Miremadi, Rouhollah (2011) Effect of Ground Water Salinity, Corn and Millet Plant on the Movement of Water and Salts in Soil. Masters thesis, University of Zabol.
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Abstract
Nowadays, the effects and the relationship among soil, water and plant are interested to researchers, in addition to identifying the relationship among them, identify existing damage and provide solution for them. In this research, the effect of the groundwater salinity on the movement of water and salts in soil and its effect on soil salinity of surface layers have been studied. For these purposes the soil columns (80 cm height and 45 cm diameter) were prepared. The experiment consisted of two rows of cultivated soils with millet and corn and the one row was bare soil. The groundwater salinity in three treatments 0.53, 4.75 and 8.85 dS/m were used. The groundwater tanks connected to the soil columns and groundwater entered from bottom of the soil columns. Everyday, an amount of water was added to specify height to groundwater tanks until the water level be controlled in the tanks. Amount of added water was calculated as the Evapotranspiration for each soil column. For measurement of soil moisture, once every two days of layers 0-20, 20-40 and 40-60 cm of soil, soil moisture was measured using TDR. To investigation of the soil salinity and the concentration of sodium, potassium, calcium, magnesium, chloride and phosphate in the soil layers, samples were taken from soil layers once every fifteen days. After taking saturation extract of soil samples, the salinity and concentration of elements were determined. The results showed that Evapotranspiration of corn and millet in the groundwater salinity have been less and in the bare soil, groundwater salinity changes have not significant influence on evaporation from soil. In the 0-20 cm layer, due to water absorption by roots and evaporation from this layer, moisture content is much lower than the underlay. The soil moisture in the 20- 40 and 40-60 cm layers show increasing trends and in the 0-20 cm layer was almost constant. Soil salinity levels in the 0-20, 20-40 and 40-60 cm for all treatments of groundwater in the soil columns of millet, maize and bare soil increased. Moreover, the increase of soil salinity in bare soil was more than millet and corn. Due to the determination of absorption of some elements by corn and millet, the reason can be absorption of elements by the plants. Elements analysis shows that concentrations of sodium, potassium, calcium, magnesium, chloride and phosphate in the surface layer (0- 20 cm) for the all treatments of the groundwater in millet, corn and bare soil increased.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Groundwater salinity, Evapotranspiration, Corn, Millet, Movement of Water and salts |
| Subjects: | S Agriculture > S Agriculture (General) |
| Depositing User: | admin admin1 admin2 |
| Date Deposited: | 20 Apr 2016 05:40 |
| Last Modified: | 20 Apr 2016 05:40 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/410 |
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