Effect of imformanced grazing on Vegetation and soil in Delarestagh Summer ranglands of Amol

Ebrahimzade Omran, S. (2014) Effect of imformanced grazing on Vegetation and soil in Delarestagh Summer ranglands of Amol. Masters thesis, University of Zabol.

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Mountain ranges of Delarestagh with plenty ecological resource have important rule to soil and water conservation; so the effect of livestock grazing vegetation and soil on this rangelands was investigated by three grazing treatments including light grazing (reference area), moderate grazing (key area) and heavy grazing (critical area). We sampled soil to 40 cm depth in each area and measured the factors like soil texture, structure, PH, total N, and soil organic C of three areas, 6 replications and infiltration were done by double ring. The factors of vegetation cover less and bare soil, estimated by 5 transects (long 50 m) in each area. Production (biomass yield) measured by double sampling method with 10 replications, density by point centered quarter method and diversity by Shannon wiener function (1949). Root vertical and horizontal extension of three species estimated with 5 replications in each area. ANOVA and homogeneity Duncan test were used for analyzing the data. The results indicated that, grazing did not have any significant effect on soil texture. Grazing intensity significantly interacted with area in affecting infiltration rate. The reduction of infiltration was observed with the heavy grazing compared to light and moderate grazing. The higher N and soil organic C was measured in heavy grazing area and higher pH was observed in moderate grazing and the lower amount was observed in heavy grazing. Root horizontal extension of dominant perennial grasses significantly reduced with increasing the grazing pressure T and vertical extension of root in critical area was more than reference area. The results of data analysis showed that the Grazing intensity did not have any significant effect on vegetation cover percentage. Litter and bare soil percentage reduced and increased with increasing grazing pressure respectively. We concluded that grazing management is necessary for conservation of soil and vegetation and it needs strategies for implementation grazing systems in rangelands.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Grazing, Livestock, Vegetation, Soil, mountain ranges, Delarestagh
Subjects: S Agriculture > S Agriculture (General)
Depositing User: admin admin1 admin2
Date Deposited: 14 May 2016 09:03
Last Modified: 14 May 2016 09:03
URI: http://eprints.uoz.ac.ir/id/eprint/584

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