Spatio-temporal distribution of sugarcane potential yields and yield gaps in Southern China

Zu, Q; Mi, C; Liu, DL; He, L; Kuang, Z; Fang, Q; Ramp, D; Li, L; Wang, B; Chen, Y; Li, J; Jin, N; Yu, Q

Spatio-temporal distribution of sugarcane potential yields and yield gaps in Southern China

Zu, Q Mi, C Liu, DL He, L Kuang, Z Fang, Q Ramp, D

Li, L Wang, B Chen, Y Li, J Jin, N Yu, Q

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Publication Type:: Journal Article
Citation:: European Journal of Agronomy, 2018, 92 pp. 72 - 83
Issue Date:: 2018-01-01

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Field	Value	Language
dc.contributor.author	Zu, Q	en_US
dc.contributor.author	Mi, C	en_US
dc.contributor.author	Liu, DL	en_US
dc.contributor.author	He, L	en_US
dc.contributor.author	Kuang, Z	en_US
dc.contributor.author	Fang, Q	en_US
dc.contributor.author	Ramp, D https://orcid.org/0000-0003-3202-9898	en_US
dc.contributor.author	Li, L	en_US
dc.contributor.author	Wang, B	en_US
dc.contributor.author	Chen, Y	en_US
dc.contributor.author	Li, J	en_US
dc.contributor.author	Jin, N	en_US
dc.contributor.author	Yu, Q https://orcid.org/0000-0001-6950-1821	en_US
dc.date.issued	2018-01-01	en_US
dc.identifier.citation	European Journal of Agronomy, 2018, 92 pp. 72 - 83	en_US
dc.identifier.issn	1161-0301	en_US
dc.identifier.uri	http://hdl.handle.net/10453/131012
dc.description.abstract	© 2017 Elsevier B.V. The sustainability and production capacity of sugarcane (Saccharum officinarum (L.)) in Southern China is essential to ensure sugar security in China, yet potential crop yield and yield gap (the difference between actual and potential crop yield) of sugarcane is poorly known. In this study, the sugarcane growth and development model, QCANE, was validated for sugarcane phenology, stalk height, and yields, then used to simulate potential yields and yield gaps of sugarcane in Southern Chine (SC) between 1970 and 2014. Simulated potential yields decreased as longitude and latitude increased, driven by spatial variation in solar radiation and maximum temperature. The gap between potential and water-limited yields was noticeably larger in Yunnan province because of the prevalence of seasonal water deficiency. However, nitrogen stress was the dominant driver of the yield gap, given the abundant precipitation in SC. Across SC, large variation in the yield gap between water-and-nitrogen limited yields and on-farm yields was observed for different counties, a difference that was usually larger than the local yield gap. Averaged across SC, on-farm sugarcane yields were only 27% of potential yields, 31% of water-limited yields, and 52% of nitrogen-limited yields. This result highlights considerable potential to significantly increase sugarcane production by improving varieties, government support, effective management measures such as fertilization, irrigation, and mechanization.	en_US
dc.relation.ispartof	European Journal of Agronomy	en_US
dc.relation.isbasedon	10.1016/j.eja.2017.10.005	en_US
dc.subject.classification	Agronomy & Agriculture	en_US
dc.title	Spatio-temporal distribution of sugarcane potential yields and yield gaps in Southern China	en_US
dc.type	Journal Article
utslib.citation.volume	92	en_US
utslib.for	0703 Crop and Pasture Production	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	92	en_US

Abstract:

© 2017 Elsevier B.V. The sustainability and production capacity of sugarcane (Saccharum officinarum (L.)) in Southern China is essential to ensure sugar security in China, yet potential crop yield and yield gap (the difference between actual and potential crop yield) of sugarcane is poorly known. In this study, the sugarcane growth and development model, QCANE, was validated for sugarcane phenology, stalk height, and yields, then used to simulate potential yields and yield gaps of sugarcane in Southern Chine (SC) between 1970 and 2014. Simulated potential yields decreased as longitude and latitude increased, driven by spatial variation in solar radiation and maximum temperature. The gap between potential and water-limited yields was noticeably larger in Yunnan province because of the prevalence of seasonal water deficiency. However, nitrogen stress was the dominant driver of the yield gap, given the abundant precipitation in SC. Across SC, large variation in the yield gap between water-and-nitrogen limited yields and on-farm yields was observed for different counties, a difference that was usually larger than the local yield gap. Averaged across SC, on-farm sugarcane yields were only 27% of potential yields, 31% of water-limited yields, and 52% of nitrogen-limited yields. This result highlights considerable potential to significantly increase sugarcane production by improving varieties, government support, effective management measures such as fertilization, irrigation, and mechanization.

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http://hdl.handle.net/10453/131012