Hosainzadeh, Golriz

Jalilvand, Hamid

Tamartash, Reza

Tatian, Mohammadreza

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress Effects of Grazing Intensity on Vegetation Cover and Soil Properties in Central Alborz Hamid Jalilvand Sari Agricultural Sciences and Natural Resources University, Iran Reza Tamartash Sari Agricultural Sciences and Natural Resources University, Iran Mohammadreza Tatian Azad University, Iran Golriz Hosainzadeh Azad University, Iran Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/9-2/44 The 21st International Grassland Congress / 8th International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅱ 　 瞯 ]111　 瞯Grasslands/Rangelands Production Systems——— Livestock Production SystemsEffects of grazing intensity on vegetation cover and soil properties in central AlborzHamid Jalilv and 倡 1 ,Rez a Tamartash1 ,Mohammadrez a Tatian2 ,Golriz Hosainz adeh31 Faculty Members o f Sari A gricultural Sciences and Natural Resources University ,2 Post G raduate S tudent ( Ph .D .) A z ad University ,3 G raduated Student o f Range Management (M .Sc .)倡 E‐mail :hj ＿ 458 ＿ hj＠ yahoo .com ; h .j alilv and＠ umz .ac .ir ,Sari ,Maz andaran Prov ince ,P .O .Box :＃ 737 ,IR‐I ranKey points : Investigation of the effects of grazing on the vegetation cover and some chemical soil properties in rural ranges ofcentral Alborz ( Iran ) at three conditions of reference ,key and critical areas were studied .Results of this study show thatpalatability plants in the reference region ,average palatability plants in the key region ,and low delicious plants or non deliciousplants in the critical region have the most vegetation cover percentage .This study revealed that soil of the reference region hadthe highest density ,vegetation cover ,organic carbon ,total nitrogen ,phosphorus ,potassium .Key words : grazing intensity ,reference ,key ,critical ,vegetation cover ,soil properties ,Alborz ,IranIntroduction For rangeland preservation ,reclamation ,renovation ,development ,and exploitation ,soil and vegetation cover are themain factors of rangeland ecosystems and they have a reciprocal relationship with the number of livestock .The change processof soil and vegetation cover in different grazing conditions in the steppe rangelands at Semnan ( Mousavi ,２００１ ) and SouthAustralia ( Michael et al . ,２００６ ; Gilfedder et al . ,２００５) .The aim of this research was to identify the changes in vegetation coverand soil properties at different grazing conditions of rural rangelands in central Alborz ,in Iran to facilitate the managingactivities and permanent exploitation .Materials & Methods The study area is a part of rural rangelands of Central Alborz and it is located at western part of Savadkuhin the province of Mazandaran .According to Ambarges classification the area is located at the mountainous ( heights) of the coldcategory .The samples were measured the amounts of soil organic matters ,total nitrogen ,absorbable phosphorus and potassiumand acidity .We used SAS statistical program software to analyze the collected data .Vegetation cover and soil data was analyzedthrough factorial experimentResults & Discussion According to the results of measuring the vegetation cover percentage the grazing intensity increases as weprecede from the reference area towards the critical area .Statistically significant differences at the １％ level were found betweenthe plant coverage percentages of class II in the key and critical areas .As the grazing intensity increases ,plant litter percentagewould be decreased in the reference and in the key and critical areas .Acidity level in the critical area is higher than that of withinthe reference area .The pH of reference area was differed with key and critical area at the １％ level .Based on the results ofmeasuring the soil total nitrogen in three treatment areas ,differences between the average soil nitrogen of the reference andcritical areas were found at the １％ level .The lowest nitrogen was related to the first depth of soil .There was a difference at the５％ level between soil phosphorus in first depth .The results of potassium in grazing treatments showed in reference area withkey and critical area were differed at the １％ level .Organic matter could be from excessive yield of plants aero‐components( Mohammadi ,２００１) .The high amounts of phosphorus existed in the soil surface layer of protected area and plants absorbphosphorus from deep layers of soil .The highest amount of soil potassium is observed in the reference area and its lowestamount is related to the key area .Potassium discharge in the key area is more than two other areas ,because less animal waste isadded to the soil in the key area under a light grazing treatment ,and on the other side yielding some plant components resultedin higher potassium consumption ( Sanadgol ,２００２ ; Mohammadi ,２００１)ReferencesGilfedder ,L . ,Kirkpatrick ,J .B . ,２００５ .Climate ,grazing and disturbance ,and the population dynamic of leucochrysum albicans atRoss ,Tasmania .A ustralian Journal o f Botany ４２ (４) : ４１７‐４３０ .Michael ,H . ,Parsons , J . ,Koch ,B . ,Lamont ,S . , Fairbanks ,M . ,２００６ . Planting density effects and selective herbivore bykangaroos on species used in restoring forest communities .Forest ecology and Management ２２９ ,３９‐４９ .Mohammadi ,J . ,Reissi ,F . ,Asadi‐Broujeni ,A . ,２００１ .Geostatistical analysis of long term and intensive grazing effects onchanging of soil constructure properties .Second Proceeding o f National Seminar o f Range and Range Management in IR‐I ran ,p p : １５７‐１６４ ( In Persian) .Mousavi ,M . ,２００１ .The effect of enclosure on trend changing of vegetation and soil in semi‐step rangeland of Semnan .SecondProceeding o f National Seminar o f Range and Range Management in IR‐I ran , pp : ２５４‐２６２ ( In Persian) .Sanadgul ,A . ,Moghadam ,M . ,Jafari ,M . ,２００２ .Effects of short‐term grazing on soil chemical and physical properties in Bromustomentellus pasture .Journal o f I ran Natural Resource ５５ (４) : ５８１‐５９６ ( In Persian) .

Effects of Grazing Intensity on Vegetation Cover and Soil Properties in Central Alborz

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Effects of Grazing Intensity on Vegetation Cover and Soil Properties in Central Alborz

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