Mohsen Padyab; Sadat Feiz Nia; Mohammad Nohtani; Hasan Ahmadi; Ardashir Shafiei
Volume 20, Issue 3 , November 2013, , Pages 345-453
Mohsen Padyab; Sadat Feyznia; Ardeshir Shafie
Volume 20, Issue 1 , June 2013, , Pages 161-171
Abstract
Floodwater spreading is a simple method for extracting floods which in most parts of the country are usually lost. However, floods are usually rich in nutrient and can fertilize coarse-grained alluvial fan and floodplain sediments. Therefore, the aim of this research was the investigation of the effect ...
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Floodwater spreading is a simple method for extracting floods which in most parts of the country are usually lost. However, floods are usually rich in nutrient and can fertilize coarse-grained alluvial fan and floodplain sediments. Therefore, the aim of this research was the investigation of the effect of floodwater spreading on soil fertility in Gachsaran floodwater spreading station. For this purpose, for measuring N, K, P, EC, pH, organic carbon and soil texture, the soil and sediments were sampled in two depths of 0-15 and 15-30 centimetersfrom first and second strips of floodwater spreading and also from the representative area (area where floodwater spreading is not performed), and the samples were analyzed in the laboratory. According to the results, the amount of P, K, N, C and EC in two areas did not show meaningful difference but pH, percentage of clay and silt, decreased and increased, respectively in floodwater spreading and representative area and showed meaningful difference. It is concluded that there was no change in soil fertility due to floodwater spreading.
Ebrahim KAzemi; Amrali Shahmoradi; Mohsen Padyab; Ardeshir Shafiee; Yaser Ghasemi Aryan
Volume 17, Issue 4 , November 2011, , Pages 564-574
Abstract
Autecology consederd as study a plant species behaviour and function and also determining its relationship with other biotic and abiotic components includes an important part of ecological studies in natural resources science. In the current research, autecology of Dorema aucheri, ...
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Autecology consederd as study a plant species behaviour and function and also determining its relationship with other biotic and abiotic components includes an important part of ecological studies in natural resources science. In the current research, autecology of Dorema aucheri, a perennial plant from Apiaceae family, was studied in range ecosystems of Kohgiloye and Boyerahmad. First of all vegetation map was provided using 1:50000 topographic maps and all characteristics including topography, climate, soil, and also companion species, root system, phenology, regenerarion, preference value, chemical compounds and frequency were studied. According to the results, Dorema aucheri grows in an elevation range of 1600 to 3400 m above sea level and in semi arid and moderate mediterian climates. The highest density of Dorema aucheri was recorded at 2300 to 3000 m above sea level. Soil texture in the study area was silty clay loam, silty clay, clay, silty loam and loam. Soil EC differed from 0.21 to 0.5 ds/m and a pH range of 7.5 to 8.2 was obtained. Average annual precipitation is 750 mm and temperature differed from -11 to 35 centigrade degree. Vegetative growth starts in early March and ends in early April. Its flowering stage is from mid April to May. Seed ripening stage is in mid July and no autumn growth was recorded. Root spreads in vertical (>200cm) and horizontal (>150cm) dieractions. Despite this plant is not palatable, it is used by livestock in absence of other palatable species. Human also utilizes this species as food or medicinal purposes.