Volume 12, Issue 4 (1-2019)
مرتع 2019, 12(4): 411-425 |
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Sohrabi A, Ghorbani J, Heydari G, Rastegar S. Vegetation changes in rangeland restored by Prangos ferulacea pit-seeding in Dalvara and Kalvary rangelands in Chaharmahal and Bakhtiari province. مرتع 2019; 12 (4) :411-425
URL: http://rangelandsrm.ir/article-1-674-en.html
URL: http://rangelandsrm.ir/article-1-674-en.html
Abstract: (5287 Views)
Monitoring and assessment of restoration projects could determine the vegetation dynamic and the success rate of he the project. This study aimed to evaluate the effects of Prangos ferulacea pit-seeding on species composition and species richness and diversity in Dalvara and Kalvary in Chaharmahal and Bakhtiari province in two different years. Cover percentage of the species and also the density and biomass of P. ferulacea were measured in two treated sites (one in 2007 and another in 2011) and one control site (no treatment). Results showed that the cover and density of P. ferulacea was significantly greater in the sites treated in 2007 than the sites treated in 2011. Also, six years after the treated site of 2007, the biomass of P. ferulacea was twice than that of 2011. A total of 71 species were recorded of which 39 species were common among the two sites. The cover percentage of 14 species significantly reduced in the treated sites. Chardinia orientalis, Hordeum bulbosum, Taeniatherum crinitum, and Tragopogon longirostris showed a significant increase in 2007 while they reduced significantly four years later. The cover percentage of grasses were decreased by 80 percent due to P. ferulacea pit-seeding in 2011. Although similar annual species were found in the treated and the control site, their cover percentage was reduced significantly in the treated site due to a dense stand of P. ferulacea. The species richness and diversity were reduced under P. ferulacea pit-seeding. These indices also showed a significant negative correlation with cover percentage of P. ferulacea. The result showed that this project increased forage production but the effects of P. ferulacea on vegetation characteristics varied considerably based on the time laps of post-pit-seeding.
Type of Study: Research |
Subject:
Special
Received: 2019/01/18 | Accepted: 2019/01/18 | Published: 2019/01/18
Received: 2019/01/18 | Accepted: 2019/01/18 | Published: 2019/01/18
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