Ali Reza Mahmoodi; Ali Tavili; Hamid Reza Boostani; Mohammad Jafari; Salman Zare
Abstract
An appropriate amount of soil was picked up from the surface horizon (0-30 cm) from the rangeland of Darab city. After air drying and passing through a 2 mm sieve, some physical and chemical properties of the soil were measured. A factorial pot experiment was conducted in a completely randomized design ...
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An appropriate amount of soil was picked up from the surface horizon (0-30 cm) from the rangeland of Darab city. After air drying and passing through a 2 mm sieve, some physical and chemical properties of the soil were measured. A factorial pot experiment was conducted in a completely randomized design with four replications. The first factor includes biochars in 7 levels (no application of biochar (C), wheat biochar (1.5 % w/w) (GB1), wheat biochar (3 % w/w) (GB2), corn biochar (1.5 % w/w) (ZB1), corn biochar (3 % w/w) (ZB2), cotton biochars (1.5 % and 3% w/w) and the second factor includes the use of lead (Pb) at 3 levels (0 (Pb0), 150 (Pb150) and 300 (Pb300) mg kg-1 soil) under forage panicum cultivation. After copmpleting vegetative growth, the plants were cutted and harvested from 0.5 cm of the soil surface. This study indicated that with increasing the biochar levels from 0 to 3 % (w/w), the electrical conductivity (0.31, 0.15 and 0.02 dS/m), soil organic carbon (53, 59 and 63%) and soil pH (0.13, 0.05 and 0.15 units) were increased and the Pb availabity (16.12, 12.83 and 10.25%) was decreased, respectively. With enhancing the Pb levels from 0 to 300 mg kg-1 soil, the concentration of soil manganese (17.27%) and potassium (4.54%) availability were significantly reduced.
Saeedeh Khaghani; Hossein Azarnivand; Mohammad Jafari; Abdollah Mollafilabi; Ali tavili
Abstract
This experiment was conducted as a split-plot factorial based on a randomized complete block design with three replications in the medicinal plants' farm of Islamic Azad University in 2017. In this experiment, water stress was considered as the main factor in four levels of irrigation including 100%, ...
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This experiment was conducted as a split-plot factorial based on a randomized complete block design with three replications in the medicinal plants' farm of Islamic Azad University in 2017. In this experiment, water stress was considered as the main factor in four levels of irrigation including 100%, 75%, 50% and 25% of the plant water requirement in the main plots. In addition, the application of different levels of zeolite (including no application of zeolite, two, four, six tons per hectare), as well as application of salicylic acid at two levels (0.5 and 1 mM) were considered as secondary factors in the form of factorial on subsidiary plots. The results showed that the effect of different levels of water stress on the traits such as plant height, number of lateral branches, plant wet weight, leaf area index, number of flowers in inflorescence was significant at 1% and on plant dry weight was significant at 5%. Salicylic acid application was also significant on some traits such as flower number in inflorescence, leaf area and dry weight at the probability level of 1%, and on plant volume and wet weight at 5% level. In addition, the effect of different levels of zeolite application was significant on plant height, number of lateral branches, wet weight, dry weight, leaf area index, number of flower in inflorescence at 1% level.
khadijeh rahimi balkanlou; Mehdi Ghorbani; mohammad jafari; ali tavili
Abstract
One of the most important preparation steps of co-management projects implementation is recognizing key actors at local community level. These actors can assist managers and planners as local leaders and social powers. By applying social network analysis and centrality index at actors’ level of ...
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One of the most important preparation steps of co-management projects implementation is recognizing key actors at local community level. These actors can assist managers and planners as local leaders and social powers. By applying social network analysis and centrality index at actors’ level of “Goormomenin” common rangeland, Kalateh region, Daamghan city in this research, social powers and local leaders in co-management procedures were identified. By social network analysis system, in-degree, out-degree centrality and betweenness centrality at actors level were studied based on trust and cooperation matrices and a combination matrix. According to the results, one of the stakeholders “Go-Bi” is a key actor in this rangeland. Based on core-periphery index, central and peripheral actors and density were identified. Having much authority and social influence, actors at central group play key role in rangeland co-management. Before implementing natural resource management projects, recognizing these actors can help governmental organizations to develop trust among villagers so that propel successful co-management procedures. These people create bridging ties between public institutions and stakeholders in rural sustainable development plans.
