Claim · model-written summary
Urea deep placement gave the highest total amount of leached nitrate in soybean grown in lysimeters.
- Taxon
- soybean
Glycine maxe0 - Treatment
- urea deep placemente1
- Outcome
- total amount of leached nitratee1
- Direction
- higheste1
- Comparator
- deep placement of Lime N or DMPP-Ue1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it promoted soybean growth and seed yield”
e1“The total amount of leached nitrate was the highest in urea deep placement, and it was reduced by the deep placement of Lime N or DMPP-U”
Title
Takuji Ohyama; Keisuke Ikebe; Sotaro Okuoka; et al. Crop and Environment 2022. doi:10.1016/j.crope.2022.09.002
Other claims from this paper (10)
- Intervention effect Deep placement of Lime N or DMPP-U reduced the total amount of leached nitrate compared with urea deep placement in soybean grown in lysimeters.
- Observation In 2020 the total amount of nitrate in the leachate during cultivation was 0.95, 1.83 and 2.78 g N m-2 in control, Lime N and urea plots.
- Intervention effect Seed yield was higher with Lime N (424) than with the control (267) in soybean.
- Intervention effect Seed yield was higher with urea deep placement (399) than with the control (267) in soybean.
- Intervention effect Total N accumulated in the shoots was higher with Lime N (32.1) than with the control (26.5) in soybean.
- Mechanism Soybean plants with Lime N might assimilate more N from fertilizer and from N2 fixation than control plants.
- Intervention effect In a soil incubation test, Lime N or DMPP-U retarded nitrification compared with urea.
- Intervention effect Deep placement of coated urea did not inhibit N fixation activity in soybean.
- Intervention effect Deep placement of coated urea promoted soybean growth and seed yield.
- Observation Nitrate was the principal N leachate, and most of it leached until the flowering stage in soybean.