Claim · model-written summary
Increasing nitrogen rate significantly decreased agronomic nitrogen use efficiency and partial factor productivity under both systems.
- Taxon
- RICE
Oryza sativat0 - Treatment
- N ratee0
- Outcome
- ANUE and PFPe0
- Direction
- decreasede0
- Qualifier
- under both SRI and TFe0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As N rate increased, the ANUE and PFP under both SRI and TF significantly decreased.”
t0“SYSTEM OF RICE INTENSIFICATION”
Title
LIMEI ZHAO; LIANGHUAN WU; YONGSHAN LI; et al. Experimental Agriculture 2009. doi:10.1017/s0014479709007583
Other claims from this paper (14)
- Observation SRI rice grain yields ranged from 5.6 to 7.3 t ha −1.
- Intervention effect SRI grain yield averaged 21% higher than traditional flooding in 2005.
- Intervention effect SRI grain yield averaged 22% higher than traditional flooding in 2006.
- Intervention effect SRI had higher harvest index than traditional flooding across four nitrogen rates in both years.
- Intervention effect Above-ground biomass did not differ significantly between cultivation systems in either year.
- Intervention effect At 80 kg N ha −1, SRI significantly increased agronomic nitrogen use efficiency over traditional flooding.
- Intervention effect At higher nitrogen rates, SRI agronomic nitrogen use efficiency was significantly lower than traditional flooding.
- Intervention effect SRI partial factor productivity exceeded traditional flooding across nitrogen rates, except that the difference at 240 kg N ha −1 was not significant.
- Intervention effect SRI reduced irrigation water use by 40% in 2005 relative to traditional flooding.
- Intervention effect SRI reduced irrigation water use by 47% in 2006 relative to traditional flooding.
- Intervention effect SRI significantly increased total and irrigation water use efficiency over traditional flooding.
- Association The highest nitrogen rate was associated with lower grain yield, nitrogen use efficiency, and water use efficiency in both systems.
- Observation Cultivation system, nitrogen rates, and their interaction yielded significant differences.
- Recommendation The authors recommend optimizing fertilizer nitrogen rates under SRI to increase yield and nitrogen and water use efficiency.