Effect of nitrogen, bio-fertilizer, and silicon application on yield and yield components of rice (Oryza sativa L.)

Issue Date

4-2015

Abstract

A field experiment was conducted in Neka, Mazandaran, north of Iran, to determine the effect of nitrogen (N), N₂-fixing bacteria (Azospirilum + Azotobacter), and silicon (Si) on rice grain yield and yield components. Treatments were: N rates (0, 75, 150 kg ha ˉ¹), bio-fertilizer application (inoculation with or without Azospiirilum + Azotobacter), and Si rates (0, 150, 300 kg ha ˉ¹). Rice grain yield was significantly affected by N rate, bio-fertilizer application and Si rate. The interaction between N rate and bio-fertilizer rate was significant for yield. With bio-fertilizer application, grain yield was significantly increased as N rate increased from 0 to 75 kg N haˉ¹ , but slightly reduced at 150 kg haˉ¹ N rate. Without bio-fertilizer application, the highest grain yield was obtained in plots applied with 150 kg N haˉ¹. Regardless of N rate and bio-fertilizer application, the highest grain yield (5287 kg haˉ¹) was observed in plots applied with 300 kg Si haˉ¹. Nitrogen application significantly increased plant height, tiller number per m², grain number per particle, 1000-grain weight, biological yield, harvest index, grain N concentration, and grain N uptake across bio-fertilizer applications and Si rates. Across N and Si rates plant height, tiller number per m², grain number per particle, biological yield harvest index, grain N concentration, and grain N uptake were significantly increased with bio-fertilizer application. Moreover, Si application increased significantly plant height, tiller number per m², grain number per panicle, 1000-grain weight, biological yield, harvest index, grain N uptake across io-fertilizer applications and N rates. This study proved that bio-fertilizer application could reduce chemical N application rate with increase in rice grain yield

Source or Periodical Title

Philippine Journal of Crop Science

ISSN

0115-463x

Volume

40

Issue

1

Page

76-81

Document Type

Article

Frequency

tri-quarterly

Physical Description

tables, graphs

Language

English

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