Nitrogen translocation in wheat inoculated with Azospirillum and fertilized with nitrogen

Pesquisa Agropecuária Brasileira

Osmar Rodrigues²  Agostinho Dirceu Didonet¹  Jorge A. Gouveia¹  Rita De CÁssia Soares¹ 

[1] ,Empresa Brasileira de Pesquisa Agropecuária Centro Nacional de Pesquisa de Trigo Passo Fundo RS

关键词: Triticum aestivum;    nitrogen fertilization;    nitrogen metabolism;    assimilation;    nitrogen fixing bacteria;    Triticum aestivum;    adubação nitrogenada;    metabolismo do nitrogênio;    assimilação;    bactéria fixadora de nitrogênio;   

DOI  :  10.1590/S0100-204X2000000700023

来源: SciELO

【 摘 要 】

The productivity and the translocation of assimilates and nitrogen (N) were compared after inoculation of wheat (Triticum aestivum L., cv. BR-23) seeds with two strains of Azospirillum brasilense (strains 245 and JA 04) under field conditions. The inoculation of wheat seeds was done with a peat inoculant at sowing time. Plant material for evaluations were collected at anthesis and maturity. No differences in grain yield and in the translocation of assimilates resulting from inoculation were detected. Differences were observed in relation to N rates (0, 15, and 60 kg ha-1). N content in the grain increased significantly in the bacteria-inoculated treatments in which N was not added. This increase in N content in the grain with inoculation was probably due to higher N uptake after anthesis without any significant contribution on the grain yield. Such increment was of 8.4 kg ha-1 of N representing 66% more N than in no inoculated treatment. Regardless of the inoculation and the rate of N applied, it was observed that about 70% of the N accumulated at anthesis was translocated from vegetative parts to the grain.

【 授权许可】

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