Abstract
In order to study the effects of nitrogen fertilizer on some growth indices of rice cultivars (Oryza sativa L.), an experiment as factorial in RCBD with three replications was conducted during 2009 year in the Rice Research Institute, Iran, Rasht, central of Guilan and Rudsar, East of Guilan. Factors were cultivar (V1= Hashemi, V2= Ali Kazemi and V3= Khazar), and nitrogen fertilizer levels (N1= 0, N2= 30, N3=60, and N4= 90 Kg N/ha). Characters measured were: leaf area index (LAI), leaf dry weight (LDW), Total of dry weight (TDW), Crop growth rate (CGR), net assimilation rate (NAR) and grain yield. Growth parameters were calculated during two growth stages tillering and flowering by harvesting samples in all treatments. Results of growth analysis indicated that, nitrogen increasing rates of fertilizer caused the increment of growth indexes in comparison with don’t application fertilizer, highest these growth indexes were obtained in N4 treatment. Among of rice cultivars, Khazar showed higher growth indices rather than Ali Kazemi and Hashemi.
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Claims 2
Claim · model-written summary
Nitrogen fertilizer increased rice growth indices relative to no nitrogen application, highest at N4 (90 kg N/ha).
- Taxon
- rice
Oryza sativat0 - Organ / stage
- tillering and floweringe5
- Treatment
- nitrogen increasing rates of fertilizere1
- Outcome
- growth indexese1
- Direction
- incremente1
- Comparator
- N1= 0e3
- Setting
- Rice Research Institute, Iran, Rashte4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice cultivars under nitrogen fertilizer management”
e1“nitrogen increasing rates of fertilizer caused the increment of growth indexes”
e2“highest these growth indexes were obtained in N4 treatment”
e3“nitrogen fertilizer levels (N1= 0, N2= 30, N3=60, and N4= 90 Kg N/ha)”
e4“was conducted during 2009 year in the Rice Research Institute, Iran, Rasht”
e5“during two growth stages tillering and flowering”
Claim · model-written summary
Khazar showed higher growth indices than Ali Kazemi and Hashemi.
- Taxon
- riceOryza sativat0
- Material
- Khazare6
- Outcome
- growth indicese6
- Direction
- highere6
- Comparator
- Ali Kazemi and Hashemie6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice cultivars under nitrogen fertilizer management”
e6“Khazar showed higher growth indices rather than Ali Kazemi and Hashemi”
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