Maryam Abbasi Kesbi; Bakhtiar Fattahi; Reza Erfanzadeh; Anna Sher
Abstract
The paper is conducted to investigate the coverage and the seed bank in the areas the Riparian of the Gyan river in Nahavand city in Hamadan province. Five sampling sites along the river were determined. At each site, a transect perpendicular to the river flow and along each transect at least 6 plots ...
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The paper is conducted to investigate the coverage and the seed bank in the areas the Riparian of the Gyan river in Nahavand city in Hamadan province. Five sampling sites along the river were determined. At each site, a transect perpendicular to the river flow and along each transect at least 6 plots of 1 square meter (three on each side of the river) are established. The Soil sampling was done from two depths of 0-5 and 5-10 cm at 10 points randomly from each plot. The soil samples are cultivated in the greenhouse the seeds germinate in them and are identified. Then diversity indices, calculated for cover and soil seed bank in each plot. Each of the above factors are compared in the intervals of 0-10, 10-20 and 20-30 meters from the center of the river by one-way ANOVA. Also, Sorenson's index is used to check the similarity of the species composition of cover and the soil seed bank of the Riparian area. The results show that the highest diversity related to the soil seed bank is at a depth of 0-5 cm at a distance of 10-20 meters, which is due to the dominant of Cyperus difformis annual plants at this depth. The percentage of similarity of surface-ground cover in the areas of Riparian and seed bank of the first depth and the second depth (20-7) percent, which was very low due to the washing of seeds by the river currents and the movement of seeds by grazing. This study showed that recovery of the vegetation of the river riparian is possible via the soil seed bank.
Bakhtiar Fattahi; Mohammad Jafari; Soheila Aghabeigi Amin; mahdieh salehi; ayoub karimi; Azad Karami
Abstract
Abstract This study aimed to investigate the effect of different intensities of grazing on soil chemical properties on Gonbad paired basins-Hamadan. The objective of this research was to characterize the impact of sheep grazing intensity on soil chemical behavior on mountainous in Hamadan rangelands ...
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Abstract This study aimed to investigate the effect of different intensities of grazing on soil chemical properties on Gonbad paired basins-Hamadan. The objective of this research was to characterize the impact of sheep grazing intensity on soil chemical behavior on mountainous in Hamadan rangelands (Gonbad paired basins). Grazing intensity was classified as light, moderate and heavy, then the soil samples from the three depths of 0-10, 10-20 and 20-30 cm were collected. The soil data was analyzed via SPSS (ANOVA). Results showed that the soil OC, total N content and organic matter decreased significantly with grazing intensity and they were greatest at the surface and decreased with depth. The amount of Calcium and Magnesium won't be affected by grazing intensity. The decreases in soil OC suggest Carbon storage in the soil of grassland declined as grazing intensity increased. Combined with the decreases in soil TN content, this also means heavy grazing could lead to decreases in soil quality and fertility. Uneven grazing intensity is an inherent feature of a season long-grazing system and there are risks to avoid quality and environmental health.
