Grain, milling, and head rice yields as affected by nitrogen rate and bio-fertilizer application

Acta agriculturae Slovenica

Saeed FIROUZI¹ 

[1]Department of Agronomy and Plant Breeding, Rasht Branch, Islamic Azad University, Rasht, Iran

关键词: rice;    oryza;    nitrogen fertilizers;    rhizobacteria;    azotobacter;    Azospirillum;    plant growth stimulants;    growth;    crop yield;   

DOI  :  10.14720/aas.2015.105.2.07

学科分类：农业科学（综合）

来源: Univerza v Ljubljani * Biotehniska Fakulteta / University of Ljubljana * Biotechnical Faculty

【 摘 要 】

To evaluate the effects of nitrogen rate and bio-fertilizer application on grain, milling, and head rice yields, a field experiment was conducted at Rice Research Station of Tonekabon, Iran, in 2013. The experimental design was a factorial treatment arrangement in a randomized complete block with three replicates. Factors were three N rates (0, 75, and 150 kg ha -1 ) and two bio-fertilizer applications (inoculation and uninoculation with Nitroxin, a liquid bio-fertilizer containing Azospirillum spp. and Azotobacter spp. bacteria). Analysis of variance showed that rice grain yield, panicle number per m 2 , grain number per panicle, flag leaves area, biological yield, grains N concentration and uptake, grain protein concentration, and head rice yield were significantly affected by N rate, while bio-fertilizer application had significant effect on rice grain yield, grain number per panicle, flag leaves area, biological yield, harvest index, grains N concentration and uptake, and grain protein concentration. Results showed that regardless of bio-fertilizer application, rice grain and biological yields were significantly increased as N application rate increased from 0 to 75 kg ha -1 , but did not significantly increase at the higher N rate (150 kg ha -1 ). Grain yield was significantly increased following bio-fertilizer application when averaged across N rates. Grains N concentration and uptake were significantly increased as N rate increased up to 75 kg ha -1 , but further increases in N rate had no significant effect on these traits. Bio-fertilizer application increased significantly grains N concentration and uptake, when averaged across N rates. Regardless of bio-fertilizer application, head rice yield was significantly increased from 56 % to 60 % when N rate increased from 0 to 150 kg ha -1 . Therefore, this experiment illustrated that rice grain and head yields increased with increasing N rate, while bio-fertilizer application increased only rice grain yield .

【 授权许可】

Unknown