yahya parvizi; Mohammad Qeytouri; Reza Bayat; Alireza Shadmani; Afshin Partovi
Volume 25, Issue 2 , August 2018, , Pages 310-323
Abstract
This research was conducted to evaluate the potential of different rangeland planting practices for carbon sequestration in various climatic and geographical regions of the country. For this purpose, the key sites of rangeland planting practices were selected in the Lorestan, ...
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This research was conducted to evaluate the potential of different rangeland planting practices for carbon sequestration in various climatic and geographical regions of the country. For this purpose, the key sites of rangeland planting practices were selected in the Lorestan, Fars, Kermanshah, Khorasan Razavi, Mazandaran, Kordestan, Kerman, Markazi, and Esfahan. Then, the characteristics of the sites selected were recorded and sampling of soil, aerial biomass, and root was performed in a random-systematic manner. The results showed that rangeland planting practices in the semi-arid forests of central Zagros slopes had the highest carbon sequestration capacity. The seeding and pit-seeding of perennial legumes and grasses such as festuca, alfalfa, sainfoin and onobrichis could sequester up to 17.4 to 80 tons of carbon per hectare. The contribution of soil in carbon sequestration was at least 93 percent of the total carbon stock of the study area. Rangeland planting practices together with exclosure caused to increased carbon sequestration up to two times. In these areas, pit-seeding was more successful than the other practices. In the Hyrcanian regions, the seeding of perennial legumes and grasses could sequester 18 tons carbon, ranked second after range planting practices in the central Zagros slopes. Rangeland planting practices in arid and semi-arid areas of the central and the eastern part of the country showed little effect on increasing the carbon sequestration capacity compared to other areas mentioned above. The highest carbon sequestration was recorded to be 5.63 and 6.51 tons carbon per hectare for the exclosure rangelands in Kardeh and Shamsabad watershed, respectively. Land use change from dry farming to rangeland in Kardeh watershed resulted in carbon sequestration of 4.7 tons per hectare.
Somayeh Dehdari; Masoomeh Movaghari Rodposhti; Zohreh Khorsandi Koohanestani; Ali Ehsani
Volume 25, Issue 1 , April 2018, , Pages 227-234
Abstract
The reduced biomass in forests and rangelands ecosystems for any reason can affect the process of carbon sequestration and as a result of global warming. This study was conducted to assess carbon storage under different grazing intensities in rangeland of Chah Mary dominated with Artemisia ...
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The reduced biomass in forests and rangelands ecosystems for any reason can affect the process of carbon sequestration and as a result of global warming. This study was conducted to assess carbon storage under different grazing intensities in rangeland of Chah Mary dominated with Artemisia siberi in Khuzestan province. Three sites under heavy, moderate and low grazing intensities were selected based on similar topographic features (slope, aspect and elevation), rainfall, soil and climate. Plant sampling was done in key areas by random-systematic method along three transects of 100m and 60 plots of 1m2. Then, aerial and underground biomass parameters were evaluated in each plot and carbon was determined by ash method. The data were analyzed by SPSS v.16 software. According to the results, carbon sequestration decreased from 5704/3 in the low-grazing region to 3470/1 in the high-grazing region. Also, under low-grazing intensity, the carbon stored in aerial biomass and underground biomass was 4360/9 and 2180/5, respectively.