Modelling forage yield and water productivity of continuous crop sequences in the Argentinian Pampas

Article


Ojeda, J. J., Pembleton, K. G., Caviglia, O. P., Islam, M. R., Agnusdei, M. G. and Garcia, S. C.. 2018. "Modelling forage yield and water productivity of continuous crop sequences in the Argentinian Pampas." European Journal of Agronomy. 92, pp. 84-96. https://doi.org/10.1016/j.eja.2017.10.004
Article Title

Modelling forage yield and water productivity of continuous crop sequences in the Argentinian Pampas

ERA Journal ID5307
Article CategoryArticle
AuthorsOjeda, J. J. (Author), Pembleton, K. G. (Author), Caviglia, O. P. (Author), Islam, M. R. (Author), Agnusdei, M. G. (Author) and Garcia, S. C. (Author)
Journal TitleEuropean Journal of Agronomy
Journal Citation92, pp. 84-96
Number of Pages13
Year2018
PublisherElsevier
Place of PublicationNetherlands
ISSN1161-0301
1873-7331
Digital Object Identifier (DOI)https://doi.org/10.1016/j.eja.2017.10.004
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S1161030117301508
Abstract

In recent years, the use of forage crop sequences (FCS) has been increased as a main component into the animal rations of the Argentinian pasture-based livestock systems. However, it is unclear how year-by-year rainfall variability and interactions with soil properties affect FCS dry matter (DM) yield in these environments. Biophysical crop models, such as Agricultural Production Systems Simulator (APSIM), are tools that enable the evaluation of crop yield variability across a wide of environments. The objective of this study was to evaluate the APSIM ability to predict forage DM yield and water productivity (WP) of multiple continuous FCS. Thirteen continuous FCS, including winter and summer crops, were simulated by APSIM during two/three growing seasons in five locations across the Argentinian Pampas. Our modelling approach was based on the simulation of multiple continuous FCS, in which crop DM yields depend on the performance of the previous crop in the same sequence and the final soil variables of the previous crop are the initial conditions for the next crop. Overall, APSIM was able to accurately simulate FCS DM yield (0.93 and 3.2 Mg ha−1 for concordance correlation coefficient [CCC] and root mean square error [RMSE] respectively). On the other hand, the model predictions were better for annual (CCC = 0.94; RMSE = 0.4 g m−2 mm−1) than for seasonal WP (CCC = 0.71; RMSE = 1.9 g m−2 mm−1), i.e. at the crop level. The model performance to predict WP was associated with better estimations of the soil water dynamics over the long-term, i.e. at the FCS level, rather than the short-term, i.e. at the crop level. The ability of APSIM to predict WP decreased as seasonal WP values increased, i.e. for low water inputs. For seasonal water inputs, <200 mm, the model tended to under-predict WP, which was directly associated with crop DM yield under-predictions for frequently harvested crops. Even though APSIM showed some weaknesses in predicting seasonal DM yield and WP, i.e. at the crop level, it appears as a potential tool for further research on complementary forage crops based on multiple continuous FCS in the Argentinian livestock systems.

