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Need-based fertilizer nitrogen management using leaf colour chart in hybrid rice (Oryza sativa)

Indian Agricultural Research Journals

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Title Need-based fertilizer nitrogen management using leaf colour chart in hybrid rice (Oryza sativa)
 
Creator GUPTA, R K
SINGH, VARINDERPAL
SINGH, YADVINDER
SINGH, BIJAY
THIND, H S
KUMAR, AJAY
VASHISTHA, MONIKA
 
Subject Hybrid rice, Leaf colour chart, Nitrogen management, N-use efficiency
 
Description Field experiments were conducted during 2006–08 to study the response of hybrid rice cultivar PHB 71 to fertilizer N and to study the possibility of improving N-use efficiency by affecting fertilizer N as per need of the crop as guided by leaf colour chart (LCC). Treatments included six rates of N application (0, 60, 90, 120,150 and 180 kg/ha) applied in three equal splits at fixed growth stages. The two need-based N management treatments comprised of application of 20 kg N / ha as basal dose and application of 30 kg N /ha whenever greenness first fully opened leaf from the top was less than shade 4 or 5 on the LCC. Hybrid rice PHB 71 showed significant response to application of N up to 120 kg N /ha applied in three equal split doses. Beyond this level fertilizer N-use efficiency was significantly reduced. The LCC shade 4 proved better than LCC shade 5 for guiding real time N management and achieving higher N-use efficiency. Application of 80–110 kg N /ha using threshold LCC shade 4 inclusive of 20 kg N /ha as basal dose produced grain yield of rice which was at par with the application of 120 kg N /ha applied in three equal split doses.
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor —
 
Date 2011-12-07
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/13313
 
Source The Indian Journal of Agricultural Sciences; Vol 81, No 12 (2011)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/13313/6701
 
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