نوع مقاله : علمی-ترویجی
چکیده
کلیدواژهها
عنوان مقاله [English]
Given the sensitivity limits to plant growth in pasture lands with saline and alkaline soil , it is necessary to protect the plants which cause soil conservation against erosion, especially wind erosion, in these lands . In livestock activities that were observed in these lands, the effects of cattle grazing are evident with the factor of distance from the fold. In this study the role of livestock grazing on salt tolerant species was studied in grazing areas around 3 folds and effects of livestock grazing on vegetation cover in 3 area of different grazing intensity zone were studied based on distance from fold. Results showed although the livestock in that area graze for a long time out of growth season, due to excessive grazing, turmoil can be seen in the vegetation cover. The density of vegetation spots reduced from 24 vegetation spots in the area without grazing to 16/15 spots vegetation within the grazing area and the size of vegetation spots reduced from 1680cm in the area without grazing to 980 cm in the area with excessive grazing area along the transects. Also plant height of the vegetation spots declined from 14/23 cm in range without grazing to 14/12 cm in the area with excessive grazing.
کلیدواژهها [English]
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