Abstract
Abstract We investigated whether the one-time application of polymer-coated urea (PCU) before transplanting could simultaneously improve the grain yield and nitrogen use efficiency (NUE) of japonica-indica hybrid rice (JIHR) through a field experiment. The local high-yield JIHR cultivar Chunyou-927 was field grown during the rice-growing seasons in 2019 and 2020. The experiment consisted of three treatments: no nitrogen application (0N), application of conventional urea (CU), and the one-time application of PCU. Grain yield was 1.0–1.3 t/ha higher, and agronomic NUE (kg grain yield increase per kg N applied) was 5.2–5.9 kg/kg higher, respectively, under the PCU treatment compared with the CU treatment across the two study years. When compared with the CU treatment, the PCU treatment could (1) improve root morphological trait, (2) reduce redundant vegetative growth during the early growth period, (3) increase matter production during the mid and late growth period, and (4) increase plant activity during the grain-filling period. Overall, our findings indicate that one-time PCU application before transplanting of the JIHR cultivar holds great promise for increasing grain yield and NUE.
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Claims 6
Claim · model-written summary
Polymer coated urea increased rice grain yield by 1.0–1.3 t/ha relative to conventional urea.
- Taxon
- rice
Oryza sativat0 - Treatment
- PCU treatmente0
- Outcome
- Grain yielde0
- Direction
- highere0
- Value
- 1.0–1.3 t/hae0
- Comparator
- CU treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield was 1.0–1.3 t/ha higher, and agronomic NUE (kg grain yield increase per kg N applied) was 5.2–5.9 kg/kg higher, respectively, under the PCU treatment compared with the CU treatment across the two study years”
t0“Polymer-coated urea application can increase both grain yield and nitrogen use efficiency injaponica-indicahybrid rice”
Claim · model-written summary
Polymer coated urea increased agronomic nitrogen use efficiency by 5.2–5.9 kg/kg.
- Taxon
- riceOryza sativat0
- Treatment
- PCU treatmente0
- Outcome
- agronomic NUEe0
- Direction
- highere0
- Value
- 5.2–5.9 kg/kge0
- Comparator
- CU treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“agronomic NUE (kg grain yield increase per kg N applied) was 5.2–5.9 kg/kg higher, respectively, under the PCU treatment compared with the CU treatment across the two study years”
t0“Polymer-coated urea application can increase both grain yield and nitrogen use efficiency injaponica-indicahybrid rice”
Claim · model-written summary
Polymer coated urea improved root morphology.
- Taxon
- riceOryza sativat0
- Treatment
- PCU treatmente0
- Outcome
- root morphological traite0
- Direction
- improvee0
- Comparator
- CU treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When compared with the CU treatment, the PCU treatment could (1) improve root morphological trait”
t0“Polymer-coated urea application can increase both grain yield and nitrogen use efficiency injaponica-indicahybrid rice”
Claim · model-written summary
Polymer coated urea reduced redundant early vegetative growth.
- Taxon
- riceOryza sativat0
- Organ / stage
- early growth periode0
- Treatment
- PCU treatmente0
- Outcome
- redundant vegetative growthe0
- Direction
- reducee0
- Comparator
- CU treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When compared with the CU treatment, the PCU treatment could (1) improve root morphological trait, (2) reduce redundant vegetative growth during the early growth period”
t0“Polymer-coated urea application can increase both grain yield and nitrogen use efficiency injaponica-indicahybrid rice”
Claim · model-written summary
Polymer coated urea increased mid and late period matter production.
- Taxon
- riceOryza sativat0
- Organ / stage
- mid and late growth periode0
- Treatment
- PCU treatmente0
- Outcome
- matter productione0
- Direction
- increasee0
- Comparator
- CU treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When compared with the CU treatment, the PCU treatment could (1) improve root morphological trait, (2) reduce redundant vegetative growth during the early growth period, (3) increase matter production during the mid and late growth period”
t0“Polymer-coated urea application can increase both grain yield and nitrogen use efficiency injaponica-indicahybrid rice”
Claim · model-written summary
Polymer coated urea increased plant activity during grain filling.
- Taxon
- riceOryza sativat0
- Organ / stage
- grain-filling periode0
- Treatment
- PCU treatmente0
- Outcome
- plant activitye0
- Direction
- increasee0
- Comparator
- CU treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When compared with the CU treatment, the PCU treatment could (1) improve root morphological trait, (2) reduce redundant vegetative growth during the early growth period, (3) increase matter production during the mid and late growth period, and (4) increase plant activity during the grain-filling period”
t0“Polymer-coated urea application can increase both grain yield and nitrogen use efficiency injaponica-indicahybrid rice”
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See all 2,045 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.