Abstract
Effect of nitrogen (N) fertilizer levels on yield and yield components of rice (Hashemi, Ali kazemi and Khazar) was investigated in an experiment as factorial in randomized complete block design (RCBD) with three replications in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer); N2, 30 kg N/ha; N3, 60 kg N/ha; N4, 90 kg N/ha were compared. Results show that total biomass (8386 kg/ha), grain yield (3662 kg/ha), plant height (127.9 cm), tillers m-2 (250.22), panicles m-2 (235.8) and total grain per panicle (103.8) reached the highest value at high nitrogen level. Among the varieties, the highest total biomass (7734 kg/ha), grain yield (3414 kg/ha), unfilled percent (20.16%) and total grain per panicle (78.2) belonged to Khazar. Significantly, tiller m-2 (250.83) and panicle m-2 (235.91) were obtained from Hashemi. Also 1000-grains weight against various studied varieties revealed that Ali kazemi produced maximum 1000-grains weight (28.99 g). Among the different N application levels, significant difference was observed in all quality parameters except gelatinization temperature (GT); the highest amylose content (AC) was obtained from treatment N1 and significantly highest gel consistency (GC) was obtained from treatment N3. In general, GC was increased with N-fertilizer application and only result was changed from N3 to N4 and was reduced. Whereas AC was reduced from N1 to N3, and the result was reversed from N3 to N4. Meanwhile, the interaction effect of variety × nitrogen fertilizer did not show significant difference between all quality parameters except of GC. Key words: Nitrogen fertilizer, grain yield, yield components, dry matter production, quality parameters.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 20
Claim · model-written summary
At high nitrogen level rice total biomass reached 8386 kg/ha, the highest value among N levels.
- Taxon
- rice
Oryza sativat0 - Treatment
- high nitrogen levele1
- Outcome
- total biomasse1
- Direction
- reached the highest valuee1
- Value
- 8386 kg/hae1
- Comparator
- control (no N fertilizer)e0
- Setting
- paddy light soil at Guilan province, Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e1“Results show that total biomass (8386 kg/ha), grain yield (3662 kg/ha), plant height (127.9 cm), tillers m-2 (250.22), panicles m-2 (235.8) and total grain per panicle (103.8) reached the highest value at high nitrogen level”
Claim · model-written summary
At high nitrogen level rice grain yield reached 3662 kg/ha, the highest value among N levels.
- Taxon
- riceOryza sativat0
- Treatment
- high nitrogen levele1
- Outcome
- grain yielde1
- Direction
- reached the highest valuee1
- Value
- 3662 kg/hae1
- Comparator
- control (no N fertilizer)e0
- Setting
- paddy light soil at Guilan province, Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e1“Results show that total biomass (8386 kg/ha), grain yield (3662 kg/ha), plant height (127.9 cm), tillers m-2 (250.22), panicles m-2 (235.8) and total grain per panicle (103.8) reached the highest value at high nitrogen level”
Claim · model-written summary
At high nitrogen level rice plant height reached 127.9 cm, the highest value among N levels.
- Taxon
- riceOryza sativat0
- Treatment
- high nitrogen levele1
- Outcome
- plant heighte1
- Direction
- reached the highest valuee1
- Value
- 127.9 cme1
- Comparator
- control (no N fertilizer)e0
- Setting
- paddy light soil at Guilan province, Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e1“Results show that total biomass (8386 kg/ha), grain yield (3662 kg/ha), plant height (127.9 cm), tillers m-2 (250.22), panicles m-2 (235.8) and total grain per panicle (103.8) reached the highest value at high nitrogen level”
Claim · model-written summary
At high nitrogen level tillers per m2 reached 250.22, the highest value among N levels.
- Taxon
- riceOryza sativat0
- Treatment
- high nitrogen levele1
- Outcome
- tillers m-2e1
- Direction
- reached the highest valuee1
- Value
- 250.22e1
- Comparator
- control (no N fertilizer)e0
- Setting
- paddy light soil at Guilan province, Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e1“Results show that total biomass (8386 kg/ha), grain yield (3662 kg/ha), plant height (127.9 cm), tillers m-2 (250.22), panicles m-2 (235.8) and total grain per panicle (103.8) reached the highest value at high nitrogen level”
Claim · model-written summary
At high nitrogen level panicles per m2 reached 235.8, the highest value among N levels.
