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Showing 3 results for Ghobadinia
Influence of Natural Zeolite on the Soil Nitrates Irrigated with Wastewater: Study on Application Method, Particle Size and Dosage of Zeolite
H. Taheri Sodejani, S.h. Tabatabaei, M. Ghobadinia, H. Kazemian,
Volume 18, Issue 67 (Spring 2014)
Abstract
Zeolites are substances that have been renowned for their remarkable nitrogen adsorption capacity resulting of decrease in leaching rate of soil nitrogen. This research was conducted to study the effect of the zeolite dosage, zeolite particle size and the method of application on the nitrate leaching of the soil irrigated by treated wastewater (TWW). All of the adsorption tests were carried out in a 27 PVC columns with 11 cm diameter and 60 cm length. The experiments were consisted of 9 treatments and 3 replications including 2 zeolite application method (mixed and layered), 2 zeolite’s grain size (63-125 and <63 micrometer) and 2 zeolite dosage (2 and 4 percent). Zeolite powders were added to the soil in mixed or layered fashion. The soil columns were irrigated 13 times with TWW in a weekly period. In the 4th, 9th and 13th irrigation event, three samples were taken from input and output TWW introduced to columns to measure the change in nitrate concentration. The results were shown that nitrate absorption rate was increased by average of 164.3% and 350.7% in mixed and layered treatments, respectively compared to the control. The result showed that zeolite application method, irrigation event, zeolite’s grain size and dosage were statistically significant on nitrate absorption efficiency (P<0.01). It shows that as the zeolite size decrease the soil nitrate adsorption increases significantly. It increases when the zeolite percentage increases. The result show that the soil nitrate adsorption decreases as the irrigation event increase and soil adsorption potential degraded with irrigation events.
The effect of long-term irrigation with municipal treated wastewater on the saturated hydraulic conductivity of a silt loam soil and its estimation- a case study
H. Beigi Harchegani, G. Banitalebi, M. Ghobadinia,
Volume 21, Issue 1 (Spring 2017)
Abstract

Treated wastewater may influence soil structure, porosity and as a consequence, soil saturated hydraulic conductivity. This study aims to assess the effect of wastewater on saturated hydraulic conductivity; and to determine the suitable soil solids fractal dimension to incorporate into the pedotransfer function by Rawls et al (1993) for estimation of saturated hydraulic conductivity (Ks). Soil saturated hydraulic conductivity was measured by disc permeameter. Soil particle fractal dimension was calculated from linearized forms of mass- time, mass- diameter and mass- diameter as modified by Kravchenko- Zhang (1998) relations. Wastewater irrigation for 13 years increased the saturated hydraulic conductivity three times, from 7 mm/hour to 21 mm/hour, but longer application of wastewater did not further increase it. Rawls et al (1993) pedotransfer produced acceptable and relatively close saturated hydraulic conductivity values to that of disc permeameter when fractal dimension obtained from the linearized forms of mass- diameter and Kravchenko- Zhang relations were used. Therefore, Rawls et al (1993) pedotransfer was capable of reflecting the effect of wastewater application on soil saturated hydraulic conductivity.
 


Evaluation of the Impact of Different Irrigation Deficit Treatments on the Yield, Yield Components, and Water Use Productivity of Autumn Wheat (Case Study: Shahrekord)
B. Naderi-Samani, M. Ghobadinia1, B. Haghighati, S.m.r. Hosseini-Vardanjani, A.r. Ahmadpour-Samani,
Volume 29, Issue 1 (Spring 2025)
Abstract
Awareness of the impact of water deficit stress on the quantitative and qualitative performance of agricultural products, considering the recent recurrent droughts and reduced precipitation, is essential for water consumption management. This study aimed to evaluate the effects of different irrigation deficit treatments on the yield, yield components, and water use efficiency of autumn wheat in the Shahrekord region. An experiment with three replications was conducted in a completely randomized block design at the Agricultural and Natural Resources Research Center of Chaharmahal Va Bakhtiari Province during 2023-2024. The experimental treatments included four irrigation levels: full irrigation (T100), 80% of full irrigation (T80), 60% of full irrigation (T60), and 40% of full irrigation (T40). The application of the T60 deficit irrigation treatment resulted in a reduction of more than 14% in grain yield, while the T80 treatment caused a more than 31% decrease in grain yield. Additionally, the T60 treatment exhibited the highest water use efficiency at 1.22 kg per cubic meter, while the water use efficiency for the T100, T80, and T40 treatments was 1.06, 1.12, and 1.19 kg per cubic meter, respectively. The results showed that water deficit irrigation significantly affected the grain yield, biomass, and water use efficiency of autumn wheat under the climatic conditions of the Shahrekord region. The results of this study indicated that the T80 deficit irrigation treatment could have a more acceptable performance in terms of water efficiency.

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