Claim · model-written summary
Under high N, rice leaf N concentration did not increase further.
- Taxon
- Rice
Oryza sativae0 - Treatment
- high N inputs (360 kg N ha −1 )e1
- Outcome
- Rice leaf N concentration [N]e0
- Direction
- did not increase furthere0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice leaf N concentration [N] did not increase further, and N:P ratios even decreased, whereas E. crus-galli and M. korsakowii had significantly increased [N] and N-related stoichiometry.”
e1“The opposite trend was found for high N inputs (360 kg N ha −1 ).”
Title
Divergent responses of leaf N:P:K stoichiometry to nitrogen fertilization in rice and weeds
Xiao Sun; Jiuxin Guo; Shiwei Guo; et al. Weed Science 2019. doi:10.1017/wsc.2019.7
Other claims from this paper (17)
- Intervention effect Weed leaf stoichiometry was not sensitive to low (120 kg N ha −1 ) inputs.
- Intervention effect Weed leaf stoichiometry was not sensitive to regular (240 kg N ha −1 ) inputs.
- Intervention effect Low or regular N inputs significantly increased rice leaf N concentration.
- Intervention effect Low or regular N inputs significantly increased rice N:P.
- Intervention effect Low or regular N inputs significantly increased rice N:K ratios.
- Intervention effect Under high N, rice leaf N:P ratios decreased.
- Intervention effect E. crus-galli had significantly increased [N] under high N.
- Intervention effect E. crus-galli had significantly increased N-related stoichiometry under high N.
- Intervention effect M. korsakowii had significantly increased [N] under high N.
- Intervention effect M. korsakowii had significantly increased N-related stoichiometry under high N.
- Intervention effect Straw return dampened regular N effects on rice N:P.
- Intervention effect Straw return dampened regular N effects on rice N:K ratios.
- Intervention effect Straw return enhanced regular N effects on M. pumilus leaf N:P ratios.
- Observation Rice leaves had lower elemental concentrations than weed leaves at grain filling.
- Association The authors infer lower rice N requirements than weeds at grain filling.
- Recommendation The authors recommend relatively low N supply to limit weed nutrient acquisition and competition.
- Recommendation The authors recommend combining N management with straw return to control weeds and improve crop nutrient-use efficiency.