Ali Yazdanpanahi; Khaled Ahmadaali; Mohammad Jafari; Salman Zare
Volume 27, Issue 3 , October 2020, , Pages 421-432
Abstract
Nowadays, the addition of bio-charcoal to soils, as a way for carbon sequestration in the soil, reducing the concentration of carbon dioxide in the air, improving soil fertility, and reducing wind erosion, has attracted much attention. The aim of this study was to investigate ...
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Nowadays, the addition of bio-charcoal to soils, as a way for carbon sequestration in the soil, reducing the concentration of carbon dioxide in the air, improving soil fertility, and reducing wind erosion, has attracted much attention. The aim of this study was to investigate the effect of biochar application on yield and components of Haloxylon species in a randomized complete block design with soil additive factors including mycorrhizal fungi at two levels (consumption of 50 g of mycorrhiza and non-consumption of mycorrhiza), natural charcoal, and biochar produced from municipal waste compost at four levels (0, 50, 150 and 250 g / kg soil of dry soil), in the greenhouse of the Agriculture and Natural Resources, University of Tehran for nine months. The results showed that the addition of biochar had no significant effect on any of the morphological characteristics of Haloxylon persicum except root surface. The results also indicated that the average collar diameter, height, root area, fresh and dry weight of Haloxylon aerial parts in mycorrhiza-free treatments increased 31.9%, 35.7%, 15.5%, 56.9%, and 32.6%, respectively, and in mycorrhiza treatments, these characteristics increased by 4.7, 16.1, 11.1, 33.4, and 6.7%, respectively, as compared to the control treatment. Among the treatments studied, treatment nine (soil + 150 g natural charcoal + 250 g municipal waste compost) had the most positive effect on the morphological characteristics of Haloxylon.
hosein Mirzaee nodoushan; Hasan rouhipour; zeynab zare; fereshte asadi korom; salman zare
Volume 22, Issue 4 , March 2015, , Pages 768-777
Abstract
The research was conducted based on genetic variation of a black saxaul (Haloxylon aphyllum) plant population to find possible differences between the genotypes of the population, confronting various levels of water stress. A great number of progenies of four genotypes of the species were studied under ...
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The research was conducted based on genetic variation of a black saxaul (Haloxylon aphyllum) plant population to find possible differences between the genotypes of the population, confronting various levels of water stress. A great number of progenies of four genotypes of the species were studied under four levels of water stress, field capacity, 20, 50, and 80% of available water by the plant, using a factorial statistical model based on randomized complete block design. Branch number and length, main-stem and crown diameter, leaf chlorophyll content and leaf osmotic potential were recorded during and at the end of growing season. Studies on genotype and water stress factors revealed, although there were significant differences between the genotypes based on the studied characters, water stress levels were not significantly different based on the short duration of the research. Species such as Haloxylon, which is not fast growing species, would not respond to the stress levels during a short period of time. The genotypes were significantly different based on leaf chlorophyll content. Correlation coefficients between the morphologic characteristics were also noticeable. Negative significant correlation between leaf chlorophyll with branch number and trunk diameter implied that desert plant species such as the species under study would take advantage of light color of less chlorophyll content to cope with high temperature and sun light of their habitats.
Reza Yari; Ali Tavili; Salman Zare
Volume 18, Issue 4 , September 2012, , Pages 624-636
Abstract
Management activities like crescent intake and enclosure affect the soil surface indicators and rangeland functional attributes. To have a continuous and sustainable utilization of rangelands these changes must be recognized and managed. Indicators of soil surface characteristics and rangeland functional ...
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Management activities like crescent intake and enclosure affect the soil surface indicators and rangeland functional attributes. To have a continuous and sustainable utilization of rangelands these changes must be recognized and managed. Indicators of soil surface characteristics and rangeland functional attributes assist researchers in judging the effects of their applied management activities. The aim of this study is to investigate the effects of management activities like crescent intake and enclosure on soil surface indicators and rangeland functional attributes. For this purpose, three regions including freed enclosure, enclosure and crescent intake were selected and the effect of any aforementioned activities on soil surface characteristics and rangeland functional attributes were investigated by using Landscape Functional Analysis (LFA) method. In this method, for determination of three functional attributes (stability, infiltration and nutrient cycle) 11 soil surface indicators were applied as follows: ground cover, litter cover, litter (degree of decomposition), cryptogam cover, soil surface resistance to distribution, eroded materials, erosion features, soil microtopograghy, soil surface nature, slake test and soil texture. Data analysis was performed with SPSS software, Kruskal-Wallis nonparametric test and a Duncan multiple range test. According to the results, the indicators and functional characteristics of the rangeland have been changed due to the management activities. As significant differences were found among all 11 soil surface indicators except erosion feature and cryptogam cover in three studied regions (P<0.05). Also significant differences were found among three rangeland functional attributes in three study areas. Our results indicate that crescent intake and enclosure could improve rangeland functional attributes.