Abstract
Nitrogen (N) is an important component of rice cultivation system, especially where rice is grown under aerobic condition. This study examined the effects of Silicon (Si) and leaf colour chart (LCC) based N management on yield and N use efficiency in aerobic rice. A field experiment was conducted during wet season 2008 in sandy loam soil at Bangalore-north with split plot design. The treatments consist four main plots viz., control (No N), 60 Kg N ha−1 (No basal + LCC-3), 90 Kg N ha−1 (Urea 30 Kg N ha−1 as basal + LCC-3) and 100 Kg N ha−1 as urea (RDF) and two sub plots viz., with (calcium silicate at 2 t ha−1) and without Si treated plots. Periodical LCC readings were taken and N was applied if the LCC value falls below the prescribed critical value. The results revealed that the highest grain yield was recorded with the application calcium silicate at 2 t ha−1 and with 90 Kg N ha−1 (Urea at 30 Kg N ha−1 as basal + LCC-3) and it was on par with 60 Kg N ha−1 (no basal + LCC-3) compared to recommended N (100 Kg N ha−1) under aerobic rice. Higher fertilizer N-use efficiency was recorded with the application of Si and need-based N management using LCC-3 rather than recommended dose of fertilizer over control.
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Claims 3
Claim · model-written summary
Calcium silicate and 90 Kg N ha−1 gave the highest grain yield.
- Taxon
- rice
Oryza sativae0 - Treatment
- calcium silicate at 2 t ha−1 and with 90 Kg N ha−1e0
- Outcome
- grain yielde0
- Direction
- higheste0
- Qualifier
- on par with 60 Kg N ha−1e0
- Comparator
- recommended N (100 Kg N ha−1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest grain yield was recorded with the application calcium silicate at 2 t ha−1 and with 90 Kg N ha−1 (Urea at 30 Kg N ha−1 as basal + LCC-3) and it was on par with 60 Kg N ha−1 (no basal + LCC-3) compared to recommended N (100 Kg N ha−1) under aerobic rice”
Claim · model-written summary
The 90 Kg N ha−1 treatment was on par with 60 Kg N ha−1 for yield.
- Taxon
- riceOryza sativae0
- Outcome
- grain yieldt1
- Direction
- on pare0
- Comparator
- 60 Kg N ha−1 (no basal + LCC-3)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it was on par with 60 Kg N ha−1 (no basal + LCC-3) compared to recommended N (100 Kg N ha−1) under aerobic rice”
t0“rice”
t1“grain yield”
Claim · model-written summary
Silicon and LCC-3 based nitrogen management raised fertilizer nitrogen use efficiency against recommended fertilizer.
- Taxon
- riceOryza sativat0
- Treatment
- application of Si and need-based N management using LCC-3e0
- Outcome
- fertilizer N-use efficiencye0
- Direction
- Highere0
- Comparator
- recommended dose of fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher fertilizer N-use efficiency was recorded with the application of Si and need-based N management using LCC-3 rather than recommended dose of fertilizer over control”
t0“rice”
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