Claim · model-written summary
Maize yields did not increase where NP was applied.
Zea maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Wheat yields increased significantly (by 86 to 155 kg ha−1 yr−1) in treatments where NP was applied, but maize yields did not”
Title
Trends of Yield and Soil Fertility in a Long-Term Wheat-Maize System
Xue-yun YANG; Ben-hua SUN; Shu-lan ZHANG Journal of Integrative Agriculture 2014. doi:10.1016/s2095-3119(13)60425-6
Other claims from this paper (15)
- Intervention effect Mean wheat yield was higher under M2NPK than under the unfertilised control CK.
- Intervention effect Mean maize yield was higher under M2NPK than under the control CK.
- Intervention effect Omitting either N or P gave significantly lower crop yields than applying both.
- Observation Crop yields under NP, NPK and SNPK treatments were statistically identical.
- Observation Crop yields under SNPK and MNPK were statistically identical.
- Intervention effect M2NPK gave a significantly higher wheat yield than NP.
- Intervention effect MNPK gave a significantly higher maize yield than both NP and NPK.
- Intervention effect Wheat yields increased significantly by 86 to 155 kg ha−1 yr−1 where NP was applied.
- Intervention effect Nitrogen use efficiency of wheat was highest under the NP and NPK treatments.
- Intervention effect Nitrogen use efficiency of maize was highest under MNPK treatment.
- Intervention effect The P balance increased by 136 to 213 kg ha−1 annually under MNPK treatment.
- Observation The K balance was negative in most treatments, ranging from 31 to 217 kg ha−1 yr−1.
- Observation Soil available K levels remained unchanged or increased over 20 years.
- Observation SOM levels increased significantly in all treatments.
- Recommendation The authors suggest that combining manure with inorganic N, or returning straw with NP, is likely to improve soil fertility in the wheat-maize system.