KeywordsAPSIM; forages; livestock systems; model validation; maize
ANZSRC Field of Research 2020300205. Agricultural production systems simulation
300207. Agricultural systems analysis and modelling
300403. Agronomy
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Byline AffiliationsNational Scientific and Technical Research Council, Argentina
School of Agricultural, Computational and Environmental Sciences
National Research Council, Argentina
University of Sydney
National Institute of Agricultural Technology, Argentina
Institution of OriginUniversity of Southern Queensland
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Impact of grazing on the silage yield of forage oat crops
Pembleton, Keith G., Harrison, Matthew T. and Rawnsley, Richard P.. 2013. "Impact of grazing on the silage yield of forage oat crops." 22nd International Grassland Congress: Revitalising Grasslands to Sustain Our Communities. Sydney, Australia 15 - 19 Sep 2013 Australia.
Early sowing and irrigating of rape crops in cool temperate environments boosts forage yield potential
Harrison, Matthew T., Pembleton, Keith G. and Rawnsley, Richard P.. 2013. "Early sowing and irrigating of rape crops in cool temperate environments boosts forage yield potential." 22nd International Grassland Congress: Revitalising Grasslands to Sustain Our Communities. Sydney, Australia 15 - 19 Sep 2013 Australia.
Frost risk associated with growing maize for silage on Tasmanian dairy farms
Pembleton, Keith. 2012. "Frost risk associated with growing maize for silage on Tasmanian dairy farms." Rawnsley RP (ed.) 16th Australian Agronomy Conference: Capturing Opportunities and Overcoming Obstacles in Australian Agronomy (ASA 2012). Armidale, Australia 14 - 18 Oct 2012 Armidale, Australia.
Partitioning of taproot constituents and crown bud development are affected by water deficit in regrowing alfalfa (Medicago sativa L.)
Pembleton, Keith G., Volenec, Jeffrey J., Rawnsley, Richard P. and Donaghy, Daniel J.. 2010. "Partitioning of taproot constituents and crown bud development are affected by water deficit in regrowing alfalfa (Medicago sativa L.)." Crop Science: a journal serving the international community of crop scientists. 50 (3), pp. 989-999. https://doi.org/10.2135/cropsci2009.03.0140
Yield, yield components and shoot morphology of four contrasting lucerne (Medicago sativa) cultivars grown in three cool temperate environments
Pembleton, K. G., Donaghy, D. J., Volenec, J. J., Smith, R. S. and Rawnsley, R. P.. 2010. "Yield, yield components and shoot morphology of four contrasting lucerne (Medicago sativa) cultivars grown in three cool temperate environments." Crop and Pasture Science. 61 (6), pp. 503-511. https://doi.org/10.1071/CP09351
Genotype by environment interactions of lucerne (Medicago sativa L.) in a cool temperate climate
Pembleton, K. G., Smith, R. S., Rawnsley, R. P., Donaghy, D. J. and Humphries, A. W.. 2010. "Genotype by environment interactions of lucerne (Medicago sativa L.) in a cool temperate climate." Crop and Pasture Science. 61 (6), pp. 493-502. https://doi.org/10.1071/CP09269
Effect of summer irrigation on seasonal changes in taproot reserves and the expression of winter dormancy/activity in four contrasting lucerne cultivars
Pembleton, K. G., Cunningham, S. M. and Volenec, J. J.. 2010. "Effect of summer irrigation on seasonal changes in taproot reserves and the expression of winter dormancy/activity in four contrasting lucerne cultivars." Crop and Pasture Science. 61 (11), pp. 873 - 884. https://doi.org/10.1071/CP10030
Utilising leaf number as an indicator for defoliation to restrict stem growth in rhodes grass (Chloris gayana) cv. Callide
Pembleton, K.G., Lowe, K.F. and Bahnisch, L.M.. 2009. "Utilising leaf number as an indicator for defoliation to restrict stem growth in rhodes grass (Chloris gayana) cv. Callide." Tropical Grasslands. 43, pp. 79-85.
Water deficit alters canopy structure but not photosynthesis in regrowing alfalfa (Medicago sativa L.)
Pembleton, Keith, Rawnsley, Richard P., Donaghy, Daniel J. and Volenec, Jeffrey J.. 2009. "Water deficit alters canopy structure but not photosynthesis in regrowing alfalfa (Medicago sativa L.)." Crop Science: a journal serving the international community of crop scientists. 49 (2), pp. 722-731. https://doi.org/10.2135/cropsci2008.08.0456
Effect of defoliation interval and height on the growth and quality of Arachis pintoi cv. Amarillo
Sinclair, K., Lowe, K.F. and Pembleton, K.G.. 2007. "Effect of defoliation interval and height on the growth and quality of Arachis pintoi cv. Amarillo." Tropical Grasslands. 41 (4), pp. 260-268.
Potential of tropical forages for the Tasmanian dairy industry
Pembleton, Keith, Rawnsley, Richard, Donaghy, Danny and Chamberlain, Peter. 2006. "Potential of tropical forages for the Tasmanian dairy industry." 13th Australian Agronomy Conference 2006. Perth, Australia 10 - 14 Sep 2006 Australia. Australian Society of Agronomy.