Mohsen Asadollahi; Mohammad Jafari; vahid sayare; Ali esmaeili; Mohammad Tahmoures
Abstract
Wind erosion is one of the most important aspects of land degradation in arid and semi-arid regions, which 20% of land area of the world has been influenced by wind erosion. The wind increases the desertification process by displacing sand dunes. Therefore, the stabilizition and preventing the moving ...
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Wind erosion is one of the most important aspects of land degradation in arid and semi-arid regions, which 20% of land area of the world has been influenced by wind erosion. The wind increases the desertification process by displacing sand dunes. Therefore, the stabilizition and preventing the moving sands is essential. A strategy to combat this phenomenon is to reduce wind speed or to increase surface cover and soil resistance against erosion winds. The application of mulch or soil cover is one of the methods widely used to stabilize moving sands. For this purpose, a study was done at the Research Station International Desert Research Centre in Kashan city. The main purpose of this study was to investigate the effect of Multivariate biopolymer treatment at three concentrations (15%, 30% and 60%) on the moisture content of three sand depths (first depth of 0-5 cm, second depth of 5-10 cm and depth of third 10-20 cm), and study this mulch Compared with levels without mulch on the sand. Results showed soil moisture retention in Mulching compared to the control treatment, and statistically, there was significant differences between different depths of soil moisture Mulching compared to the control treatment and in between the first, second and third depths, the first depth had the highest increase in moisture holding compared to the Control treatment.
maryam mombeni; hamid reza asgari; ali Mohammadian Behbahani; Salman Zare; hossein yousefi
Abstract
One of the main challenges of land degradation management in arid and desert areas of Iran is the stabilization of sand as well as the control of dust; therefore the use of mulches, particularly eco-friendly mulch, is one of the ways to stabilize sand used. The purpose of this study was to investigate ...
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One of the main challenges of land degradation management in arid and desert areas of Iran is the stabilization of sand as well as the control of dust; therefore the use of mulches, particularly eco-friendly mulch, is one of the ways to stabilize sand used. The purpose of this study was to investigate the possibility of using residues such as black liqueur and malass as mulch to stabilize the sand. To prepare the substrate for treatments in the laboratory environment, Rig Boland sandy of Kashan was used. Metal trays with dimensions of 100 × 30 × 2 cm were used for the experiments. For spraying of malass, black liquor and control treatments in a single layer and double layer of 2.5-liter sprinkler were applied and a completely randomized design with three replications was performed. To evaluate the performance of these materials, the shear strength, saturation, and dry strength and water permeability were measured and the data were analyzed by appropriate statistical software. In vitro results showed that the penetration resistance of molasses and black liqueur mulches were 9.8 and 7.8 kN/m2, respectively. These two types of mulch have significant differences with each other and with control (water) treatment. The highest penetration and shear strength were related to Malass treatment, which increased the penetration resistance by 9.8 times and the shear resistance by 14 times. The infiltration rate in one-layer liqueur mulch was significantly different compared to Malass and control (water) mulches, while the infiltration rate decreased with increasing thickness.
