Khodadoust, Mahdieh (2021) Investigation the Effect of Grazing on Organic Soil Carbon and Nitrogen Storage (Case Study: Kouteh, Khash, Iran). Masters thesis, University of Zabol.
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Investigation the Effect of Grazing on Organic Soil Carbon and Nitrogen Storag (Case Study Kouteh, Khash, Iran).pdf Download (95kB) | Preview |
Abstract
One of the most important components of rangeland ecosystems is soil that their degradation will reduce rangeland production capacity. About half of the world's lands are rangelands and have more than one-third of the biosphere carbon reserves. Therefore, these lands have a high potential for carbon sequestration. The aim of this study was to investigate the carbon and nitrogen storage capacity of soil in enclosure and grazed sites in Kouteh rangelands of Khash city, Sistan and Baluchestan province. For this purpose, 60 plots of 1 by 1 meter were considered along 6 transects of 100 meters in a random-systematic method in each of the enclosure and grazed sites. In each plot, the list of available species, percentage of vegetation, litter, stone and gravel, and bare soil were recorded. A soil profile was taken from a depth of 0-15 and 15-30 cm for each area (enclosed and grazed) from the beginning, middle and end of each transect. Then a composite sample was prepared from a combination of three samples of each depth. Twenty-four soil samples were transferred to the laboratory to measure physical characterizes (sand, clay and silt percentage, and bulk density), chemical characteristics (Caco3, organic matter, organic carbon, pH, Ec, N, P, K, Na, Ca, Mg), and biological characteristics (organic carbon and nitrogen reserves). SPSS software and paired and independent t-test were used to analyze the data. The results of soil surface factors showed that there is a significant difference between the two sites in terms of the number of species, percentage of vegetation, and litter. There is also a significant difference between the measured physical and chemical properties between the enclosure and grazed sites. The results of statistical analysis showed that there is a significant difference in organic carbon and nitrogen storage in the two enclosure and grazed sites. The highest reserves of carbon (16.23 tons/hectare) and nitrogen (1.76 tons/hectare) were obtained in the enclosure site and a depth of 15-30 cm. Also, there was a significant difference between the amounts of soil organic nitrogen storage in the enclosure site between the two depths. In general, according to the results, soil with the depth of 15-30 cm in the enclosure site had the greatest carbon and nitrogen storage.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Rangeland, Carbon Storage, Soil, Enclosure, Kouteh |
| Subjects: | S Agriculture > S Agriculture (General) |
| Depositing User: | Mrs najmeh khajeh |
| Date Deposited: | 13 Sep 2022 07:29 |
| Last Modified: | 13 Sep 2022 07:29 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/2947 |
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