DOI: 10.1111/gcb.14822
论文题名: The fertilization effect of global dimming on crop yields is not attributed to an improved light interception
作者: Shao L. ; Li G. ; Zhao Q. ; Li Y. ; Sun Y. ; Wang W. ; Cai C. ; Chen W. ; Liu R. ; Luo W. ; Yin X. ; Lee X.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2020
卷: 26, 期: 3 语种: 英语
英文关键词: acclimation
; diffuse radiation
; fertilization effect
; global dimming
; radiation use efficiency
; rice
; wheat
; yield
Scopus关键词: acclimation
; crop production
; crop yield
; fertilization (reproduction)
; global change
; interception
; light use efficiency
; numerical model
; yield response
; Triticum aestivum
; acclimatization
; agroecosystem
; article
; canopy
; climate change
; controlled study
; experimental study
; fertilization
; harvest
; harvest index
; leaf nitrogen content
; light interception
; nonhuman
; photosynthesis
; radiation use efficiency
; rice
; wheat
英文摘要: Global dimming, a decadal decrease in incident global radiation, is often accompanied with an increase in the diffuse radiation fraction, and, therefore, the impact of global dimming on crop production is hard to predict. A popular approach to quantify this impact is the statistical analysis of historical climate and crop data, or use of dynamic crop simulation modelling approach. Here, we show that statistical analysis of historical data did not provide plausible values for the effect of diffuse radiation versus direct radiation on rice or wheat yield. In contrast, our field experimental study of 3 years demonstrated a fertilization effect of increased diffuse radiation fraction, which partly offset yield losses caused by decreased global radiation, in both crops. The fertilization effect was not attributed to any improved canopy light interception but mainly to the increased radiation use efficiency (RUE). The increased RUE was explained not only by the saturating shape of photosynthetic light response curves but also by plant acclimation to dimming that gradually increased leaf nitrogen concentration. Crop harvest index slightly decreased under dimming, thereby discounting the fertilization effect on crop yields. These results challenge existing modelling paradigms, which assume that the fertilization effect on crop yields is mainly attributed to an improved light interception. Further studies on the physiological mechanism of plant acclimation are required to better quantify the global dimming impact on agroecosystem productivity under future climate change. © 2019 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158772
Appears in Collections: 气候变化与战略
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作者单位: College of Agriculture, Nanjing Agricultural University, Nanjing, China; Centre for Crop Systems Analysis, Wageningen University & Research, Wageningen, Netherlands; CAM Henan Key Laboratory of Agrometeorological Support and Applied Technique, Zhengzhou, China; School of Forestry and Environmental Studies, Yale University, New Haven, CT, United States; Yale-NUIST Center on Atmospheric Environment, Nanjing University of Information Science & Technology, Nanjing, China
Recommended Citation:
Shao L.,Li G.,Zhao Q.,et al. The fertilization effect of global dimming on crop yields is not attributed to an improved light interception[J]. Global Change Biology,2020-01-01,26(3)