- Taxon
- riceOryza sativat0
- Treatment
- high nitrogen levele1
- Outcome
- panicles m-2e1
- Direction
- reached the highest valuee1
- Value
- 235.8e1
- Comparator
- control (no N fertilizer)e0
- Setting
- paddy light soil at Guilan province, Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e1“Results show that total biomass (8386 kg/ha), grain yield (3662 kg/ha), plant height (127.9 cm), tillers m-2 (250.22), panicles m-2 (235.8) and total grain per panicle (103.8) reached the highest value at high nitrogen level”
Claim · model-written summary
At high nitrogen level total grain per panicle reached 103.8, the highest value among N levels.
- Taxon
- riceOryza sativat0
- Treatment
- high nitrogen levele1
- Outcome
- total grain per paniclee1
- Direction
- reached the highest valuee1
- Value
- 103.8e1
- Comparator
- control (no N fertilizer)e0
- Setting
- paddy light soil at Guilan province, Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e1“Results show that total biomass (8386 kg/ha), grain yield (3662 kg/ha), plant height (127.9 cm), tillers m-2 (250.22), panicles m-2 (235.8) and total grain per panicle (103.8) reached the highest value at high nitrogen level”
Claim · model-written summary
Among the varieties, Khazar had the highest total biomass, 7734 kg/ha.
- Taxon
- riceOryza sativat0
- Material
- Khazare2
- Outcome
- total biomasse2
- Direction
- higheste2
- Value
- 7734 kg/hae2
- Comparator
- the varietiese2
- Setting
- paddy light soil at Guilan province, Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e2“Among the varieties, the highest total biomass (7734 kg/ha), grain yield (3414 kg/ha), unfilled percent (20.16%) and total grain per panicle (78.2) belonged to Khazar”
Claim · model-written summary
Among the varieties, Khazar had the highest grain yield, 3414 kg/ha.
- Taxon
- riceOryza sativat0
- Material
- Khazare2
- Outcome
- grain yielde2
- Direction
- higheste2
- Value
- 3414 kg/hae2
- Comparator
- the varietiese2
- Setting
- paddy light soil at Guilan province, Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e2“Among the varieties, the highest total biomass (7734 kg/ha), grain yield (3414 kg/ha), unfilled percent (20.16%) and total grain per panicle (78.2) belonged to Khazar”
Claim · model-written summary
Among the varieties, Khazar had the highest unfilled percent, 20.16%.
- Taxon
- riceOryza sativat0
- Material
- Khazare2
- Outcome
- unfilled percente2
- Direction
- higheste2
- Value
- 20.16%e2
- Comparator
- the varietiese2
- Setting
- paddy light soil at Guilan province, Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e2“Among the varieties, the highest total biomass (7734 kg/ha), grain yield (3414 kg/ha), unfilled percent (20.16%) and total grain per panicle (78.2) belonged to Khazar”
Claim · model-written summary
Among the varieties, Khazar had the highest total grain per panicle, 78.2.
- Taxon
- riceOryza sativat0
- Material
- Khazare2
- Outcome
- total grain per paniclee2
- Direction
- higheste2
- Value
- 78.2e2
- Comparator
- the varietiese2
- Setting
- paddy light soil at Guilan province, Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e2“Among the varieties, the highest total biomass (7734 kg/ha), grain yield (3414 kg/ha), unfilled percent (20.16%) and total grain per panicle (78.2) belonged to Khazar”
Claim · model-written summary
Hashemi gave significantly more tillers per m2, 250.83, than the other varieties.
- Taxon
- riceOryza sativat0
- Material
- Hashemie3
- Outcome
- tiller m-2e3
- Direction
- higherinferrede3
- Value
- 250.83e3
- Setting
- paddy light soil at Guilan province, Irane0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e3“Significantly, tiller m-2 (250.83) and panicle m-2 (235.91) were obtained from Hashemi”
Claim · model-written summary
Hashemi gave significantly more panicles per m2, 235.91, than the other varieties.
- Taxon
- riceOryza sativat0
- Material
- Hashemie3
- Outcome
- panicle m-2e3
- Direction
- higherinferrede3
- Value
- 235.91e3
- Setting
- paddy light soil at Guilan province, Irane0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e3“Significantly, tiller m-2 (250.83) and panicle m-2 (235.91) were obtained from Hashemi”
Claim · model-written summary
Ali kazemi produced the maximum 1000-grain weight, 28.99 g, among the varieties.
