Abstract
Enhancing nitrogen use efficiency (NUE) in agricultural production can reduce fertilizer input, mitigate greenhouse gas emissions and decrease water pollution incidence. However, improving NUE in farming systems without compromising food security remains challenging. Herein, we have successfully developed and applied selenium-based nanotechnology, which capitalizes on above- and belowground synergies to enhance field-scale NUE. Specifically, when N fertilizer application was reduced by 30%, foliar application of selenium nanomaterials significantly enhanced rice photosynthesis by 40.3% compared with reduced N fertilizer treatment (189 kg N/ha). This enhancement promoted carbohydrate synthesis and translocation, providing abundant carbon sources for rhizosphere processes. These abundant carbon sources modulated rhizosphere N transformation processes, stimulating ammonification and nitrification while suppressing denitrification, thereby reducing methane, ammonia, and nitrous oxide emissions by 18.8 to 45.6%. In addition, compared with controls (270 kg N/ha), our approach improved rice root growth and upregulated gene expression associated with N uptake and translocation, increasing rice NUE (48.3%). While maintaining comparable yields to conventional practice, we observed significant improvements in rice quality parameters including crude protein, amino acids, and Se content. Furthermore, the application of this above- and belowground synergistic nano-regulation technology reduced environmental negative impacts by 41.0% and increased economic benefits by 38.2% per ton of rice produced, relative to conventional practices. This work elucidates how nano-enabled agricultural regulation achieves reduced input, enhanced efficiency, and increased income, emphasizing the high potential of nanotechnology in agricultural applications, particularly in improving the utilization efficiency of N fertilizers.
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Claims 13
Claim · model-written summary
Foliar selenium nanomaterials under 30% reduced N fertilizer significantly enhanced rice photosynthesis by 40.3% compared with the reduced N fertilizer treatment (189 kg N/ha).
- Taxon
- rice
Oryza sativae1 - Treatment
- foliar application of selenium nanomaterialse1
- Outcome
- photosynthesise1
- Direction
- enhancede1
- Value
- 40.3%e1
- Qualifier
- when N fertilizer application was reduced by 30%e1
- Comparator
- reduced N fertilizer treatment (189 kg N/ha)e1
- Setting
- field-scalee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we have successfully developed and applied selenium-based nanotechnology, which capitalizes on above- and belowground synergies to enhance field-scale NUE”
e1“when N fertilizer application was reduced by 30%, foliar application of selenium nanomaterials significantly enhanced rice photosynthesis by 40.3% compared with reduced N fertilizer treatment (189 kg N/ha)”
Claim · model-written summary
Enhanced photosynthesis promoted carbohydrate synthesis and translocation in rice.
- Taxon
- riceOryza sativae1
- Outcome
- carbohydrate synthesis and translocatione2
- Qualifier
- This enhancemente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“when N fertilizer application was reduced by 30%, foliar application of selenium nanomaterials significantly enhanced rice photosynthesis by 40.3% compared with reduced N fertilizer treatment (189 kg N/ha)”
e2“This enhancement promoted carbohydrate synthesis and translocation, providing abundant carbon sources for rhizosphere processes”
Claim · model-written summary
Carbon sources from enhanced photosynthesis stimulated ammonification and nitrification in the rhizosphere of rice.
- Taxon
- riceOryza sativae1
- Organ / stage
- rhizospheree3
- Outcome
- ammonification and nitrificatione3
- Direction
- stimulatinge3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“when N fertilizer application was reduced by 30%, foliar application of selenium nanomaterials significantly enhanced rice photosynthesis by 40.3% compared with reduced N fertilizer treatment (189 kg N/ha)”
e3“These abundant carbon sources modulated rhizosphere N transformation processes, stimulating ammonification and nitrification while suppressing denitrification”
Claim · model-written summary
Carbon sources from enhanced photosynthesis suppressed denitrification in the rhizosphere of rice.
- Taxon
- riceOryza sativae1
- Organ / stage
- rhizospheree3
- Outcome
- denitrificatione3
- Direction
- suppressinge3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“when N fertilizer application was reduced by 30%, foliar application of selenium nanomaterials significantly enhanced rice photosynthesis by 40.3% compared with reduced N fertilizer treatment (189 kg N/ha)”
e3“These abundant carbon sources modulated rhizosphere N transformation processes, stimulating ammonification and nitrification while suppressing denitrification”
Claim · model-written summary
Selenium-based nanotechnology reduced methane, ammonia and nitrous oxide emissions by 18.8 to 45.6% in rice.
