IMPACT OF MOISTURE ANALYSIS ON COEFFICIENTS OF NITROGEN CYCLE CONVERSION UNDER MAIZE FURROW IRRIGATION USING HYDRUS-1D MODEL

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NAVABIAN M.; JALILNEJAD MASOLEH N.

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Journal: Journal of Water and Soil Conservation Year:2016 | Volume:22 | Issue:6 Page(s): 245-258

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Title

IMPACT OF MOISTURE ANALYSIS ON COEFFICIENTS OF NITROGEN CYCLE CONVERSION UNDER MAIZE FURROW IRRIGATION USING HYDRUS-1D MODEL

Author(s)

NAVABIAN M. | JALILNEJAD MASOLEH N. | Issue Writer Certificate

Keywords

FURROW IRRIGATIONQ2

NITROGEN SIMULATIONQ2

CORNQ2

DENITRIFICATION RATEQ2

Abstract

Background and Objectives: Complexity, variety and improper management of agricultural contaminants and high volume of water losses due to improve design and management of irrigation and drainage systems increase share of agriculture in water resources, soil and environment contamination. Control and reducing of nitrogen pollution caused by fertilizer is needed to understand the biological cycle in the ecosystem. Simulation models are effective tools for understanding complex processes such as the nitrogen cycle in soil. The aim of this study was to simulate nitrogen cycle and evaluate the impact of soil moisture content on denitrificaton rate under furrow fertigation systems using HYDRUS–1D model.Materials and Methods: To achieve the aim of this study, field experiments were conducted under constant furrow fertigation in the furrow with 83 meters length and clay loam soil texture in Karaj in 2007. HYDRUS-1D was used to simulate nitrogen cycle in fertigation. The conversion coefficients of nitrogen cycle included dispersion coefficient and order conversions from the parameters of nitrogen cycle based on observational data, soil moisture and nitrate concentrations using inverse modeling techniques that were obtained. To study plant effect on the nitrogen cycle, the model is studied in presence and absence of plant.Results: The results showed that modified Van Genuchten method performance with mean of soil nitrate concentration (mg/l) and moisture (%) RMSE=0.02879 and R2=0.9899, considering presence of plants better estimate of parameter values of nitrogen cycle concentrations in CORN FURROW IRRIGATION. Also, maximum soil moisture that denitrificaton occurred, was obtained in 50% of the saturation moisture. Using denitrificaton coefficient in the simulation of the nitrogen cycle in CORN fertigation led to improve in results.Conclusion: The results showed that soil hydraulic properties and plant had more effect on nitrate changes to nitrite and nitrogen gas forms than anaerobic percentage of soil profile.

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APA: Copy

NAVABIAN, M., & JALILNEJAD MASOLEH, N.. (2016). IMPACT OF MOISTURE ANALYSIS ON COEFFICIENTS OF NITROGEN CYCLE CONVERSION UNDER MAIZE FURROW IRRIGATION USING HYDRUS-1D MODEL. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 22(6), 245-258. SID. https://sid.ir/paper/156351/en

Vancouver: Copy

NAVABIAN M., JALILNEJAD MASOLEH N.. IMPACT OF MOISTURE ANALYSIS ON COEFFICIENTS OF NITROGEN CYCLE CONVERSION UNDER MAIZE FURROW IRRIGATION USING HYDRUS-1D MODEL. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2016;22(6):245-258. Available from: https://sid.ir/paper/156351/en

IEEE: Copy

M. NAVABIAN, and N. JALILNEJAD MASOLEH, “IMPACT OF MOISTURE ANALYSIS ON COEFFICIENTS OF NITROGEN CYCLE CONVERSION UNDER MAIZE FURROW IRRIGATION USING HYDRUS-1D MODEL,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 22, no. 6, pp. 245–258, 2016, [Online]. Available: https://sid.ir/paper/156351/en

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