Claim · model-written summary
Above 240 kg·hm-2 N, accumulated soil NO3--N had a high leaching risk.
Zea maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that the yield of spring maize increased significantly with N application rate increasing”
e2“once the rate exceeded 240 kg·hm-2, accumulated NO3--N in soil layer had high leaching risk”
Title
Juan Ying-hu Nongye ziyuan yu huanjing xuebao 2014
Other claims from this paper (11)
- Intervention effect Spring maize yield increased significantly with increasing N application rate.
- Intervention effect Above 180 kg·hm-2 N, spring maize yield stayed stable or tended to decline.
- Intervention effect N agronomic use efficiency, N uptake efficiency and N partial productivity decreased significantly with increasing N rate.
- Intervention effect N harvest index decreased significantly with increasing N rate.
- Intervention effect N apparent use efficiency and N physiological use efficiency first increased and then decreased with N rate.
- Observation Soil NO3--N content in 0~60 cm showed an increase-decrease-increase-decrease trend, then stabilised, over the season of spring maize.
- Observation Under N treatment, soil NO3--N content in 60~120 cm showed a trend of increase at the late growing stage.
- Observation Soil NO3--N content decreased in a wave manner with increasing soil depth.
- Intervention effect At 240 and 300 kg·hm-2 N, soil NO3--N content in 60~100 cm was significantly higher than under other N rates.
- Intervention effect NO3--N accumulation in 0~120 cm soil layer increased significantly with increasing N rate.
- Recommendation 179 to 209 kg N·hm-2 is the reasonable N application rate for spring maize under the experimental conditions.