- Taxon
- riceOryza sativae1
- Treatment
- selenium-based nanotechnologye0
- Outcome
- methane, ammonia, and nitrous oxide emissionse4
- Direction
- reducinge4
- Value
- 18.8 to 45.6%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we have successfully developed and applied selenium-based nanotechnology, which capitalizes on above- and belowground synergies to enhance field-scale NUE”
e1“when N fertilizer application was reduced by 30%, foliar application of selenium nanomaterials significantly enhanced rice photosynthesis by 40.3% compared with reduced N fertilizer treatment (189 kg N/ha)”
e4“thereby reducing methane, ammonia, and nitrous oxide emissions by 18.8 to 45.6%”
Claim · model-written summary
Compared with controls (270 kg N/ha), the selenium-based approach improved rice root growth.
- Taxon
- riceOryza sativae5
- Treatment
- our approache5
- Outcome
- root growthe5
- Direction
- improvede5
- Comparator
- controls (270 kg N/ha)e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“compared with controls (270 kg N/ha), our approach improved rice root growth and upregulated gene expression associated with N uptake and translocation, increasing rice NUE (48.3%)”
Claim · model-written summary
Compared with controls (270 kg N/ha), the selenium-based approach upregulated rice gene expression associated with N uptake and translocation.
- Taxon
- riceOryza sativae5
- Treatment
- our approache5
- Outcome
- gene expression associated with N uptake and translocatione5
- Direction
- upregulatede5
- Comparator
- controls (270 kg N/ha)e5
Not reportedGene
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“compared with controls (270 kg N/ha), our approach improved rice root growth and upregulated gene expression associated with N uptake and translocation, increasing rice NUE (48.3%)”
Claim · model-written summary
Compared with controls (270 kg N/ha), the selenium-based approach increased rice NUE by 48.3%.
- Taxon
- riceOryza sativae5
- Treatment
- our approache5
- Outcome
- NUEe5
- Direction
- increasinge5
- Value
- 48.3%e5
- Comparator
- controls (270 kg N/ha)e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“compared with controls (270 kg N/ha), our approach improved rice root growth and upregulated gene expression associated with N uptake and translocation, increasing rice NUE (48.3%)”
Claim · model-written summary
The selenium-based nano-regulation technology maintained rice yields comparable to conventional practice.
- Taxon
- riceOryza sativae1
- Treatment
- above- and belowground synergistic nano-regulation technologye6
- Outcome
- yieldse2
- Direction
- no_changeinferrede2
- Comparator
- conventional practicee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“when N fertilizer application was reduced by 30%, foliar application of selenium nanomaterials significantly enhanced rice photosynthesis by 40.3% compared with reduced N fertilizer treatment (189 kg N/ha)”
e6“the application of this above- and belowground synergistic nano-regulation technology”
e2“While maintaining comparable yields to conventional practice”
Claim · model-written summary
The selenium-based nano-regulation technology significantly improved rice quality parameters, including crude protein, amino acids and Se content.
- Taxon
- riceOryza sativae2
- Treatment
- above- and belowground synergistic nano-regulation technologye6
- Outcome
- rice quality parameters including crude protein, amino acids, and Se contente2
- Direction
- improvementse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“the application of this above- and belowground synergistic nano-regulation technology”
e2“we observed significant improvements in rice quality parameters including crude protein, amino acids, and Se content”
Claim · model-written summary
The selenium-based nano-regulation technology reduced environmental negative impacts by 41.0% per ton of rice produced relative to conventional practices.
- Taxon
- riceOryza sativae7
- Treatment
- above- and belowground synergistic nano-regulation technologye5
- Outcome
- environmental negative impactse5
- Direction
- reducede5
- Value
- 41.0%e5
- Qualifier
- per ton of rice producede7
- Comparator
- conventional practicese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“the application of this above- and belowground synergistic nano-regulation technology reduced environmental negative impacts by 41.0%”
e7“per ton of rice produced, relative to conventional practices”
Claim · model-written summary
The selenium-based nano-regulation technology increased economic benefits by 38.2% per ton of rice produced relative to conventional practices.
- Taxon
- riceOryza sativae7
- Treatment
- above- and belowground synergistic nano-regulation technologye5
- Outcome
- economic benefitse6
- Direction
- increasede6
- Value
- 38.2%e6
- Qualifier
- per ton of rice producede7
- Comparator
- conventional practicese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“the application of this above- and belowground synergistic nano-regulation technology reduced environmental negative impacts by 41.0%”
e6“increased economic benefits by 38.2%”
e7“per ton of rice produced, relative to conventional practices”
Claim · model-written summary
Nanotechnology has high potential for improving the utilization efficiency of N fertilizers in rice agriculture.
- Taxon
- riceOryza sativat0
- Outcome
- utilization efficiency of N fertilizerse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice nitrogen use efficiency”
e1“emphasizing the high potential of nanotechnology in agricultural applications, particularly in improving the utilization efficiency of N fertilizers”
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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.