S.M Heshmatol Vaezin; S Ghanbari; ALI Tavili
Volume 63, Issue 2 , September 2010, , Pages 183-14
Abstract
Eremurus and forage are main by-products in the Khazangah rangelands of Makoo region. Eremurus is harvested and used by local people in a period of 30 days during the spring in this region. At this study, Eremurus and forage have been evaluated financially and the data were obtained through field work ...
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Eremurus and forage are main by-products in the Khazangah rangelands of Makoo region. Eremurus is harvested and used by local people in a period of 30 days during the spring in this region. At this study, Eremurus and forage have been evaluated financially and the data were obtained through field work using unstructured interviews as well as direct observation. The harvested Eremurus value was estimated based on harvest costs and by means of market price. The data were analyzed through financial evaluation, annual present net value and infinite present net value or expected value. The results showed that gross revenue, economical rent and economical benefit per household were 4564 and 348 thousand Rials/yr, respectively. The amount of net benefit through harvested Eremurus was also 16748 thousand Rials/ha/yr. The Rangeland Expectation Value per hectare was estimated 670 thousand Rials/yr and 10.5 million Rials/yr from Eremurus and feed, respectively. Total Rangeland Expectation Value per hectare was estimated 11.17 Thousand Rials while the ratio of Rangeland Expectation Value of Eremurus to Total Rangeland Expectation Value was computed 6 percent. The rangelands of this region have much more products. Among them forage and Eremurus have been considered at this study. These products play a main role in local economy of the region.
Salman Zare; ali Tavili; ali Shahbazi; akbar Riyahi
Volume 63, Issue 1 , June 2010, , Pages 29-40
Abstract
The objective of this research was to evaluate the effect of different concentration of salicylic acid on enhancement germination characteristics of Sanguisorba minor L. under salt and drought stress. The experimental design was factorial arranged in a completely randomized block design with four replications. ...
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The objective of this research was to evaluate the effect of different concentration of salicylic acid on enhancement germination characteristics of Sanguisorba minor L. under salt and drought stress. The experimental design was factorial arranged in a completely randomized block design with four replications. Treatment were combination of 5 levels of salt and drought stress, separately (0, -0.3, -0.6, -0.9 and -1.2 Mpa) and 4 concentration of salicylic acid (0 as a control, 100, 200 and 300 mg/lit). The results revealed that all germination characteristics decreased by increasing strength of salt and drought stress but treated seeds showed lower decrease. Application of salicylic acid increased germination percentage and rate and also decreased mean germination time significantly, but had no effect on root, shoot and seedling length. Since 200 and 300 mg/lit concentrations of Salicylic acid had more effect than the 100 mg/lit on germination attributes, on the other hand no significant difference was observed between 200 and 300 mg/lit concentrations. Considering the economic issues and also considering this fact that higher concentrations of salicylic acid may lead to accelerated stress in plant, 200 mg/lit salicylic acid concentration was suggested in S. minor in order to improve germination and seedling establishment under salt and drought stress.
M. Jafari; A. Tavili; M. Rostampour; M. A. Zare Chahouki; J. Farzadmehr
Volume 62, Issue 2 , October 2009, , Pages 197-211
Abstract
This study was carried out to investigate the effective environmental factors in the distribution of vegetation in Zirkouh rangelands of Qaen. After delimitation of the study area, sampling of soil and vegetation were performed using randomized- systematic method. Vegetation cover was recorded by using ...
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This study was carried out to investigate the effective environmental factors in the distribution of vegetation in Zirkouh rangelands of Qaen. After delimitation of the study area, sampling of soil and vegetation were performed using randomized- systematic method. Vegetation cover was recorded by using Braun-Blanquet combined abundance-cover scale in each sample. Within each sample, one profile was dug and soil samples being taken at 0-20 cm and 20-100 cm depths. Physical-chemical characteristics were determined include texture, lime, organic matter, soil moisture content, saturation moisture, EC and pH. Five vegetation groups were identified after the application of TWINSPAN method and were named after the characterizing species as follows: Salsola richteri-Aelorupes littoralis; Zygophyllum eurypterum-Haloxylon ammodendron; Artemisia sieberi-Zygophyllum eurypterum; Ammodendron persicum-Stipagrostis pennata; Artemisia aucheri-Amygdalus scoparia. The results of PCA showed that environmental factors best related with the distribution of this vegetation are texture, lime, organic matter, soil moisture content, saturation moisture, elevation and slope.
