The ammonium excreting Azospirillum brasilense strain HM053: a new alternative inoculant for maize

Aims We evaluated the effect of Azospirillum brasilense strain HM053 inoculation on maize seeds, a spontaneous mutant that excrete ammonium and fix nitrogen constitutively. Methods Maize was grown with different nitrogen (urea) concentration and inoculated with A. brasilense Ab-V5 (Brazilian commerc...

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Bibliographic Details
Published in:	Plant and soil Vol. 451; no. 1-2; pp. 45 - 56
Main Authors:	Pedrosa, F. O., Oliveira, A. L. M., Guimarães, V. F., Etto, R. M., Souza, E. M., Furmam, F. G., Gonçalves, D. R. P., Santos, O. J. A. P., Gonçalves, L. S. A., Battistus, A. G., Galvão, C. W.
Format:	Journal Article
Language:	English
Published:	Cham Springer International Publishing 01-06-2020 Springer Springer Nature B.V
Subjects:	Ammonium Azospirillum brasilense Biofertilizers Biomedical and Life Sciences Corn Crop yield Crop yields Ecology Fertilization Field tests Inoculation Life Sciences Nitrogen Nutrient content Plant Physiology Plant Sciences Regular Article Rondon, Cândido Mariano da Silva Seeds Soil Science & Conservation Sustainable agriculture Urea Brazil Plant growth promoting bacteria Poaceae Sustainable agriculture, biofertilizer, diazotrophic bacteria Plant-Bacteria interaction
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Summary:	Aims We evaluated the effect of Azospirillum brasilense strain HM053 inoculation on maize seeds, a spontaneous mutant that excrete ammonium and fix nitrogen constitutively. Methods Maize was grown with different nitrogen (urea) concentration and inoculated with A. brasilense Ab-V5 (Brazilian commercial strain) or HM053 strain in four field experiments, in three regions of Parana State, Southern Brazil. We evaluated yield components, nutrient content on leaves and grains and productivity during the crop cycle. Results Inoculation with A. brasilense strain Ab-V5 and HM053 associated with base fertilization (30 kg ha −1 N) improved crop yield in all trials. Ab-V5 increased production between 2.2 to 10.4%, or 178.0 to 759.9 kg ha −1 , respectively. HM053, by itself, increased production between 4.7 to 29%, or 460.5 to 1769.3 kg ha −1 , respectively. Conclusion The new strain HM053 showed to be a great biofertilizer for maize seeds and a new alternative for a more sustainable agriculture.
ISSN:	0032-079X 1573-5036
DOI:	10.1007/s11104-019-04124-8