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000844598 1001_ $$0P:(DE-HGF)0$$aSun, Zhaoan$$b0
000844598 245__ $$aAllocation of photosynthesized carbon in an intensively farmed winter wheat–soil system as revealed by 14CO2 pulse labelling
000844598 260__ $$aLondon$$bNature Publishing Group$$c2018
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000844598 520__ $$aUnderstanding the rhizodeposited carbon (C) dynamics of winter wheat (Triticum aestivum L.), is crucial for soil fertility and C sequestration. Pot-grown winter wheat was pulse labelled with 14CO2 at the key growth stages. 14C in the shoots, roots and soil was measured at 5 or 2 days after 14C-labelling (DAL 5/2) at each growth stage and at harvest. The 14C in the shoots increased from 4% of the net 14C recovered (shoots + roots + soil) during tillering to 53% at harvest. Approximately 14–34% of the net 14C recovered was incorporated into the soil. Allocation of photosynthesized C was extrapolated from the pot experiment to field condition, assuming a planting density of 1.8 million plants ha−1. The estimated C input to the soil was 1.7 t C ha−1, and 0.7 t C ha−1 of root residues was retained after wheat harvest; both values were higher than those previously reported (0.6 and 0.4 t C ha−1, respectively). Our findings highlight that C tracing during the entire crop season is necessary to quantify the temporal allocation of photosynthesized C, especially the contribution to soil carbon in intensified farming system.
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000844598 7001_ $$0P:(DE-HGF)0$$aChen, Qing$$b1
000844598 7001_ $$0P:(DE-HGF)0$$aHan, Xiao$$b2
000844598 7001_ $$0P:(DE-Juel1)145865$$aBol, Roland$$b3
000844598 7001_ $$0P:(DE-HGF)0$$aQu, Bo$$b4
000844598 7001_ $$00000-0002-0172-7776$$aMeng, Fanqiao$$b5$$eCorresponding author
000844598 773__ $$0PERI:(DE-600)2615211-3$$a10.1038/s41598-018-21547-y$$gVol. 8, no. 1, p. 3160$$n1$$p3160$$tScientific reports$$v8$$x2045-2322$$y2018
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