نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار پژوهش، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان مرکزی، سازمان تحقیقات، آموزش و ترویج کشاورزی، اراک، ایران
2 دانشیار پژوهش، بخش تحقیقات مرتع، موسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران
3 استادیار پژوهش، مؤسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران
چکیده
در این پژوهش به ارزیابی اولیه از ظرفیت ذخایر کربن رویشگاههای محل پراکنش دو گونه گرگ‌تیغ (Lycium depressum Stocks) و قیچ (Zygophyllum fabago L.) در اراضی شور حاشیه کویر میقان اراک پرداخته شد. برای اندازهگیری پارامترهای مختلف گیاهی از طرح نمونه‌برداری تصادفی- سیستماتیک استفاده شد. برای تعیین بیوماس هوایی و زیرزمینی، به روش قطع و توزین و برای تعیین ضریب تبدیل کربن و درصد کربن آلی نمونه‌های گیاهی از روش احتراق در کوره الکتریکی استفاده گردید. مطالعات خاک در هر تیپ گیاهی، در عمق ریشه‌دوانی گیاه و همچنین در مناطق فاقد گیاه انجام شد. آنالیز دادهها بوسیله نرم‌افزار SPSS24 انجام شد. نتایج نشان داد که میانگین میزان ترسیب کربن خاک و گیاه در رویشگاه Z. fabago به‌ترتیب 61/14 و 18/0 و در تیپ گیاهیL. depressum 8/13 و 425/0 تن در هکتار بود و این تفاوت در سطح 5% معنیدار نبود. به‌طوری‌که میزان ترسیب کربن خاک در مناطق دارای پوششگیاهی گونههای مورد مطالعه افزایش معنیداری (902/6 - = t، 001/0 = p ) نسبت به مناطق بدون پوششگیاهی داشت. ضریب تبدیل کربن اندامهای هوایی و زیرزمینی گیاهان مورد مطالعه در سطح 5% معنیدار بوده و نسبت کربن ترسیب شده اندامهای هوایی به کربن ترسیب شده در ریشه برای قیچ و گرگ‌تیغ به‌ترتیب 43/2 و 08/2 بود. با توجه به توان ذخیره کربن گیاهان مورد مطالعه در خاک و اندامهای گیاه در رویشگاههای مورد مطالعه، میتوان بیان کرد که این گیاهان نقش مهمی را در ترسیب کربن با حداقل هزینه ممکن و تعدیل پیامدهای تغییر اقلیم در مناطق خشک دارند.
کلیدواژه‌ها
عنوان مقاله [English]
Carbon storage capacity of Lycium depressum Stocks and Zygophyllum fabago L. and soil (rooting depth) of their habitats in Meyghan playa, Arak
نویسندگان [English]
- Hamidreza Mirdavoudi 1
- Ehsan Zandi Esfahan 2
- Gholamreza Goudarzi 3
- Ali Famaheini 1
1 Assistant Professor., Department of Natural Resources, Markazi Agricultural and Natural Resources Research and Training Center, AREEO, Arak, Iran
2 Associate Professor, Rangeland Research Division, Research Institute of Forests and Rangelands (RIFR), AREEO, Tehran, Iran
3 Assistant Professor , Research Institute of Forests and Rangelands (RIFR), AREEO, Tehran, Iran
چکیده [English]
In this study, the initial assessment of carbon storage in plant communities of Lycium depressum Stocks and Zygophylum fabago L. was done in the Meyghan playa, Arak. Plant sampling was done by the random-systematic method. To determine the aboveground and underground biomass, a clipping method was used, and these organs were weighed separately. The organic carbon of plant samples was determined by the ash method. Soil studies were performed in each plant type, in the depth of plant rooting, as well as in areas without plants. The data were analyzed by SPSS24 software. The results showed that the soil and plant average carbon sequestration of Z. fabago habitat was 14.61 and 0.18, and in L. depressum type was 13.8 and 0.425 ton/ha. This difference was not significant at the 5% level. Soil carbon sequestration increased significantly in areas covered with studied species (t = - 6.902, p < /em> = 0.001), compared to the areas without any vegetation cover. The carbon conversion coefficient of above and underground organs of the studied plants was significant at the level of 5% and the carbon sequestration of aboveground parts of the plant to underground carbon sequestrated ratio in Z. fabago and L. depressum was 2.43 and 2.08, respectively. Considering the carbon storage capacity of plants studied (in the soil and plant), it can be concluded that these plants can play an important role in carbon sequestration at the least possible cost, and mitigation of climate change consequences in arid regions.
کلیدواژه‌ها [English]
- Climate change
- carbon storage
- Meyghan desert
- steppe rangelands
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