Newer and select maize, wheat, and rice varieties can help mitigate N footprint while producing more grain

© 2019 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 25(2019), 12 vom: 22. Dez., Seite 4273-4281
1. Verfasser: Ying, Hao (VerfasserIn)
Weitere Verfasser: Yin, Yulong, Zheng, Huifang, Wang, Yingcheng, Zhang, Qingsong, Xue, Yanfang, Stefanovski, Darko, Cui, Zhenling, Dou, Zhengxia
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article agronomic and morphological traits grain yield newer varieties reactive N losses sustainability Nitrogen N762921K75
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520 |a Sustainably feeding the growing population amid a changing climate and dwindling resources is a grand challenge facing mankind. Decades-long advancement in crop breeding has progressively elevated yield potential, markedly enhancing global food production capacity. However, relevant impact on reactive N (Nr) emissions associated with crop variety improvement has not been explicitly described. Here, we report multitiered evidence that newer and select maize, wheat, and rice varieties developed in China have the capacity to substantially lower Nr losses while producing more grain. First, we pooled studies featuring side-by-side comparison of different varieties, totaling 269 paired observations, to demonstrate that collectively, relatively newer varieties of maize, wheat, and rice had less Nr emissions (9.6%-23.5%) while yielding more grains (7.3%-11.2%) compared to older varieties under wide-ranging conditions. Next, we built an extended database (142 field studies with 833 observations) and comprehensively evaluated the Nr-loss reduction potential of newer varieties (2000 and after) versus older ones (1985-1999). We found that newer varieties had Nr emission factors (N loss as a percentage of N applied after correcting for background emissions) 18.2%-75.7% less for N2 O, 18.3%-75.7% less for NO 3 - , and -8.5% to 22.8% less for NH3 , while producing more grains (16.0%-24.4%). Individual varieties differed markedly in yield-emission scores. A nationwide farmer survey (2.47 million responses) indicated tremendous opportunities for a new way of management intervention. Coupling variety selection with sound N and other agronomic management can help lower N footprint while producing more grain 
650 4 |a Journal Article 
650 4 |a agronomic and morphological traits 
650 4 |a grain yield 
650 4 |a newer varieties 
650 4 |a reactive N losses 
650 4 |a sustainability 
650 7 |a Nitrogen  |2 NLM 
650 7 |a N762921K75  |2 NLM 
700 1 |a Yin, Yulong  |e verfasserin  |4 aut 
700 1 |a Zheng, Huifang  |e verfasserin  |4 aut 
700 1 |a Wang, Yingcheng  |e verfasserin  |4 aut 
700 1 |a Zhang, Qingsong  |e verfasserin  |4 aut 
700 1 |a Xue, Yanfang  |e verfasserin  |4 aut 
700 1 |a Stefanovski, Darko  |e verfasserin  |4 aut 
700 1 |a Cui, Zhenling  |e verfasserin  |4 aut 
700 1 |a Dou, Zhengxia  |e verfasserin  |4 aut 
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773 1 8 |g volume:25  |g year:2019  |g number:12  |g day:22  |g month:12  |g pages:4273-4281 
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