Abstract
Rice is one of the most important food crops in China. The realization of continuously high yield has great significance in ensuring food security and society stability. Meanwhile, low nitrogen (N) use efficiency is a serious problem in rice production in China. The objective of this study was to investigate if a cultivation technique could coordinately increase both grain yield and N use efficiency in rice. Mid-season japonica rice cultivars were used with the treatments of local high-yielding cultivation (con-trol), super high-yielding cultivation, and high-yielding and high N use efficiency cultivation (HHC). The characteristics of grain yield formation under different cultivation systems and their physiological basis were analyzed. The results showed that, com-pared with the control, the HHC significantly increased biomass of root and shoot, root cytokinin concentration and root oxidation activity, grain-leaf ratio, leaf photosynthetic rate during the mid and late grain filling periods, nonstructural carbohydrate accumu-lation in stems and sheaths at the heading time, remobilization of carbon accumulated from heading to mature stage, and harvest index. The HHC increased grain yield by 31% and agronomic N use efficiency (increased grain yield per unit N application) by 57% when compared with the control. The results suggest that root and shoot growth could be improved and high grain yield and high N use efficiency could be achieved through integrating and optimizing cultivation techniques in rice production.
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Claims 11
Claim · model-written summary
HHC significantly increased root and shoot biomass.
- Taxon
- Rice
Oryza sativat0 - Treatment
- HHCe0
- Outcome
- biomass of root and shoote0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that, com-pared with the control, the HHC significantly increased biomass of root and shoot, root cytokinin concentration and root oxidation activity, grain-leaf ratio, leaf photosynthetic rate during the mid and late grain filling periods, nonstructural carbohydrate accumu-lation in stems and sheaths at the heading time, remobilization of carbon accumulated from heading to mature stage, and harvest index.”
t0“Mid-Season Japonica Rice”
Claim · model-written summary
HHC significantly increased root cytokinin concentration.
- Taxon
- RiceOryza sativat0
- Treatment
- HHCe0
- Outcome
- root cytokinin concentratione0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that, com-pared with the control, the HHC significantly increased biomass of root and shoot, root cytokinin concentration and root oxidation activity, grain-leaf ratio, leaf photosynthetic rate during the mid and late grain filling periods, nonstructural carbohydrate accumu-lation in stems and sheaths at the heading time, remobilization of carbon accumulated from heading to mature stage, and harvest index.”
t0“Mid-Season Japonica Rice”
Claim · model-written summary
HHC significantly increased root oxidation activity.
- Taxon
- RiceOryza sativat0
- Treatment
- HHCe0
- Outcome
- root oxidation activitye0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that, com-pared with the control, the HHC significantly increased biomass of root and shoot, root cytokinin concentration and root oxidation activity, grain-leaf ratio, leaf photosynthetic rate during the mid and late grain filling periods, nonstructural carbohydrate accumu-lation in stems and sheaths at the heading time, remobilization of carbon accumulated from heading to mature stage, and harvest index.”
t0“Mid-Season Japonica Rice”
Claim · model-written summary
HHC significantly increased grain-leaf ratio.
- Taxon
- RiceOryza sativat0
- Treatment
- HHCe0
- Outcome
- grain-leaf ratioe0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that, com-pared with the control, the HHC significantly increased biomass of root and shoot, root cytokinin concentration and root oxidation activity, grain-leaf ratio, leaf photosynthetic rate during the mid and late grain filling periods, nonstructural carbohydrate accumu-lation in stems and sheaths at the heading time, remobilization of carbon accumulated from heading to mature stage, and harvest index.”
t0“Mid-Season Japonica Rice”
Claim · model-written summary
HHC significantly increased leaf photosynthetic rate during mid and late grain filling.
- Taxon
- RiceOryza sativat0
- Treatment
- HHCe0
- Outcome
- leaf photosynthetic ratee0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that, com-pared with the control, the HHC significantly increased biomass of root and shoot, root cytokinin concentration and root oxidation activity, grain-leaf ratio, leaf photosynthetic rate during the mid and late grain filling periods, nonstructural carbohydrate accumu-lation in stems and sheaths at the heading time, remobilization of carbon accumulated from heading to mature stage, and harvest index.”
t0“Mid-Season Japonica Rice”
Claim · model-written summary
HHC significantly increased carbohydrate accumulation in stems and sheaths at heading.
- Taxon
- RiceOryza sativat0
- Treatment
- HHCe0
- Outcome
- nonstructural carbohydrate accumu-lation in stems and sheathse0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that, com-pared with the control, the HHC significantly increased biomass of root and shoot, root cytokinin concentration and root oxidation activity, grain-leaf ratio, leaf photosynthetic rate during the mid and late grain filling periods, nonstructural carbohydrate accumu-lation in stems and sheaths at the heading time, remobilization of carbon accumulated from heading to mature stage, and harvest index.”
t0“Mid-Season Japonica Rice”
Claim · model-written summary
HHC significantly increased remobilization of carbon accumulated from heading to maturity.
- Taxon
- RiceOryza sativat0
- Treatment
- HHCe0
- Outcome
- remobilization of carbon accumulated from heading to mature stagee0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that, com-pared with the control, the HHC significantly increased biomass of root and shoot, root cytokinin concentration and root oxidation activity, grain-leaf ratio, leaf photosynthetic rate during the mid and late grain filling periods, nonstructural carbohydrate accumu-lation in stems and sheaths at the heading time, remobilization of carbon accumulated from heading to mature stage, and harvest index.”
t0“Mid-Season Japonica Rice”
Claim · model-written summary
HHC significantly increased harvest index.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that, com-pared with the control, the HHC significantly increased biomass of root and shoot, root cytokinin concentration and root oxidation activity, grain-leaf ratio, leaf photosynthetic rate during the mid and late grain filling periods, nonstructural carbohydrate accumu-lation in stems and sheaths at the heading time, remobilization of carbon accumulated from heading to mature stage, and harvest index.”
t0“Mid-Season Japonica Rice”
Claim · model-written summary
HHC increased rice grain yield by 31% relative to control.
- Taxon
- RiceOryza sativat0
- Treatment
- HHCe0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 31%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The HHC increased grain yield by 31% and agronomic N use efficiency (increased grain yield per unit N application) by 57% when compared with the control.”
t0“Mid-Season Japonica Rice”
Claim · model-written summary
HHC increased agronomic nitrogen use efficiency by 57% relative to control.
- Taxon
- RiceOryza sativat0
- Treatment
- HHCe0
- Outcome
- agronomic N use efficiencye0
- Direction
- increasede0
- Value
- 57%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The HHC increased grain yield by 31% and agronomic N use efficiency (increased grain yield per unit N application) by 57% when compared with the control.”
t0“Mid-Season Japonica Rice”
Claim · model-written summary
The authors suggest integrating and optimizing cultivation techniques to improve rice growth, yield and nitrogen efficiency.
- Taxon
- riceOryza sativae0
- Outcome
- integrating and optimizing cultivation techniquese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results suggest that root and shoot growth could be improved and high grain yield and high N use efficiency could be achieved through integrating and optimizing cultivation techniques in rice production.”
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