TY  - JOUR
AU  - Sun, Zhaoan
AU  - Chen, Qing
AU  - Han, Xiao
AU  - Bol, Roland
AU  - Qu, Bo
AU  - Meng, Fanqiao
TI  - Allocation of photosynthesized carbon in an intensively farmed winter wheat–soil system as revealed by 14CO2 pulse labelling
JO  - Scientific reports
VL  - 8
IS  - 1
SN  - 2045-2322
CY  - London
PB  - Nature Publishing Group
M1  - FZJ-2018-02002
SP  - 3160
PY  - 2018
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - pmid:29453440
UR  - <Go to ISI:>//WOS:000425284900028
DO  - DOI:10.1038/s41598-018-21547-y
UR  - https://juser.fz-juelich.de/record/844598
ER  -