TY - EJOU
AU - Yin, Xiaohong
AU - Tao, Zui
AU - Chen, Jiana
AU - Cao, Fangbo
AU - Huang, Min
AU - Zou, Yingbin
TI - Biochar Application Enhanced Post-Heading Radiation Use Efficiency in Field-Grown Rice (Oryza sativa L.)
T2 - Phyton-International Journal of Experimental Botany
PY - 2020
VL - 89
IS - 2
SN - 1851-5657
AB - It has been shown that adding biochar to soil can improve nitrogen (N)
uptake and utilization in rice (Oryza sativa L.). However, there is a lack of
research on the physiological alterations of rice as a result of the changes in nitrogen uptake due to the addition of biochar. This study conducted field experiments
in 2015 and 2016 with the goal of testing the hypothesis that the application of
biochar would enhance radiation use efficiency (RUE) of rice by improving the
plant’s ability to take in and utilize nitrogen. Our results demonstrated that the
application of biochar (20 t ha−1
) induced no significant effects on pre-heading
specific leaf weight (SLW), nitrogen uptake (NUpre), and leaf area index (LAI)
at heading, the ratios of LAI/NUpre and SLW/Nupre, or pre-heading RUE. However, biochar application significantly increased post-heading nitrogen uptake
(NUpost), ratios of NUpost/SLW and NUpost/LAI, and post-heading RUE. These
results indicate that the application of biochar can improve the plant’s nitrogen
uptake and RUE in field-grown rice during the post-heading period, which con-
firms our hypothesis.
KW - Biochar; nitrogen uptake; radiation use efficiency; rice
DO - 10.32604/phyton.2020.08962