Simulating soybean-wheat cropping system: APSIM model parameterization and validation

Mohanty, M., Probert, M. E., Reddy, K. S., Dalal, R. C., Mishra, A. K., Rao, A. S., Singh, M. and Menzies, N. W. (2012) Simulating soybean-wheat cropping system: APSIM model parameterization and validation. Agriculture Ecosystems & Environment, 152 68-78. doi:10.1016/j.agee.2012.02.013


Author Mohanty, M.
Probert, M. E.
Reddy, K. S.
Dalal, R. C.
Mishra, A. K.
Rao, A. S.
Singh, M.
Menzies, N. W.
Title Simulating soybean-wheat cropping system: APSIM model parameterization and validation
Journal name Agriculture Ecosystems & Environment   Check publisher's open access policy
ISSN 0167-8809
1873-2305
Publication date 2012-05
Sub-type Article (original research)
DOI 10.1016/j.agee.2012.02.013
Volume 152
Start page 68
End page 78
Total pages 11
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2013
Language eng
Formatted abstract
In recent years, nutrient management of soybean–wheat systems in central India has become a cause for concern because of stagnation of grain yields of soybean and wheat. The reduction in grain yield was mainly attributed to a suboptimal supply of nutrients to both the crops, use of poor quality farmyard manures and erratic distribution of rainfall during soybean’s growing season and unavailability of irrigation
water during wheat season. In this connection, the crop growth simulation models are handy in identifying the constraints to yield and recommending appropriate  management practices to optimize the productivity of soybean–wheat system. To achieve this, the APSIM model was parameterized and validated for soybean and wheat crop of subtropical central India. Independent data set was used to  parameterize soybean cultivar (JS 335) and wheat cultivar (Sujata) to be used for APSIM simulation. Genetic coefficient generated from this study was used for  subsequent model validation. The data on water use, N uptake, grain yield and soil organic C from an ongoing longterm experiment was used for validation purpose. Three nutrient treatments, viz., control (no nutrient), inorganic (recommended rate) and FYM (8 t ha−1 to soybean and 16 t ha−1 to wheat) were used to validate the APSIM model. For organic treatments, we simulated N management using the FYM as the  source of plant available N under field condition. The model was parameterized by specifying the N mineralized from the manure in the laboratory incubation. The model predicted successfully grain yield and N uptake under FYM treatments in soybean and wheat. For other treatments, model prediction was satisfactory in most of the cases in  simulating water and organic carbon, grain yield and N uptake by both the crops. The discrepancy observed between the observed and predicted yield in the control under soybean was due to the P limiting condition of the treatment rather than the model. The predicted variability of crop yield was also due to the variation of weather during soybean growing season and amount of irrigation and N used during wheat growing season. Therefore, this APSIM simulation study can satisfactorily be used to make appropriate management decisions to provide farmers and others with alternative  options for nutrient management for soybean–wheat cropping systems.
Keyword Soybean
Wheat
N management
Fym
Apsim
Central India
Water-Use Efficiency
Fertilizer Phosphorus
Farming Systems
Cattle Manure
Yields
Irrigation
India
Vertisol
Mineralization
Variability
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Official 2013 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 12 times in Thomson Reuters Web of Science Article | Citations
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