Abstract
Pot and field experiments were conducted to study the dosage and the effect of compound nitrogen fertilizer synergists combined with different dosage of urea on the growth,yield,uptake and nitrogen use efficiency of rice with()~(15)N-labled.The results showed that the growth of rice seedling was obviously promoted with appropriate dosage of compound nitrogen fertilizer synergists(20% of N).Treated with urea and added with compound nitrogen fertilizer synergists,the growth of rice wasn't affected,the Ndff%,the total()~(15)N uptake and total nitrogen uptake of rice and the nitrogen use efficiency were increased.Treated with urea reduced by 5%~15%(7.8~23.7 kg/hm~2) and added with compound nitrogen fertilizer synergists,the growth,yield,and nitrogen content of rice were not affected,the total()~(15)N uptake and total nitrogen uptake of rice were the same as CK_2 or higher than it,and the nitrogen use efficiency,physiological rate and agronomic use efficiency of nitrogen were remarkably increased comparing to CK_2.Treatment with urea reduced by 30% and compound nitrogen fertilizer synergists,the growth and absorption and utilization of nitrogen of rice were apparently decreased.As a result,treated with appropriate dosage of compound nitrogen fertilizer synergists(20% of urea),the growth and yield of rice were not affected,the utilization of nitrogen was enhanced and the dosage of nitrogen fertilizer was decreased by 15%.
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Claims 8
Claim · model-written summary
An appropriate synergist dose promoted rice seedling growth.
- Taxon
- rice
Oryza sativae0 - Treatment
- appropriate dosage of compound nitrogen fertilizer synergists(20% of N)e0
- Outcome
- growth of rice seedlinge0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of rice seedling was obviously promoted with appropriate dosage of compound nitrogen fertilizer synergists(20% of N)”
Claim · model-written summary
Urea plus synergists did not affect rice growth.
- Taxon
- riceOryza sativae0
- Treatment
- urea and added with compound nitrogen fertilizer synergistse0
- Outcome
- growth of ricee0
- Direction
- wasn't affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treated with urea and added with compound nitrogen fertilizer synergists,the growth of rice wasn't affected”
Claim · model-written summary
Urea plus synergists increased Ndff%, labeled nitrogen uptake, total nitrogen uptake and nitrogen use efficiency.
- Taxon
- riceOryza sativae0
- Treatment
- urea and added with compound nitrogen fertilizer synergistse0
- Outcome
- Ndff%,the total()~(15)N uptake and total nitrogen uptake of rice and the nitrogen use efficiencye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treated with urea and added with compound nitrogen fertilizer synergists,the growth of rice wasn't affected,the Ndff%,the total()~(15)N uptake and total nitrogen uptake of rice and the nitrogen use efficiency were increased”
Claim · model-written summary
Reducing urea by 5% to 15% with synergists did not affect growth, yield or nitrogen content.
- Taxon
- riceOryza sativae0
- Treatment
- urea reduced by 5%~15%(7.8~23.7 kg/hm~2) and added with compound nitrogen fertilizer synergistse0
- Outcome
- growth,yield,and nitrogen content of ricee0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treated with urea reduced by 5%~15%(7.8~23.7 kg/hm~2) and added with compound nitrogen fertilizer synergists,the growth,yield,and nitrogen content of rice were not affected”
Claim · model-written summary
With 5% to 15% less urea and synergists, labeled and total nitrogen uptake equaled or exceeded CK_2.
- Taxon
- riceOryza sativae0
- Outcome
- total()~(15)N uptake and total nitrogen uptake of ricee0
- Direction
- the same as CK_2 or highere0
- Comparator
- CK_2e0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the total()~(15)N uptake and total nitrogen uptake of rice were the same as CK_2 or higher than it”
Claim · model-written summary
With reduced urea and synergists, nitrogen use, physiological and agronomic efficiencies increased versus CK_2.
- Taxon
- RiceOryza sativat0
- Outcome
- nitrogen use efficiency,physiological rate and agronomic use efficiency of nitrogene0
- Direction
- increasede0
- Comparator
- CK_2e0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the nitrogen use efficiency,physiological rate and agronomic use efficiency of nitrogen were remarkably increased comparing to CK_2”
t0“Rice”
Claim · model-written summary
A 30% urea reduction with synergists decreased rice growth and nitrogen absorption and utilization.
- Taxon
- riceOryza sativae0
- Treatment
- urea reduced by 30% and compound nitrogen fertilizer synergistse0
- Outcome
- growth and absorption and utilization of nitrogen of ricee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with urea reduced by 30% and compound nitrogen fertilizer synergists,the growth and absorption and utilization of nitrogen of rice were apparently decreased”
Claim · model-written summary
The authors concluded an appropriate synergist dose maintained rice growth and yield, improved nitrogen utilization, and allowed 15% less fertilizer.
- Taxon
- riceOryza sativae0
- Treatment
- appropriate dosage of compound nitrogen fertilizer synergists(20% of urea)e0
- Outcome
- utilization of nitrogen was enhancede0
- Qualifier
- dosage of nitrogen fertilizer was decreased by 15%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treated with appropriate dosage of compound nitrogen fertilizer synergists(20% of urea),the growth and yield of rice were not affected,the utilization of nitrogen was enhanced and the dosage of nitrogen fertilizer was decreased by 15%”
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