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| 005 | 20210129233008.0 | ||
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| 245 | _ | _ | |a Allocation of photosynthesized carbon in an intensively farmed winter wheat–soil system as revealed by 14CO2 pulse labelling |
| 260 | _ | _ | |a London |c 2018 |b Nature Publishing Group |
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| 520 | _ | _ | |a Understanding 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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| 700 | 1 | _ | |a Qu, Bo |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Meng, Fanqiao |0 0000-0002-0172-7776 |b 5 |e Corresponding author |
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