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| Surname: Soltani Siahpush Name: Somaie |
| Title of thesis: Effect of soil salinity and phosphorous fertlizer on P absorption and growth indices of corn |
| Supervisors: Dr. kazem Hashemimajd Advisor: Dr. Nosratollah Najafi, M.Sc. Shahram Seyedin |
| Graduate Degree: M.Sc. major: Agricultural Engineering Specialty: Soil Science University: Mohaghegh Ardabili Faculty: Agriculture graduation date: ۲۰۱۱/۹/۱۴ Number of page: ۸۸ |
| Key words: Corn, Growth parameters, Salinity,Yield, Phosphorus |
| Abstract: One of the most important problems that hinder agricultural progression around the world is the salinity of soil and water. Limited researches were carried out about interaction between fertilization and salinity on crop performance in Iran. In order to investigate the effect of different phosphorus levels on corn growth characteristics in saline soils of Ardabil region, an experiment was conducted with 10 levels of salinity (S1= 0.75, S2= 1.2, S3= 2.29, S4= 3.3, S5= 4.25, S6= 5.11, S7= 6.19, S8= 8.8, S9= 10.88, S10= 14 dS/m) and 5 levels of phosphorus (P1= 0, P2= 50, P3= 100, P4=200, P5=400 kg/ha) in 3 replicates under greenhouse conditions as a factorial combination with randomized complete blocks design . Initial soil samples were collected from 45 different points of Zaranas basin in Ardabil region. After determination of soil properties, 10 soil samples with different salinity levels were selected to the experiment. Phosphorus was supplied as di-ammonium phosphate source. Results showed that with increasing P level the growth indices (plant height, stem diameter, number and leaf area, and chlorophyll content of leaves), dry and wet weight of shoot and root were significantly increased while with the elevation of salinity were significantly decreased. The combined effect of salinity and phosphorous on chlorophyll content and dry and wet weight of shoot and root but there was not significant effect on other growth indices. The effect of pH and EC after harvest was significant at 1% level while effect of P and the combined effect of salinity and phosphorous on pH and EC of soil were not significant. Salinity and Phosphorous of available P after harvest and P concentration of shoot and root were significant. |
University of Mohaghegh Ardabili
Faculty of Agriculture
Department of Soil Science
Effect of soil salinity and phosphorous fertlizer on P absorption and growth indices of corn
Supervisors:
Dr. kazem Hashemimajd
Advisors:
Dr. Nosratollah Najafi, M.Sc. Shahram Seyedin
By:
Somaie Soltani Siahpush
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