Iranian Journal of Field Crops Research

Iranian Journal of Field Crops Research

Effect of Nitrogen Fertilizer Rates on Morphological Traits, Yield and Yield Components of Three Cultivars of Rice

Document Type : Research Article

Authors
S. Gh Moosavi 1
O Mohamadi 2
R Baradaran 3
M. J Seghatoleslami 1
E Amiri 4
1 Islamic Azad University, Birjand Branch
2 Payam- nor university of lahijan
3 Islamic Azad University, Birjand Branc
4 Assistant Professor of Islamic Azad University, Lahijan Branch
10.22067/gsc.v13i1.28350
Abstract
In order to study the effect of N fertilizer rates on morphological traits, yield and yield components of rice cultivars, a study was carried out in Rice Research Institute of Rasht, Iran during 2009. It was a two-variable factorial experiment based on a randomized complete block design with three replications. The first factor was nitrogen fertilization at four rates of 0, 30, 60 and 90 kg N ha-1 and the second factor was rice cultivar at three levels of Hashemi, Ali-Kazemi and Khazar. The results of analysis of variance showed that N fertilizer rates did not significantly affect on panicle length, grain number per panicle, 1000- grain weight and harvest index but significantly affected plant height, tiller number per m2, panicle number per m2, grain yield and biological yield. Means comparison showed that as N rate was increased from 0 to 90 kg ha-1, plant height, tiller number per m2, panicle number per m2, grain yield and biological yield increased by 12.7, 27.6, 32.6, 84.5 and 61.6%, respectively. The cultivar significantly affected morphological traits, panicle number per m2, grain number per panicle, 1000-grain weight, grain yield and biological yield. The results indicated that cultivar of Khazar had the highest potential of grain yield (3424.5 kg ha-1). In total, application of 90 kg N ha-1 and cultivar of Khazar treatment was better for having the maximum production under the conditions of the current study.
Keywords
Cultivar
Nitrogen
Rice
Yield and yield components
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