Arzani, Hossein

Azarnivand, Hossein

Sadeghimanesh, M. R.

Shahriary, E.

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings XXI International Grassland Congress / VIII International Rangeland Congress Study of Phenological Stages Effect on Nutritive Values of Twelve Species in Hamadan Rangelands, Iran M. R. Sadeghimanesh Agriculture and Natural Resources Research Center, Iran Hossein Arzani University of Tehran, Iran Hossein Azarnivand University of Tehran, Iran E. Shahriary University of Tehran, 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/21/10-1/27 The XXI International Grassland Congress / VIII 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 ]215　 瞯Grasslands/Rangelands Production Systems——— Integration of Crops , Forage and Forest SystemsStudy of phenological stages effect on nutritive values of twelve species in Hamadan rangelands , IranM .R . Sadeghimanesh1 , H . A rz ani2 , H . A z arnivand3 , and E . Shahriary 41 members o f scienti f ic board A griculture and Natural Resources Research Center o f H amadan‐I ran‐Post Box : 65199‐91169Tel . : ＋ 980811‐4373587‐97 Fax : ＋ 980811‐4373606 . E‐mail : msadeghimanesh＠ yahoo .com2 Pro f essor Faculty o f Natural Resources University o f Tehran , E‐mail : harz ani＠ ut .ac .ir K araj‐I ran‐Post Box : 31585‐4314 Tel . : 0261‐2223044 Fax : 0261‐2249313 .3 A ssistant Pro f essor Faculty o f Natural Resources University o f Tehran .4 PhD student o f range Management in Tehran University .Key words : forage quality ,phenological stage ,crude protein ,acid detergent fiber ,dry matter digestibilityIntroduction Determination of grazing capacity depends on various factors such as forage quality and species nutrient values , andto achieve optimum animal production more information about nutrient value isimportant and needed( Arzani , H . １９９４) .Materials and methods In this trial , nutrient values of twelve species were evaluated , whengrazed by Mehraban sheep in twophenological stages ( vegetative and mature) in two separate sites ( Agh Dagh & Galebor) at Hamadan province . Forage qualityindices as Crude protein ( CP) , acid detergent fiber ( minus Hemicelluloses) ( ADF) were accessed , and based on dry matter ;dry matter digestibility (DMD) and metabolisable energy ( ME) were also measured .Results According to these results , significant differences were observed among the species and phenological stages for allmeasured and calculated forage quality factors ( p ＜ ０ .０５) ( Figure １ , ２) . Generally , Information about forage quality factors isessential for animal nutrition management in rangeland and it should be considered in range and animal management design( Cherney , J .H . et al １９９２ ) .Figure 1 Crude p rotein percent o f twelve species in two phonological stages .Figure 2 A cid detergent f iber percent o f twelve species in two phonological stages .Conclusions Protein is important in the animal摧s body . Carbohydrate , which are composed of carbon , hydrogen and oxygen , arethe basic source of energy for range animals . Actively growing plant parts have much higher protein levels than do those thatare dormant . In this study medicago sativa contained highest protein and lowest fiber . Studies by Smite at al (１９７２) show thatthe cell wall of legumes digests more quickly than do those of grasses . According to the results , significant differences wereobserved among the species and phenological stages . Forage nutritive quality on most range varies tremendously betweenseasons because nutrients translocate from the leaves and stems to crowns and roots with the onset of dormancy . Digestibilityvaries greatly among species , although leaves and fruits are consistently higher in digestibility than are stems and twigs .ReferencesArzani , H . , １９９４ . Some aspects of estimating short‐term and long‐term rangeland carrying capacity in the Western Division ofNew South Wales . PhD . thesis , University o f New South W ales , A ustralia .３８０ p .CherneyJ .H .and M .H . Hall . , １９９２ . Determinants o f Forage Quality .１５０ p .

Study of Phenological Stages Effect on Nutritive Values of Twelve Species in Hamadan Rangelands, Iran

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Study of Phenological Stages Effect on Nutritive Values of Twelve Species in Hamadan Rangelands, Iran

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