Login | Create Account (DAF staff only)

Using APSIM-soiltemp to simulate soil temperature in the podding zone of peanut

Chauhan, Y. and Wright, G. and Rachaputi, N.R. and Krosch, S. and Robertson, M. and Hargreaves, J. and Broome, A. (2007) Using APSIM-soiltemp to simulate soil temperature in the podding zone of peanut. Australian Journal of Experimental Agriculture, 47 (8). pp. 992-999.

Full text not currently attached. Access may be available via the Publisher's website or OpenAccess link.

Article Link(s): http://dx.doi.org/10.1071/EA06137

Publisher URL: http://www.publish.csiro.au

Abstract

Measurement or accurate simulation of soil temperature is important for improved understanding and management of peanuts (Arachis hypogaea L.), due to their geocarpic habit. A module of the Agricultural Production Systems Simulator Model (APSIM), APSIM-soiltemp, which uses input of ambient temperature, rainfall and solar radiation in conjunction with other APSIM modules, was evaluated for its ability to simulate surface 5 cm soil temperature in 35 peanut on-farm trials conducted between 2001 and 2005 in the Burnett region (25°36'S to 26°41'S, 151°39'E to 151°53'E). Soil temperature simulated by the APSIM-soiltemp module, from 30 days after sowing until maturity, closely matched the measured values (R2 ≥ 0.80)in the first three seasons (2001-04). However, a slightly poorer relationship (R2 = 0.55) between the observed and the simulated temperatures was observed in 2004-05, when the crop was severely water stressed. Nevertheless, over all the four seasons, which were characterised by a range of ambient temperature, leaf area index, radiation and soil water, each of which was found to have significant effects on soil temperature, a close 1:1 relationship (R2 = 0.85) between measured and simulated soil temperatures was observed. Therefore, the pod zone soil temperature simulated by the module can be generally relied on in place of measured input of soil temperature in APSIM applications, such as quantifying climatic risk of aflatoxin accumulation.

Item Type:Article
Business groups:Agri-Science, Crop and Food Science
Additional Information:© CSIRO.
Keywords:APSIM-soiltemp; soil temperature; podding zone; peanut; modelling.
Subjects:Plant culture > Fruit and fruit culture > Nuts
Science > Statistics > Simulation modelling
Agriculture > Agriculture (General) > Soils. Soil science
Deposited On:14 Apr 2009 06:42
Last Modified:27 Oct 2011 01:39

Repository Staff Only: item control page