Abdolhamid Hajebi; Mohammad Fayaz; Mohammad Amin Soltanipoor; Saeedeh Nateghi
Volume 30, Issue 1 , April 2023, , Pages 94-110
Hossein Bagheri; Mahshid souri; Seyed Mehdi Adnani; Hossein Tavakoli Neko; Saeedeh Nateghi
Volume 29, Issue 4 , January 2023, , Pages 596-607
Abstract
Early establishment of rangeland plant species, especially in arid and semi-arid regions, is a considerable issue to increase their yield. In order to investigate the effects of seed priming on changes in yield of the Astragalus brachyodontus pasture species, the present study was carried out in the ...
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Early establishment of rangeland plant species, especially in arid and semi-arid regions, is a considerable issue to increase their yield. In order to investigate the effects of seed priming on changes in yield of the Astragalus brachyodontus pasture species, the present study was carried out in the greenhouse with factorial design. Three treatments of hydro-priming (distilled water), osmopriming (Polyethylene Glycol with two levels of -0.4 and -0.8 MPa) and hormone priming (gibberellic acid) as the first factor, and three levels of deficit irrigation stress (100% field capacity, 75% field capacity and 50% field capacity) were considered as the second factor and 3 populations (Zanjan, Qom and Khalkhal) as the Third factor with 3 replications. The results showed that seed priming, deficit irrigation stress, populations and their interactions had a significant effect at the 1% probability level on all investigated traits. The soil water reduction caused a significant decrease in seedling germination percentage, stem length and weight, but the root length increased and the root weight first increased and then decreased intensively. The maximum yield of height (11.0267 cm), root length (30.6467 cm), stem weight (1.1700 g) and root weight (1.3664 g) was related to Zanjan population in normal irrigation. The treatment of -0.4 MPa osmopriming had the highest values in root length (33.1556 cm), stem weight (1.2144 g) and root weight (1.4800 g). Generally, according to the present research, -0.4 MPa osmo-priming and hormone priming with gibberellic acid were introduced as treatments to improve the Astragalus brachyodontus species performance in the greenhouse under the severe deficit irrigation stress condition. This results can be considered to improving the establishment and performance of this native valuable forage, in breeding programs and rangeland development, to improve its initial establishment in deficit irrigation conditions.
Mohammadamin Soltanipour; Saeedeh Nateghi; Mohammad Fayaz
Volume 25, Issue 3 , November 2018, , Pages 612-626
Abstract
This research was aimed to determine the grazing behavior of Tali goat, as the dominant livestock, in the Zaminsang rangelands of Hormozgan province for four years starting from 2006. The indices examined in this study included the time of livestock entry to and exit from rangelands, the daily distance ...
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This research was aimed to determine the grazing behavior of Tali goat, as the dominant livestock, in the Zaminsang rangelands of Hormozgan province for four years starting from 2006. The indices examined in this study included the time of livestock entry to and exit from rangelands, the daily distance moved by the livestock, the livestock path, maximum and average livestock speed, and the time spent for livestock rest, movement and grazing. To determine the mentioned indices, the GARMIN GPS was used and closed with a special belt behind a three-year-old goat. The GPS was activated when the livestock exited the barn. Then, at the end of the day, its data were extracted in the Ilwis software. The path of livestock movement was determined by the shepherds. According to the results, significant differences were found for the average speed of livestock in the fourth year, and the movement time and rest time in the fourth and fifth months, while no significant difference was found for other behavioral characteristics of livestock grazing. Moreover, during the study period, 31 to 39 percent of the time the livestock moved in the rangeland was dedicated to grazing.
Mohammadreza Shooshtari; Hooshmand Safari; Mohammad Fayyaz; Morteza Akbarzadeh; Saeedeh Nateghi
Volume 20, Issue 3 , November 2013, , Pages 570-583
Saeedeh Nateghi; Gholam reza Zehtabian; Hasan Ahmadi
Volume 19, Issue 4 , March 2013, , Pages 590-600
Abstract
Segzi plain is one of the most critical areas of the province in terms of the extent and severity of desertification process. This area has a special strategic position due to the industrial centers, Shahid Babaee airport, Shahid Beheshti International Airport, railroads, transit road of Bandar Abbas- ...
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Segzi plain is one of the most critical areas of the province in terms of the extent and severity of desertification process. This area has a special strategic position due to the industrial centers, Shahid Babaee airport, Shahid Beheshti International Airport, railroads, transit road of Bandar Abbas- Esfahan, agricultural centers and vicinity to historical city of Esfahan. Consequently, investigation on the main cause of desertification phenomenon is the main objective of this study. Therefore, the IMDPA model was used to study desertification intensity in Segzi plain. In this research, two criteria including geology – geomorphology and soil, consisting of seven indicators (sensitivity of the formation, land use, and slope based upon geology–geomorphology criterion, and soil texture, soil depth, percentage of stone and gravel, and EC based upon soil criterion) were studied. Desertification intensity map was generated by using geometric mean of criteria. With regard to the geometric mean of criteria, soil criterion, with a numerical value of 3.4, and geology – geomorphology criterion, with a numerical value of 3 were classified in severe desertification class. Finally, the severity of desertification (DS) was calculated to be 3.26 indicating that the region was in severe desertification class. Results showed that EC, with an average value of 3.75, was classified as very intense indicator and had the most impact on desertification of the region.