Abstract
Field experiments were conducted in Changsha and Hengshan county of Hunan province. Yield increase efficiency and nutrient utilization of controlled-release nitrogen fertilizer in different paddy soils was studied. Results showed that it could be profitable to determine rate of controlled-release nitrogen fertilizer according to the basic fertility level of paddy soil. It was recommended that the amount of rice controlled-release nitrogen fertilizer should be increased in paddy soils of low fertility. The amount should be decreased in paddy soils of high fertility. The Yield of rice by controlled-release N fertilizer application (90 kgN/ha) was 4.9%-16.4% higher than the urea treatment of equal N amount, was 13.8%-60.9% higher than no N plot among different basic soil fertility level. Nitrogen recovery of rice controlled-release nitrogen fertilizer was changed in the ranged from 69.7%～86.9%, and was 37.5% higher than that of urea treatment with 90 kgN/ha by early rice and later rice in different basic soil fertility level. N recovery of controlled-release nitrogen fertilizer was related with soil fertility level. One time application of controlled-release nitrogen fertilizer had higher physiological and agronomic 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 8
Claim · model-written summary
Authors recommend increasing controlled release nitrogen fertilizer on low fertility soils.
- Taxon
- rice
Oryza sativat0 - Outcome
- amount of rice controlled-release nitrogen fertilizere0
- Direction
- increasede0
- Qualifier
- paddy soils of low fertilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the amount of rice controlled-release nitrogen fertilizer should be increased in paddy soils of low fertility.”
t0“Rice”
Claim · model-written summary
Authors recommend decreasing controlled release nitrogen fertilizer on high fertility soils.
- Taxon
- riceOryza sativat0
- Outcome
- amounte0
- Direction
- decreasede0
- Qualifier
- paddy soils of high fertilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amount should be decreased in paddy soils of high fertility.”
t0“Rice”
Claim · model-written summary
Rice yield under controlled release N was 4.9%-16.4% higher than with equal N urea.
- Taxon
- riceOryza sativat0
- Treatment
- controlled-release N fertilizer application (90 kgN/ha)e0
- Outcome
- Yielde0
- Direction
- highere0
- Value
- 4.9%-16.4%e0
- Comparator
- urea treatment of equal N amounte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Yield of rice by controlled-release N fertilizer application (90 kgN/ha) was 4.9%-16.4% higher than the urea treatment of equal N amount”
t0“Rice”
Claim · model-written summary
Rice yield under controlled release N was 13.8%-60.9% higher than no N.
- Taxon
- riceOryza sativat0
- Direction
- highere0
- Value
- 13.8%-60.9%e0
- Comparator
- no N plote0
Not reportedTreatmentOutcome
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was 13.8%-60.9% higher than no N plot among different basic soil fertility level.”
t0“Rice”
Claim · model-written summary
Nitrogen recovery ranged from 69.7% to 86.9%.
- Taxon
- riceOryza sativat0
- Treatment
- controlled-release nitrogen fertilizere0
- Outcome
- Nitrogen recoverye0
- Value
- 69.7%～86.9%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen recovery of rice controlled-release nitrogen fertilizer was changed in the ranged from 69.7%～86.9%”
t0“Rice”
Claim · model-written summary
Nitrogen recovery was 37.5% higher than with urea at 90 kgN/ha.
- Taxon
- riceOryza sativat0
- Direction
- highere0
- Value
- 37.5%e0
- Qualifier
- early rice and later rice in different basic soil fertility levele0
- Comparator
- urea treatment with 90 kgN/hae0
Not reportedTreatmentOutcome
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was 37.5% higher than that of urea treatment with 90 kgN/ha by early rice and later rice in different basic soil fertility level.”
t0“Rice”
Claim · model-written summary
Nitrogen recovery was related to soil fertility level.
- Taxon
- riceOryza sativat0
- Outcome
- N recoverye0
- Setting
- soil fertility levele0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N recovery of controlled-release nitrogen fertilizer was related with soil fertility level.”
t0“Rice”
Claim · model-written summary
One time controlled release fertilizer application had higher physiological and agronomic efficiency.
- Taxon
- riceOryza sativat0
- Treatment
- One time application of controlled-release nitrogen fertilizere0
- Outcome
- physiological and agronomic efficiencye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One time application of controlled-release nitrogen fertilizer had higher physiological and agronomic efficiency.”
t0“Rice”
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 →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
- positive
- no effect
- no effect
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.