Abstract
Field trials in different locations were carried out to study effects of controlled-release urea(CRU)application on the yield,nutrient uptaking and nitrogen fertilizer use efficiency of rice.The results showed that the application of CRU significantly increased the yield of rice grain by 5.3%-7.8% comparing with that of the common urea treatment(total as basal)when subtracted 25% N,and increased the yield by 2.6%-2.9%comparing with that of common urea treatment(split application).The significant quadratic function correlation was found between the rice yield and the application amount of CRU.Increasing the number of filled grains was the main factor that CRU increased the yield of rice.The results also showed that the nitrogen content in the dry matter and N nutrient uptaking of rice were all increased significantly for the treatment CRU.The application of CRU increased the nitrogen use efficiency by 17.1%-34.1% comparing with the common urea.The appropriate N application amount of controlled-release urea for rice was 102-128kg/hm2 under the target yield of 8.35-8.41t/hm2.Controlled-release urea could not only decrease the nitrogen application amount by 14.7%-32.0%,but also reduce the fertilization time for labor saving and high efficiency.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Controlled-release urea increased rice grain yield by 5.3%-7.8% against basal common urea with 25% less nitrogen.
- Treatment
- CRUe0
- Outcome
- yield of rice graine0
- Direction
- increasede0
- Value
- 5.3%-7.8%e0
- Qualifier
- when subtracted 25% Ne0
- Comparator
- common urea treatment(total as basal)e0
Not reportedTaxon
Verbatim
e0“application of CRU significantly increased the yield of rice grain by 5.3%-7.8% comparing with that of the common urea treatment(total as basal)when subtracted 25% N”
Claim · model-written summary
Controlled-release urea increased rice grain yield by 2.6%-2.9% against split common urea.
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 2.6%-2.9%e0
- Comparator
- common urea treatment(split application)e0
Not reportedTaxonTreatment
Verbatim
e0“increased the yield by 2.6%-2.9%comparing with that of common urea treatment(split application)”
Claim · model-written summary
Rice yield had a significant quadratic relation with controlled-release urea application amount.
- Taxon
- rice
Oryza sativae0 - Treatment
- CRUe0
- Outcome
- rice yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The significant quadratic function correlation was found between the rice yield and the application amount of CRU”
Claim · model-written summary
More filled grains was the main factor in the yield increase under controlled-release urea.
- Taxon
- riceOryza sativae0
- Treatment
- CRUe0
- Outcome
- yield of ricee0
- Qualifier
- Increasing the number of filled grainse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the number of filled grains was the main factor that CRU increased the yield of rice”
Claim · model-written summary
Controlled-release urea significantly increased rice dry matter nitrogen content.
- Taxon
- riceOryza sativae0
- Treatment
- CRUe0
- Outcome
- nitrogen content in the dry mattere0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen content in the dry matter and N nutrient uptaking of rice were all increased significantly for the treatment CRU”
Claim · model-written summary
Controlled-release urea significantly increased rice nitrogen uptake.
- Taxon
- riceOryza sativae0
- Treatment
- CRUe0
- Outcome
- N nutrient uptakinge0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen content in the dry matter and N nutrient uptaking of rice were all increased significantly for the treatment CRU”
Claim · model-written summary
Controlled-release urea increased nitrogen use efficiency by 17.1%-34.1% against common urea.
- Treatment
- CRUe0
- Outcome
- nitrogen use efficiencye0
- Direction
- increasede0
- Value
- 17.1%-34.1%e0
- Comparator
- common ureae0
Not reportedTaxon
Verbatim
e0“The application of CRU increased the nitrogen use efficiency by 17.1%-34.1% comparing with the common urea”
Claim · model-written summary
The appropriate controlled-release urea nitrogen rate for rice was 102-128kg/hm2 at a target yield of 8.35-8.41t/hm2.
- Taxon
- riceOryza sativae0
- Treatment
- controlled-release ureae0
- Outcome
- appropriate N application amounte0
- Value
- 102-128kg/hm2e0
- Qualifier
- target yield of 8.35-8.41t/hm2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The appropriate N application amount of controlled-release urea for rice was 102-128kg/hm2 under the target yield of 8.35-8.41t/hm2”
Claim · model-written summary
Controlled-release urea could decrease nitrogen application by 14.7%-32.0%.
- Treatment
- Controlled-release ureae0
- Outcome
- nitrogen application amounte0
- Direction
- decreasee0
- Value
- 14.7%-32.0%e0
Not reportedTaxonComparator
Verbatim
e0“Controlled-release urea could not only decrease the nitrogen application amount by 14.7%-32.0%”
Claim · model-written summary
Controlled-release urea could reduce fertilization time.
Not reportedTaxonComparator
Verbatim
e0“Controlled-release urea could not only decrease the nitrogen application amount by 14.7%-32.0%,but also reduce the fertilization time for labor saving and high efficiency”
The same questions in other papers
fertilization · nutrient: efficiency · Oryza sativa (rice)Positive and negative results
201 papers in the same direction as this paper · 12 in the opposite direction · 6 reporting no difference from an alternative
- no effect
- no effect
- negative
216 papers more in this group
See all 220 papers →nitrogen · nutrient: efficiency · Oryza sativa (rice)Positive and negative results
216 papers in the same direction as this paper · 41 in the opposite direction · 4 reporting no difference from an alternative
- negative
- negative
- no effect
258 papers more in this group
See all 262 papers →nitrogen · nutrient: content · Oryza sativa (rice)Positive and negative results
408 papers in the same direction as this paper · 52 in the opposite direction · 3 reporting no difference from an alternative
- negative
- no effect
- negative
460 papers more in this group
See all 464 papers →nitrogen · growth · Oryza sativa (rice)Positive and negative results
401 papers in the same direction as this paper · 101 in the opposite direction · 8 reporting no difference from an alternative
- negative
- negative
- negative
507 papers more in this group
See all 511 papers →fertilization · growth · Oryza sativa (rice)Positive and negative results
669 papers in the same direction as this paper · 81 in the opposite direction · 8 reporting no difference from an alternative
- negative
- negative
- negative
755 papers more in this group
See all 759 papers →fertilization · nutrient: content · Oryza sativa (rice)Positive and negative results
931 papers in the same direction as this paper · 56 in the opposite direction · 5 reporting no difference from an alternative
- negative
- no effect
- no effect
989 papers more in this group
See all 993 papers →nitrogen · yield · Oryza sativa (rice)Positive and negative results
1,802 papers in the same direction as this paper · 193 in the opposite direction · 49 reporting no difference from an alternative
- negative
- negative
- negative
2,041 papers more in this group
See all 2,045 papers →fertilization · yield · Oryza sativa (rice)Positive and negative results
3,182 papers in the same direction as this paper · 207 in the opposite direction · 65 reporting no difference from an alternative
- no effect
- no effect
- negative
3,451 papers more in this group
See all 3,455 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.