Mehri Dinarvand; Mohammad Fayaz; Hashem Keneshlo; Kourosh Behnamfar; Sajad Alimahmodi sarab; farhad khaksarian
Volume 29, Issue 1 , February 2022, , Pages 99-111
Abstract
Measuring the diversity and identifying plant vegetation traits and functional groups and classifying them, in addition to helping to accurately identify the vegetative capacity of the area, helps us to understand the vegetation response of the area to disturbances and presence. Potentially resistant ...
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Measuring the diversity and identifying plant vegetation traits and functional groups and classifying them, in addition to helping to accurately identify the vegetative capacity of the area, helps us to understand the vegetation response of the area to disturbances and presence. Potentially resistant species with similar or invasive traits help. The purpose of this study was to investigate and evaluate the vegetative status of the region, the trend of changes and evaluation of the second sequence of dust centers in Khuzestan after planting seedlings in different ways. Functional groups (PFTs) were used. To evaluate the changes in the vegetation of the area by field survey, 15 transects of 100 meters with distances of 50 meters were systematically randomly selected (the first transect was randomly selected and the rest with a defined distance of 50 meters). Due to the uniformity of plant species composition and the absence of environmental effects, a total of 180 fixed plots with dimensions of 1 square meter (location recording with GPS device) were installed. The results of a recent study in three areas of the dust center in the southeast of Ahvaz showed that in selected areas, various irrigation methods along with rainfall will cause significant changes in the percentage of cover (frequency) and the number of species from 2017 to 2020. Functional groups in the Tovayel region with surface irrigation (Faro) In 2020, nine groups were identified, in Bagan region with tanker irrigation and hole digging with seven excavators, and in Hanitieh region with tanker irrigation and hole digging seven functional groups. The results of T-test analysis also showed that there is a significant difference between the average of the two values of all indicators, including the diversity of Shannon and Simpson in March 2017 and March 2020 for all three regions so diversity indicators raised since number of species and cover increased.
Hasan Ghelichnia; Mohammad Fayaz; Hajar Nemati
Volume 28, Issue 1 , April 2021, , Pages 129-137
Abstract
In the program of increasing forage production, it is necessary to collect information about the establishment of forage plants. In this regard, the native population's seeds of sainfoin (Onobrychis altissima.) were collected to study different rangeland cultivation methods from the rangeland ...
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In the program of increasing forage production, it is necessary to collect information about the establishment of forage plants. In this regard, the native population's seeds of sainfoin (Onobrychis altissima.) were collected to study different rangeland cultivation methods from the rangeland areas of Baladeh Noor watershed in Mazandaran province in 2013 and at the research station of Poshtkooh with an average 320 mm of rainfall in a cold semi-arid climate. The cultivation were in two forms: seeding and seed scattering treatments, which were performed on spring and fall sowing in the form of split plots based on the randomized complete block design in three replications. The main treatment of the experiment was date of rangeland cultivation and the sub-plot was (seeding and seed scattering). Factors studied included plant height, canopy cover, seed production, plant production, and establishment percentage. The results show a significant difference between sowing and in spring and fall for the studied factors (plant height, canopy, production, seed and species production. Seeding method in fall had the highest values of the studied factors. Therefore, it is possible to improve the rangelands of similar climatic zones with sainfoin by sowing to increase forage production and direct grazing.