Claim · model-written summary
Periodic waterlogging caused large nitrogen losses through denitrification in the Taihu region.
- Taxon
- rice/upland wheate1
- Treatment
- Periodic waterlogging of upland systemse0
- Outcome
- N losses by denitrificatione0
- Direction
- largee0
- Setting
- Taihu regione0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorValueQualifier
Verbatim
e0“Periodic waterlogging of upland systems caused large N losses by denitrification in the Taihu region”
e1“waterlogged rice/upland wheat in the Taihu region of east China”
Title
Reducing environmental risk by improving N management in intensive Chinese agricultural systems
Xiao-Tang Ju; Guang-Xi Xing; Xin-Ping Chen; et al. Proceedings of the National Academy of Sciences 2009. doi:10.1073/pnas.0813417106
Other claims from this paper (8)
- Intervention effect Current high nitrogen practices do not significantly raise crop yields relative to optimum fertilization.
- Intervention effect Current high nitrogen practices cause about twice the environmental nitrogen losses of optimum fertilization.
- Observation Residual nitrogen was little used by succeeding crops in rice/wheat systems compared with wheat/maize systems.
- Observation Ammonia volatilization was a main nitrogen loss pathway for wheat at 19%.
- Observation Ammonia volatilization was a main nitrogen loss pathway for maize at 24%.
- Observation Nitrate leaching was a main nitrogen loss pathway in the wheat/maize system.
- Observation Atmospheric deposition and irrigation water nitrogen increased more than twofold and became important nitrogen sources to agricultural ecosystems.
- Recommendation The authors recommend optimum nitrogen fertilization, control of loss pathways, and extension-service improvements to improve nitrogen balance without sacrificing yields.