Abstract
Field experiment was conducted at Tsuruoka City, Yamagata Prefecture, Japan in 1998 15 N trace method was used to test the effects of polyolefin coated urea (controlled release fertilizer) as basal on rice yield, the pattern of N absorption and N recovery rate compared with urea and ammonium sulfate with split application Results indicated that: 1) For transplanting rice, the highest yield was obtained by the blend of urea and LPS 100 in the ratio of 1:1 as basal, and increased by 23 6% and 9 2% compared with urea and ammonium sulfate, respectively For the direct seeding rice the highest yield was obtained by LP 100 as basal, and increased by 9 2% and 4 0% compared with urea and ammonium sulfate, respectively Controlled release fertilizer treatments could give more effective panicles and filled grains of rice than urea and ammonium sulfate treatments 2) No significant difference was observed in total N uptake among fertilizer treatments But the N accumulation from transplanting (or seeding) to panicle initiation in plants treated with controlled fertilizer were much more than conventional fertilization, resulting in the greater number of panicles per unit area and filled grains per panicle 3) 15 N labeled experiment indicated that up to maximum tiller stage N absorption of rice from basal fertilizer of urea and ammonium sulfate accounted for 33%～45% of total N absorption from basal fertilizer only N uptake from basal fertilizer lasted to heading stage in urea or ammonium sulfate plots and to harvesting stage in LP 100 plot While N uptake from topdressing applied at panicle initiation stage completed on 45 days after application 4) The total N recovery rate tested using 15 N method was higher in urea plot than ammonium sulfate and LP 100, while that tested using difference method was higher in the LP 100 than other treatments The N recovery rate of basal fertilizer was in the order of LP 100ammonium sulfate urea Basal application of urea/LPS 100 blend and LP 100 had higher physiological and agronomic efficiency of N than urea and ammonium sulfate, that may be the main reason for getting high yield by controlled fertilizer in the trail
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Claims 9
Claim · model-written summary
A urea and LPS 100 blend gave the highest transplanted rice yield, exceeding urea and ammonium sulfate by 23 6% and 9 2%.
- Taxon
- rice
Oryza sativae0 - Treatment
- blend of urea and LPS 100 in the ratio of 1:1 as basale0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 23 6% and 9 2%e0
- Comparator
- urea and ammonium sulfatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For transplanting rice, the highest yield was obtained by the blend of urea and LPS 100 in the ratio of 1:1 as basal, and increased by 23 6% and 9 2% compared with urea and ammonium sulfate, respectively”
Claim · model-written summary
LP 100 basal fertilizer gave the highest direct-seeded rice yield, 9 2% and 4 0% above urea and ammonium sulfate.
- Taxon
- riceOryza sativae0
- Treatment
- LP 100 as basale0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 9 2% and 4 0%e0
- Comparator
- urea and ammonium sulfatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For the direct seeding rice the highest yield was obtained by LP 100 as basal, and increased by 9 2% and 4 0% compared with urea and ammonium sulfate, respectively”
Claim · model-written summary
Controlled release fertilizers produced more effective panicles and filled grains.
- Taxon
- riceOryza sativae0
- Treatment
- Controlled release fertilizer treatmentse0
- Outcome
- effective panicles and filled grainse0
- Direction
- moree0
- Comparator
- urea and ammonium sulfate treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Controlled release fertilizer treatments could give more effective panicles and filled grains of rice than urea and ammonium sulfate treatments”
Claim · model-written summary
Total nitrogen uptake did not differ significantly among fertilizer treatments.
- Taxon
- riceOryza sativat0
- Treatment
- fertilizer treatmentse0
- Outcome
- total N uptakee0
- Direction
- No significant differencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“No significant difference was observed in total N uptake among fertilizer treatments”
Claim · model-written summary
Controlled fertilizer increased nitrogen accumulation before panicle initiation relative to conventional fertilization.
- Taxon
- riceOryza sativat0
- Treatment
- controlled fertilizere0
- Outcome
- N accumulatione0
- Direction
- much moree0
- Comparator
- conventional fertilizatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“the N accumulation from transplanting (or seeding) to panicle initiation in plants treated with controlled fertilizer were much more than conventional fertilization”
Claim · model-written summary
Basal nitrogen uptake lasted until harvest with LP 100, versus heading with urea or ammonium sulfate.
- Taxon
- riceOryza sativat0
- Treatment
- LP 100e0
- Outcome
- N uptake from basal fertilizere0
- Qualifier
- harvesting stagee0
- Comparator
- urea or ammonium sulfatee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N uptake from basal fertilizer lasted to heading stage in urea or ammonium sulfate plots and to harvesting stage in LP 100 plot”
t0“rice”
Claim · model-written summary
The 15 N method ranked urea highest for total nitrogen recovery.
- Taxon
- riceOryza sativat0
- Treatment
- ureae0
- Outcome
- total N recovery ratee0
- Direction
- highere0
- Comparator
- ammonium sulfate and LP 100e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“The total N recovery rate tested using 15 N method was higher in urea plot than ammonium sulfate and LP 100”
Claim · model-written summary
The difference method ranked LP 100 highest for total nitrogen recovery.
- Taxon
- riceOryza sativat0
- Treatment
- LP 100e0
- Outcome
- total N recovery ratee1
- Direction
- highere0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“that tested using difference method was higher in the LP 100 than other treatments”
e1“The total N recovery rate”
Claim · model-written summary
Basal urea/LPS 100 blend and LP 100 had higher physiological and agronomic nitrogen efficiency than conventional fertilizers.
- Taxon
- riceOryza sativat0
- Treatment
- urea/LPS 100 blend and LP 100e0
- Outcome
- physiological and agronomic efficiency of Ne0
- Direction
- highere0
- Comparator
- urea and ammonium sulfatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Basal application of urea/LPS 100 blend and LP 100 had higher physiological and agronomic efficiency of N than urea and ammonium sulfate”
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