Evaluating the Capability of the NLEAP Model to Predict the Movement of Moisture and Nitrat Accoumulation in the Soil

Document Type: Original Article

Authors

1 M. Sc. Irrigation and Drainage Department, Department of Water Engineering, of Abu Ali Sina, University Hamedan,Iran.

2 Assistant Professor of Water Engineering, University of ABu-Ali Sina, Hamedan,Iran.

Abstract

The relationship between the accumulation of nitrate in the soil and its concentration in groundwater and in various plant systems is still not fully understood, but it indicates a high correlation between nitrate leaching and environmental and managerial factors. In this study in order to model the movement of nitrate in the soil profile and loss of fertilizer in the root zone using NLEAP GIS 4.2.NLEAP is used in order to model the movement of nitrogen in soils with artificial drainage system Data from farm ARC2-14 of sugarcane research area in Amirkabir unit (one of the seven unites of sugarcane development) was used and irrigation treatment consisted of full irrigation (I1), 85% (I2) and 70% (I3) of full irrigation and amount of nitrogen fertilizer including area was 150 (N1), 250 (N2) and 350 Kg per hectare. Measured values of nitrate and water content in the soil profile and predicted values during the study period were evaluated. The results show that the NLEAP models have predicted the concentration of soil nitrate. Also range of parameters of AE, RMSE and R2 to estimate the concentration of nitrate in the soil profile is -1.4 to 2.3, -1.7 to 3 and 0.3 to 0.99.  

Keywords


بهمنی،ا.برومند نسب، س. بهزاد،موناصری، ع. ع. (1388). بررسی میزان تجمع نیترات و آمونیوم در نیمرخ خاک تحت رژیم­های آبی و کودی مختلف با استفاده از مدل LEACHM. مجله علوم محیطی، دوره 7، شماره 2،  ص 108-95.

بهمنی، ا. (1388). بررسی حرکت و تجمه نیترات در خاک تحت تنش آبی با استفاده از مدل LEACHM و شرایط مزرعه ای در گیاه نیشکر. پایان­نامه دکتری رشته آبیاری زهکشی، گروه آبیاری و زهکشی، دانشکده مهندسی علوم آب، دانشگاه شهید چمران اهواز.

کاویانی،ع.،لیاقت،ع و سهرابی،ت. (1390). بررسی عوامل موثر بر غلظت نیترات آبشویی شده محصولات یونجه، ذرت و سبزیجات با استفاده از مدل NLEAP. مجله پژوهش آب در کشاورزی، دوره 25، شماره 2، ص 166-147.

Davies, D. B. and Sylvester-Bradley, R. (1995). The contribution of fertilizer nitrogen to leach able nitrogen in the UK: a review. Journal of the Science of Food and Agriculture 68, pp: 399- 406.

Antonopoulos, V. Z. (1997). Simulation of soil moisture dynamics on irrigated cotton in semi-arid climates. Agriculture Water Management, 34, pp: 233-246.

Alva, A. K. and Paramasivam, S. (2006). Nitrogen best management practice for citrus trees II. Nitrogen fate, transport and components of N budget. Scientia Horticulturae. 109, pp: 223–233.

Tarkalson, D. D. (2006). Nitrate accumulation and movement under deficit irrigation in soil receiving cattle manure and commercial fertilizer. Agricultural water management. 85, pp: 201- 210.

Follet, R. F. (1991). Managing Nitrogen for Groundwater Quality and Farm Profitability, SSCA.

Boiron, M., Morari, F., Bonaiti, G., Passch, M. and Skaggs, R. W. (2000). Analysis of DRAINMOD performances with different detail of soil input data in the Vento region of Italy. Agriculture Water Management. 42 (3), pp: 259-272.

Jaynes, D. B., Clvin, T. S., Karlen, D. L., Cambardella, C. A. and Meek, D. W. (2001). Nitrate loss subsurface drainage as affedted by nitrogen fertilizer rate. Journal of Enviromental quality. 30(4), pp: 1305-1314.

Mack, U. D., Feger, K. H., Gong, Y. and Stahr, K. (2005). Soil water balance and nitrate leaching in 30 Mirania,S., Mohammadian, M. and W.M. Fallah. Nitrogen management in irrigated agriculture. Mazandaran University Pub. Iran (in Persian).

Sadek, A. E., Feyen, J. and Ragab, R. (2002). Simulation of nitrogen balance of maize field under different drainage strategies using the DRAINMOD-N model. Jourrnal of Irrigation and Drainage Engineering. 51(1), pp: 61-75.