Volume 16, Issue 2 (8-2022)                   مرتع 2022, 16(2): 256-270 | Back to browse issues page

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Ghorbani A, Andalibi L, Dadjoo F, MohammadZadeh Ni K, Mirzaie Aghche Gheshlagh F, Hashemi Majd K, et al . Nutritional value determination of two species Tanacetum chiliophyllum and Potentilla reptans in Shoghal-dareh Rangelands of Namin, Ardabil Province. مرتع 2022; 16 (2) :256-270
URL: http://rangelandsrm.ir/article-1-1105-en.html
Department of Range and Watershed Management, University of Mohaghegh Ardabili, Ardabil
Abstract:   (2062 Views)
Background and objectives: The role of rangelands in the production of livestock products is important in terms of animal feed production. The value is two-thirds of the total cost of production in different livestock farming units. Rangeland managers consider livestock performance to be the ultimate result of the quality of the rangelands forage. Forage quality is defined as the ability to produce optimal level of livestock yields (meat, milk and wool production). The nutritional value of forage indicates the amount of energy and nutrients available to the animal. The purpose of this study was to determine the minerals and nutritional value of Tanacetum chiliophyllum Sch.Bip. and Potentilla reptans L. (dominant species of region) during three phenological stages (vegetative, flowering, seeding) and in two geographical directions of rangelands in Shoghal Darreh rangelands, Namin County of Ardabil province.

Methodology: Two sites in the Shoghal-dareh area of Namin county in Ardebil province were selected for sampling. The area is in the vicinity of Caspian Sea. Humadity of the area links to the Sea, the West Alborz Mountain. Samples were randomly collected from 50 species. Dried specimens were taken into laboratory for the following, detemination of macro minerals (nitrate, calcium, phosphorus, nitrogen, sodium and potassium), micro minerals (iron, copper, zinc and manganese) and chemical properties (ADF, NDF, dry matter, crude fat, crude ash, and crude protein) using standard laboratory methods at different vegetative stages.
Results: The results were compared using compare mean for statistical analysis and showed that the differences between T. chiliophyllum and P. reptans in potassium, calcium, nitrate, phosphorus, zinc, copper and manganese were significant (P<0.01) and in iron and ash they were significant (P<0.05). Phenological stages made a significant difference (P<0.01) in iron, zinc, manganese and fat. Aspect made a significant difference (P<0.05) in crude protein, dry matter, NDF, iron, calcium and nitrate. According to the results, the amount of macro elements, micro and crude protein levels in different stages of growth were lower than critical and the amount of dry matter was higher than the critical. These results indicate the importance of the role of intrinsic characteristics, growth stage and environmental conditions in determining forage quality characteristics.
Conclusion: The results of this study confirm that plant performance in ecosystems is affected by various factors such as species, aspect and growth stage. Each of these factors can have a significant impact on the quantity and quality of grassland plants. Therefore, studies on the impact of different environmental factors and growth stages needed to enable actuality-based management planning to exploit rangelands properly. The results of comparison of forage quality of two species showed that P. reptans had higher forage value than T. chiliophyllum. It is suggested that grazing systems should operate in such away that while maintaining the rangeland status, the livestock function could be kept at a favorable level.
 
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Type of Study: Research | Subject: Special
Received: 2021/12/19 | Accepted: 2021/12/1 | Published: 2022/08/1

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