SIMULATION OF NITROGEN LOSSES UNDER WHEAT PRODUCTION IN GORGAN, USING CROPSYST MODEL

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SOLTANI E.; SOLTANI A.; ZEINALI E.; DASTMALCHI A.

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Journal: Journal of Water and Soil Conservation Year:2013 | Volume:20 | Issue:4 Page(s): 145-163

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Title

SIMULATION OF NITROGEN LOSSES UNDER WHEAT PRODUCTION IN GORGAN, USING CROPSYST MODEL

Author(s)

SOLTANI E. | SOLTANI A. | ZEINALI E. | DASTMALCHI A. | Issue Writer Certificate

Keywords

N LOSSESQ1

NH3 VOLATILIZATIONQ2

N LEACHINGQ2

DENITRIFICATIONQ2

WHEATQ3

Abstract

This study was conducted to evaluate CropSyst model to predict the fate and residual N of WHEAT production system in Gorgan-Northeast of Iran and to estimate N LOSSES in different WHEAT management scenarios. Evaluation of CropSyst to predict N uptake and residual N in soil profile were performed using 16 local fields in Gorgan. Simulation of N LOSSES in WHEAT production systems were conducted during 1967-2009 (40 years). Simulation scenarios were irrigated cultivation (average input; AI), irrigated cultivation (High input; HI) and rainfed cultivation (low input; LI). Results indicated that CropSyst model could satisfactorily predict yield, N uptake, residual N of WHEAT production system. WHEAT yield of scenarios were 4400, 4500 and 4000 (kg/ha) for AI, HI and LI respectively that LI yield was significantly lower than AI and HI. Total N LOSSES in AI, HI and LI were 13.5, 18.1 and 9.8 (kg N/ha) respectively. The highest losses of N had occurred by gaseous loss (45 to 63% of total N LOSSES) in which volatilization (NH3(g)) contributed about 45 to 61% of total N LOSSES and scenarios had significant differences. Nitrate leaching scenarios were not significantly different and it was about 3 kg N/ha. It can be concluded that application of urea as topdressing led to increase N LOSSES (NH3 volatilization) and changing of the type of fertilizer and fertilizer management could reduce N LOSSES.

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APA: Copy

SOLTANI, E., SOLTANI, A., ZEINALI, E., & DASTMALCHI, A.. (2013). SIMULATION OF NITROGEN LOSSES UNDER WHEAT PRODUCTION IN GORGAN, USING CROPSYST MODEL. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 20(4), 145-163. SID. https://sid.ir/paper/156538/en

Vancouver: Copy

SOLTANI E., SOLTANI A., ZEINALI E., DASTMALCHI A.. SIMULATION OF NITROGEN LOSSES UNDER WHEAT PRODUCTION IN GORGAN, USING CROPSYST MODEL. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2013;20(4):145-163. Available from: https://sid.ir/paper/156538/en

IEEE: Copy

E. SOLTANI, A. SOLTANI, E. ZEINALI, and A. DASTMALCHI, “SIMULATION OF NITROGEN LOSSES UNDER WHEAT PRODUCTION IN GORGAN, USING CROPSYST MODEL,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 20, no. 4, pp. 145–163, 2013, [Online]. Available: https://sid.ir/paper/156538/en

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