Claim · model-written summary
N loss to input ratios were approximately 60% under N.
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionQualifier
Verbatim
e0“Nitrogen loss/input ratios were ∼60, ∼40 or ∼30% under N, NP or NPK at three sites”
e1“The rice-wheat rotation's NAE was 3.3 kg kg−1 higher under NPK than under NP at Chongqing”
Title
Ying-hua DUAN; Xiao-jun SHI; Shuang-lai LI; et al. Journal of Integrative Agriculture 2014. doi:10.1016/s2095-3119(13)60716-9
Other claims from this paper (17)
- Intervention effect NP increased rice yield by 9.3–81.6% relative to N alone.
- Intervention effect NP increased wheat yield by 54.5–93.8% relative to N alone.
- Intervention effect NPK raised rice yield by 1.7–9.8% relative to NP.
- Intervention effect NPK raised wheat yield by 0–17.6% relative to NP.
- Intervention effect NPK increased wheat NUE by 9.3% relative to NP at Chongqing.
- Intervention effect NPK increased wheat NUE by 11.8% relative to NP at Wuchang.
- Intervention effect Wheat NUE did not significantly increase with NPK at Suining.
- Intervention effect Rice NUE did not change between NP and NPK at the three sites.
- Intervention effect Rotation NAE was 3.3 kg kg−1 higher under NPK than NP at Chongqing.
- Intervention effect Rotation NAE was similar under NPK and NP at Suining and Wuchang.
- Association Estimated additional N uptake of 1.0 kg N ha−1 corresponded to 40 kg additional rice yield.
- Association Estimated additional N uptake of 1.0 kg N ha−1 corresponded to 30 kg additional wheat yield.
- Observation N loss to input ratios were approximately 40% under NP.
- Observation N loss to input ratios were approximately 30% under NPK.
- Intervention effect NPK increased soil N accumulation by 25–55 kg ha−1 yr−1 across three sites.
- Intervention effect NP increased soil N accumulation by 35 kg ha−1 yr−1 at Chongqing only.
- Recommendation The authors recommend P and K for wheat and less K for rice to improve NUE and reduce N loss.