Claim · model-written summary
More chemical fertilizer did not improve soil organic C and N.
- Taxon
- cropt0
- Treatment
- chemical fertilizere0
- Outcome
- Soil organic C and N contente0
- Direction
- could not be improvede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Verbatim
e0“Soil organic C and N content could not be improved by application increase of chemical fertilizer”
t0“Soil Fertility and Crop Yield”
Title
Lin Zhian; Bingqiang Zhao; Liang Yuan; et al. 2009
Other claims from this paper (12)
- Intervention effect Chemical fertilizers outperformed organic manure for winter wheat yield in the first 8–10 years.
- Intervention effect Organic manure outperformed chemical fertilizers for summer maize yield in the initial period.
- Intervention effect Combined chemical fertilizer and manure had a marked effect on wheat yield.
- Intervention effect Combined chemical fertilizer and manure had a marked effect on maize yield.
- Observation Yields across treatments became similar with prolonged application.
- Association Soil organic matter increased over time and with manure application level.
- Association Soil organic matter and total nitrogen were unrelated to chemical fertilizer rate.
- Intervention effect Higher chemical fertilizer application increased available soil nutrients.
- Intervention effect Increasing fertilizer application did not improve crop yield.
- Intervention effect Organic manure increased soil organic C and N more than chemical fertilizer.
- Association Soil organic C and N increased with organic manure rate.
- Intervention effect Over prolonged use, manure improved available soil nutrients more than chemical fertilizer.