeland (29.27 ton / ha) and 1.71 fold as compared with the degraded rangeland (21.54 ton / ha). These results indicate that reclamation of degraded rangelands causes to achieve land conservation goals and increase the ability of the ecosystem for carbon sequestration. | ||
| کلیدواژهها [English] | ||
| Hulthemia, Range Improvement, Grazing, Land Use | ||
| مراجع | ||
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