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

20.1001.1.20081472.1394.13.1.16.6

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