Muleke, A and Harrison, MT and Eisner, R and de Voil, P and Yanotti, M and Liu, K and Monjardino, M and Yin, X and Wang, W and Nie, C and Ferreira, C and Zhao, J and Zhang, F and Fahad, S and Surpali, N and Puyu, F and Zhang, Y and Forster, D and Yang, R and Qi, Z and Fei, W and Goa, X and Man, J and Lixiao, N, Sustainable intensification with irrigation raises farm profit despite climate emergency, Second COBE HDR Annual Conference, 25- 26 October 2022, Hobart, Australia, pp. 16. (2022) [Conference Extract]
Background:Research aimed at improving crop productivity often does not account for the complexity of real farms underpinned by land-use changes in space and time.
Methods: Here, we demonstrate how a new framework – WaterCan Profit – can be used to elicit such complexity using an irrigated case study farm with four whole farm agronomic scenarios (Baseline, Diversified, Intensified and Simplified) with four types of irrigated infrastructure (Gravity, Pipe & Riser, Pivot and Drip).
Findings:Without adaptation, we show that the climate crisis detrimentally impacted on farm profitability due the combination of increased evaporative demand and increased drought frequency. Whole farm intensification – via greater irrigated land use, incorporation of rice, cotton and maize and increased nitrogen fertilizer application – was the only adaptation capable of raising farm productivity under future climates. While Diversification through incorporation of grain legumes significantly improved profitability under historical climates, profitability of this adaptation declined under future climates. Simplified systems reduced economic risk but also had lower long-term economic returns.
Conclusions:We conclude with four key insights: (1) when assessing whole farm profit, metrics matter: Diversified systems generally had higher profitability than Intensified systems per unit water, but not per unit land area; (2) gravity-based irrigation infrastructure required the most water followed by sprinkler systems, while Drip irrigation used the least water, (3) whole farm agronomic adaptation through management and crop genotype had greater impact on productivity compared with changes in irrigation infrastructure, and (4) only whole farm intensification was able to raise profitability under future climates.
|Item Type:||Conference Extract|
|Keywords:||Climate crisis; irrigation; water; policy; sustainable intensification; grain; maize; rice; cotton; wheat; barley; phenology; decision-support; WaterCan Profit; Profitability; Infrastructure; engineering; allocation; sprinkler; drip; flood; crop|
|Research Division:||Agricultural, Veterinary and Food Sciences|
|Research Group:||Agriculture, land and farm management|
|Research Field:||Agricultural land planning|
|Objective Division:||Environmental Policy, Climate Change and Natural Hazards|
|Objective Group:||Adaptation to climate change|
|Objective Field:||Climate change adaptation measures (excl. ecosystem)|
|UTAS Author:||Muleke, A (Mr Albert Muleke)|
|UTAS Author:||Harrison, MT (Associate Professor Matthew Harrison)|
|UTAS Author:||Eisner, R (Dr Rowan Eisner)|
|UTAS Author:||Yanotti, M (Dr Maria Yanotti)|
|UTAS Author:||Liu, K (Dr Ke Liu)|
|Deposited By:||TIA - Research Institute|
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