Effects of Nitrogen Rates and Application Method on Grain Yield and Yield

Document Type : Research Article

Authors

• Sh Babazadeh
• M Kavoosi
• M Esfandiari
• M Nahvi
• M Allahgholipour

Research Associate Professor, Department of Seed Improvement, Rice Research Institute of Iran, Agricultural Research, Education and Extension Organization (AREEO), Rasht, Iran.

10.22067/gsc.v9i4.13284

Abstract

Proper application of N fertilizer and its optimization for increasing the economic yield of rice is definitely
important. In order to determine the best N application method and amount according to growth stages of hybrid
rice, an experiment was carried out at experimental farm of RRII in a factorial experiment based on a
randomized complete block design with 3 replications. The treatments included 6 application methods as follow:
total nitrogen at transplanting stage ,50% at transplanting stage +50% at early tillering , 50% at transplanting
stage +50% at panicle initiation , 50% at transplanting stage +25% at maximum tillering +25% at booting ,34%
at transplanting stage + 33% at early tillering + 33% at booting and 70% at transplanting + 30% at panicle
initiation. 3 levels of nitrogen (90,120 and 150 kg/ha) from urea source were also used. Recorded traits were
grain yield and yield component. Results showed the significant interactions between split methods and N rates
on yield, flag leaf area, filled and unfilled grain number per panicle and percentage fertility (p

Keywords

• Application method of nitrogen
• Hybrid rice
• yield

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