- Taxon
- riceOryza sativat0
- Material
- Ali kazemie4
- Outcome
- 1000-grains weighte4
- Direction
- maximume4
- Value
- 28.99 ge4
- Comparator
- various studied varietiese4
- Setting
- paddy light soil at Guilan province, Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e4“Also 1000-grains weight against various studied varieties revealed that Ali kazemi produced maximum 1000-grains weight (28.99 g)”
Claim · model-written summary
Among N application levels, significant differences were found in all quality parameters except gelatinization temperature.
- Taxon
- riceOryza sativat0
- Treatment
- different N application levelse5
- Outcome
- quality parameterse5
- Qualifier
- except gelatinization temperature (GT)e5
- Setting
- paddy light soil at Guilan province, Irane0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e5“Among the different N application levels, significant difference was observed in all quality parameters except gelatinization temperature (GT); the highest amylose content (AC) was obtained from treatment N1 and significantly highest gel consistency (GC) was obtained from treatment N3”
Claim · model-written summary
Amylose content was reduced from N1 to N3; the highest amylose content was obtained from N1.
- Taxon
- riceOryza sativat0
- Treatment
- N1 to N3e6
- Outcome
- ACe6
- Direction
- reducede6
- Qualifier
- the highest amylose content (AC) was obtained from treatment N1e5
- Setting
- paddy light soil at Guilan province, Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e5“Among the different N application levels, significant difference was observed in all quality parameters except gelatinization temperature (GT); the highest amylose content (AC) was obtained from treatment N1 and significantly highest gel consistency (GC) was obtained from treatment N3”
e6“In general, GC was increased with N-fertilizer application and only result was changed from N3 to N4 and was reduced. Whereas AC was reduced from N1 to N3, and the result was reversed from N3 to N4”
Claim · model-written summary
Amylose content reversed from N3 to N4.
- Taxon
- riceOryza sativat0
- Treatment
- from N3 to N4e6
- Outcome
- ACe6
- Direction
- reversede6
- Setting
- paddy light soil at Guilan province, Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e6“In general, GC was increased with N-fertilizer application and only result was changed from N3 to N4 and was reduced. Whereas AC was reduced from N1 to N3, and the result was reversed from N3 to N4”
Claim · model-written summary
Significantly highest gel consistency was obtained from treatment N3.
- Taxon
- riceOryza sativat0
- Treatment
- treatment N3e5
- Outcome
- gel consistency (GC)e5
- Direction
- higheste5
- Setting
- paddy light soil at Guilan province, Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e5“Among the different N application levels, significant difference was observed in all quality parameters except gelatinization temperature (GT); the highest amylose content (AC) was obtained from treatment N1 and significantly highest gel consistency (GC) was obtained from treatment N3”
Claim · model-written summary
Gel consistency increased with N-fertilizer application.
- Taxon
- riceOryza sativat0
- Treatment
- N-fertilizer applicatione6
- Outcome
- GCe6
- Direction
- increasede6
- Setting
- paddy light soil at Guilan province, Irane0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e6“In general, GC was increased with N-fertilizer application and only result was changed from N3 to N4 and was reduced. Whereas AC was reduced from N1 to N3, and the result was reversed from N3 to N4”
Claim · model-written summary
Gel consistency was reduced from N3 to N4.
- Taxon
- riceOryza sativat0
- Treatment
- N4e6
- Outcome
- GCe6
- Direction
- reducede6
- Comparator
- N3e6
- Setting
- paddy light soil at Guilan province, Irane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e6“In general, GC was increased with N-fertilizer application and only result was changed from N3 to N4 and was reduced. Whereas AC was reduced from N1 to N3, and the result was reversed from N3 to N4”
Claim · model-written summary
The variety × nitrogen interaction did not significantly affect quality parameters, except GC.
- Taxon
- riceOryza sativat0
- Treatment
- variety × nitrogen fertilizere7
- Outcome
- quality parameterse7
- Qualifier
- except of GCe7
- Setting
- paddy light soil at Guilan province, Irane0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of nitrogen on rice yield”
e0“in a paddy light soil at Guilan province, Iran, in the year 2008 to 2009. In this experiment, four treatments including: N1, control (no N fertilizer)”
e7“the interaction effect of variety × nitrogen fertilizer did not show significant difference between all quality parameters except of GC”
The same questions in other 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
- positive
- positive
- positive
507 papers more in this group
See all 511 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
- positive
- positive
- positive
2,041 papers more in this group
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.