Abstract
Leaf color chart (LCC) guides fertilizer nitrogen (N) application to rice as per requirement of the crop on the basis of a critical leaf color. Two field experiments were conducted to evaluate the effect of silicon (Si) and LCC based N management in aerobic rice. Following LCC-based N management, from 60 to 90 kg N ha−1 and 75 to 100 kg N ha−1 with 10–40% and 25–30% less fertilizer N was used without any reduction in yield as compared to the package of practices of 100 (50 kg N ha−1 as basal + two split of 25 kg N ha−1) kg N ha−1 respectively, during both the seasons. The highest grain yield was noticed with 90 kg N ha−1 (30 kg N ha−1 as basal + LCC-3) and 100 kg N ha−1 (50 kg N ha−1 as basal + two split of 25 kg N ha−1) along with the application of calcium silicate (CaSiO3) at 2 t ha−1 as sources of Si and on par with 60 kg N ha−1 (no basal + LCC-3) and 75 kg N ha−1 (30 kg N ha−1 as basal + LCC-3), respectively, during the season in 2008 and 2009. Higher fertilizer N use efficiency was recorded with Si and need-based N management using LCC-3 rather than recommended dose of fertilizer N.
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Claims 8
Claim · model-written summary
LCC-guided nitrogen used 10–40% less fertilizer without reducing rice yield in 2008.
- Taxon
- rice
Oryza sativat0 - Treatment
- 60 to 90 kg N ha−1e0
- Outcome
- fertilizer Ne0
- Direction
- lesse0
- Value
- 10–40%e0
- Comparator
- package of practices of 100 (50 kg N ha−1 as basal + two split of 25 kg N ha−1) kg N ha−1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from 60 to 90 kg N ha−1 and 75 to 100 kg N ha−1 with 10–40% and 25–30% less fertilizer N was used without any reduction in yield as compared to the package of practices of 100 (50 kg N ha−1 as basal + two split of 25 kg N ha−1) kg N ha−1 respectively, during both the seasons”
t0“rice”
Claim · model-written summary
LCC-guided nitrogen used 25–30% less fertilizer in 2009.
- Taxon
- riceOryza sativat0
- Treatment
- 75 to 100 kg N ha−1e0
- Outcome
- fertilizer Ne0
- Direction
- lesse0
- Value
- 25–30%e0
- Comparator
- package of practices of 100 (50 kg N ha−1 as basal + two split of 25 kg N ha−1) kg N ha−1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from 60 to 90 kg N ha−1 and 75 to 100 kg N ha−1 with 10–40% and 25–30% less fertilizer N was used without any reduction in yield as compared to the package of practices of 100 (50 kg N ha−1 as basal + two split of 25 kg N ha−1) kg N ha−1 respectively, during both the seasons”
t0“rice”
Claim · model-written summary
LCC-guided nitrogen did not reduce rice yield relative to recommended practice.
- Taxon
- riceOryza sativat0
- Treatment
- LCC-based N managementt1
- Outcome
- yielde0
- Direction
- without any reductione0
- Comparator
- package of practices of 100 (50 kg N ha−1 as basal + two split of 25 kg N ha−1) kg N ha−1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“without any reduction in yield as compared to the package of practices of 100 (50 kg N ha−1 as basal + two split of 25 kg N ha−1) kg N ha−1”
t0“rice”
t1“LCC-based N management”
Claim · model-written summary
In 2008, 90 kg N with LCC-3 and calcium silicate produced the highest grain yield.
- Taxon
- riceOryza sativat0
- Treatment
- 90 kg N ha−1 (30 kg N ha−1 as basal + LCC-3)e0
- Outcome
- grain yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest grain yield was noticed with 90 kg N ha−1 (30 kg N ha−1 as basal + LCC-3) and 100 kg N ha−1 (50 kg N ha−1 as basal + two split of 25 kg N ha−1) along with the application of calcium silicate (CaSiO3) at 2 t ha−1 as sources of Si”
t0“rice”
Claim · model-written summary
In 2009, 100 kg N with calcium silicate produced the highest grain yield.
- Taxon
- riceOryza sativat0
- Treatment
- 100 kg N ha−1 (50 kg N ha−1 as basal + two split of 25 kg N ha−1)e0
- Outcome
- grain yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest grain yield was noticed with 90 kg N ha−1 (30 kg N ha−1 as basal + LCC-3) and 100 kg N ha−1 (50 kg N ha−1 as basal + two split of 25 kg N ha−1) along with the application of calcium silicate (CaSiO3) at 2 t ha−1 as sources of Si”
t0“rice”
Claim · model-written summary
The 60 kg N LCC-3 regime was on par for grain yield in 2008.
- Taxon
- riceOryza sativat0
- Treatment
- 60 kg N ha−1 (no basal + LCC-3)e0
- Outcome
- grain yieldt1
- Direction
- on pare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on par with 60 kg N ha−1 (no basal + LCC-3) and 75 kg N ha−1 (30 kg N ha−1 as basal + LCC-3), respectively, during the season in 2008 and 2009”
t0“rice”
t1“grain yield”
Claim · model-written summary
The 75 kg N LCC-3 regime was on par for grain yield in 2009.
- Taxon
- riceOryza sativat0
- Treatment
- 75 kg N ha−1 (30 kg N ha−1 as basal + LCC-3)e0
- Outcome
- grain yieldt1
- Direction
- on pare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on par with 60 kg N ha−1 (no basal + LCC-3) and 75 kg N ha−1 (30 kg N ha−1 as basal + LCC-3), respectively, during the season in 2008 and 2009”
t0“rice”
t1“grain yield”
Claim · model-written summary
Silicon with LCC-3 nitrogen management increased fertilizer nitrogen use efficiency over the recommended nitrogen dose.
- Taxon
- riceOryza sativat0
- Treatment
- Si and need-based N management using LCC-3e0
- Outcome
- fertilizer N use efficiencye0
- Direction
- Highere0
- Comparator
- recommended dose of fertilizer Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher fertilizer N use efficiency was recorded with Si and need-based N management using LCC-3 rather than recommended dose of fertilizer N”
t0“rice”
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