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Studying the Effect of Exclosure and Pit-Seeding on Composition, Diversity and Nutrient of Rangeland Plants (Case study: Darani Rangelands, Tuyserkan City, Hamedan Province)
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Davoud Akhzari *   , Fatemeh Shokrkhoda2 |
Faculty Member of Malayer University , d_akhzari@yahoo.com
2- Post graduate student of Rangeland Management |
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Abstract: (12 Views) |
Since the Shannon-Wiener and Simpson diversity indices are the most common diversity indices, therefore, examining species diversity and richness is essential. It is vital in examining species diversity.The purpose of this study is to investigate the effect of mulching and exclosure on the composition, diversity and nutrients of vegetation of mountain pastures in Darani Olya region in Tuyserkan city. Sampling by systematic-random sampling method, in a 5-hectare area that has been sown with seed of Ferula gummosa, Onobrychis sativa and Agropyron elongatum since 2014 and this region has been exclosured till now. 10 transects of 100 meters with a distance of 50 meters from each other were used and during each transect, 10 plots of one square meter were determined and in each plot, the underground and aerial parts of the plant were sampled in two areas of grazing and exclosure. Then the amount of total protein, phenol and nutrients of plant tissue were measured. Simpson uniformity index, Margalef and Menhinick richness indices and Shannon-Wiener and Simpson diversity indices were also performed using principal component analysis (PCA) method and PC-ORD software. All samples were evaluated by non-paired t test at 5% level. The results showed a significant difference between the amount of phosphorus, total protein and phenol of the plant in the exclosure zone (4.2, 6.4 and 0.69, respectively) and heaping (8.4, 5.3 and 0.65, respectively). At the level of 5% compared to the grazed area, but the amount of nutrients in plant tissue in the grazing area was significantly higher than the grazing and mulching area at 5%. Shannon-Wiener and Simpson indices showed that diversity in the restricted area (1.58 and 0.93, respectively) was significantly higher than the grazing area (1.21 and 0.82, respectively). Margalef and Menhinick richness indices in the exclosure and mounding area (2.43 and 1.85, respectively) were significantly higher than the grazing area (1.63 and 1.65, respectively), but the Simpson index in the two regions was not significantly different at the 5% level. Due to the large presence of the main species that are generally palatable, the vegetation of exclosure region is in a more ecologically stable state compared to the area under grazing, and this is the reason for the positive effect of exclosure in creating an environmental balance in relation to the presence of these species.
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Article number: 11 |
| Keywords: Diversity indices, plant nutrients, plant protein |
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Full-Text [PDF 1737 kb]
(5 Downloads)
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Type of Study: Applicable |
Subject:
Special
Received: 2024/11/3 | Accepted: 2025/03/29 | Published: 2025/09/16
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