Volume 14, Issue 1 (4-2020)
مرتع 2020, 14(1): 95-105 |
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Motamedi J, Moameri M, Shydai Karkaj E. Response of Artemisia fragrans species to different grazing intensities in mountainous rangelands of Ghardaneh-e-Ghoshchi, Urmia. مرتع 2020; 14 (1) :95-105
URL: http://rangelandsrm.ir/article-1-869-en.html
URL: http://rangelandsrm.ir/article-1-869-en.html
Rangeland Research Division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran
Abstract: (3705 Views)
Grazing of livestock is the most effective factor in changing plant traits in rangelands, which in turn affects the ecosystem functionality. The characteristics change of the Artemisia fragrans species in mountainous Artemisia shrublands for their different grazing intensity effect (light, medium and heavy) were investigates in this study. For the aim of the study, three rangelands under different grazing intensities were selected. Vegetation measurements were done within 60 one square meter plots, located alongside of transects of 200 meters long. Then 40 plants of different sizes were selected and measured. To compare the mean of measured characteristics, one-way ANOVA and Duncan's multiple range tests were used. The results showed a significant difference between above ground biomass, average diameter of crown, height, crown surface and plant volume within the selected sites. Under-ground biomass, collar diameter and collar surface in different locations were not significantly different. The highest and lowest mean of air biomass per plants in two places with light and heavy grazing intensity were 17.9 and 12.4 grams respectively. The highest mean ground water biomass (19.9 grams per base) and the lowest value (16.5 grams per basin) belonged to light and heavy grazing sites, respectively. Trend of changes was negative from heavy to light grazing intensity. In general, the effect of grazing intensity on diameter and collar surfaces change was less than the height, average diameter of crown and crown cover. The result of this study could be used in risk management of rangelands.
Keywords: Ecosystem degradation, Structural traits, Biomass traits, Ecosystem function, Plant characteristics.
Type of Study: Research |
Subject:
Special
Received: 2020/04/30 | Accepted: 2020/04/30 | Published: 2020/04/30
Received: 2020/04/30 | Accepted: 2020/04/30 | Published: 2020/04/30
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