javad Motamedi(torkan); Delshad Bahramini; morteza mofidi chelan; Esmaeil Sheidai Karkaj
Abstract
Measuring this year's growth is one of the basic requirements for calculating the annual storage potential of carbon. On the other hand, shrub plants, and especially Astragalus, are considered to be the most prominent and dominant species of semi-steppe rangelands. Therefore, the present study was conducted ...
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Measuring this year's growth is one of the basic requirements for calculating the annual storage potential of carbon. On the other hand, shrub plants, and especially Astragalus, are considered to be the most prominent and dominant species of semi-steppe rangelands. Therefore, the present study was conducted in June 2016, with the aim of estimating the growth of storage carbon in the Astragalus microcephalus plant and its relationship with the distance from the crisis center (overnight livestock area) in the Nazluchai mountain rangelands. For this purpose, Chir rangelands in the north of Noushin Shahr with an area of 1332 hectares, which in terms of vegetation, soil and topography, represents a level of various species in the region, were selected and six ecological sites were surveyed. Given that almost all of A.microcephalus species grow this year, it will become a woody organ; within each site, this year's growth of 30 A.microcephalus plant bases is intended to determine the organic carbon conversion factor and estimate the amount of carbon stored, it was cut off. After calculating the organic carbon conversion factor for biomass of plant bases on each site, multiplying it by the dry weight of this year's growth, the amount of organic carbon stored in the aerial parts was determined. By calculating the average carbon content in the bases and A.microcephalus species density, the amount of stored carbon per unit area of the habitat was calculated.
Javad Motamedi; Shookofeh Ebrahimi; Esmaeil Sheidai Karkaj
Abstract
Estimation of carbon storage is one of the essential requirements for evaluating rangeland ecosystem services and economic evaluation of carbon storage in rangeland plans. Plant performance in carbon storage is a function of plant characteristics, environmental and management factors. Therefore, the ...
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Estimation of carbon storage is one of the essential requirements for evaluating rangeland ecosystem services and economic evaluation of carbon storage in rangeland plans. Plant performance in carbon storage is a function of plant characteristics, environmental and management factors. Therefore, the relationship of annual carbon storage of Astragalus brachyanus with plant traits, habitat characteristics and range management in the mountainous rangelands of Rajan was investigated. The five sites in which the species were distributed and differed in physical characteristics were selected and coded based on the type of management (exclosure or exclosure; intensity of grazing, medium and low grazing) and geographical direction. At each site, vegetation was measured within 30 two-by-two-square-meter plots, located 10 m apart along six 50 m transects. At each location, 15 A. brachyanus plant stands with different dimensions were selected and measured while measuring their appearance characteristics, and their current year growth was cut to estimate carbon storage. Samples were transferred to the laboratory to estimate the carbon conversion factor. Two composite soil samples were also taken from each site. Topographic factors (slope, geographical direction and altitude) and management (grazing in study units) were also recorded at each location. In order to investigate the relationship between annual carbon biomass storage and environmental and management , partial least squares regression was used. Based on the results, carbon storage of A. brachyanus was significantly different. Annual carbon biomass carbon storage, with crown diameter, number of base and plant height, was directly correlated with type of management (grazing intensity).
