Maize Grain Yield Response to Variable Row Nitrogen Fertilization

Edmonds, Daniel E.; Tubaña, Brenda; Kelly, Jonathan P.; Crain, Jared; Edmonds, Matthew D.; Solie, John B.; Taylor, Randal K.; Raun, W. R.

doi:10.1080/01904167.2011.585198

Cited by 9 publications

(6 citation statements)

References 14 publications

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“…Among the abiotic factors, N deficit is seen as one of the main limiting factors, since N is not only the most demanded nutrient but also the element with greatest influence on maize productivity [10]. Although maize depends heavily on N fertilization, the nitrogen use efficiency (NUE), in other words, grain yield or biomass produced per unit of soil available N, is estimated at < 50% [11,12]. According to Ladha et al [2], the two most promising strategies to reduce dependence on N fertilization in maize cultivation are: i) develop plants with increased NUE and ii) application of associative diazotrophic bacteria to improve non-symbiotic N fixation.…”

Section: Introductionmentioning

confidence: 99%

Azospirillum brasilense promotes increases in growth and nitrogen use efficiency of maize genotypes

et al. 2019

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The development of cultivars with an improved nitrogen use efficiency (NUE) together with the application of plant growth-promoting bacteria is considered one of the main strategies for reduction of fertilizers use. In this sense, this study: i) evaluated the effect of Azospirillum brasilense on the initial development of maize genotypes; ii) investigated the influence of A . brasilense inoculation on NUE under nitrogen deficit; and iii) sought for more NUE genotypes with higher responsiveness to A . brasilense inoculation. Twenty-seven maize genotypes were evaluated in three independent experiments. The first evaluated the initial development of maize genotypes with and without A . brasilense (strain Ab-V5) inoculation of seeds on germination paper in a growth chamber. The second and third experiments were carried out in a greenhouse using Leonard pots and pots with substrate, respectively, and the genotypes were evaluated at high nitrogen, low nitrogen and low nitrogen plus A . brasilense Ab-V5 inoculation. The inoculation of seeds with A . brasilense Ab-V5 intensified plant growth, improved biochemical traits and raised NUE under nitrogen deficit. The inoculation of seeds with A . brasilense can be considered an economically viable and environmentally sustainable strategy for maize cultivation.

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Section: Introductionmentioning

confidence: 99%

Azospirillum brasilense promotes increases in growth and nitrogen use efficiency of maize genotypes

et al. 2019

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“…the yield obtained per unit of available N in the soil (supplied by the soil + N fertilizer), is typically less than 50% [2,3]. On this basis, improving NUE is particularly relevant for maize and a major challenge for sustainable agriculture [4–6].…”

Section: Introductionmentioning

confidence: 99%

Metabolic profiling of two maize (Zea mays L.) inbred lines inoculated with the nitrogen fixing plant-interacting bacteria Herbaspirillum seropedicae and Azospirillum brasilense

et al. 2017

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Maize roots can be colonized by free-living atmospheric nitrogen (N2)-fixing bacteria (diazotrophs). However, the agronomic potential of non-symbiotic N2-fixation in such an economically important species as maize, has still not been fully exploited. A preliminary approach to improve our understanding of the mechanisms controlling the establishment of such N2-fixing associations has been developed, using two maize inbred lines exhibiting different physiological characteristics. The bacterial-plant interaction has been characterized by means of a metabolomic approach. Two established model strains of Nif+ diazotrophic bacteria, Herbaspirillum seropedicae and Azospirillum brasilense and their Nif- couterparts defficient in nitrogenase activity, were used to evaluate the impact of the bacterial inoculation and of N2 fixation on the root and leaf metabolic profiles. The two N2-fixing bacteria have been used to inoculate two genetically distant maize lines (FV252 and FV2), already characterized for their contrasting physiological properties. Using a well-controlled gnotobiotic experimental system that allows inoculation of maize plants with the two diazotrophs in a N-free medium, we demonstrated that both maize lines were efficiently colonized by the two bacterial species. We also showed that in the early stages of plant development, both bacterial strains were able to reduce acetylene, suggesting that they contain functional nitrogenase activity and are able to efficiently fix atmospheric N2 (Fix+). The metabolomic approach allowed the identification of metabolites in the two maize lines that were representative of the N2 fixing plant-bacterial interaction, these included mannitol and to a lesser extend trehalose and isocitrate. Whilst other metabolites such as asparagine, although only exhibiting a small increase in maize roots following bacterial infection, were specific for the two Fix+ bacterial strains, in comparison to their Fix- counterparts. Moreover, a number of metabolites exhibited a maize-genotype specific pattern of accumulation, suggesting that the highly diverse maize genetic resources could be further exploited in terms of beneficial plant-bacterial interactions for optimizing maize growth, with reduced N fertilization inputs.

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“…Moreover it has been reported than an excessive application of N fertilizers can even lead to a decrease in grain yield [ 14 , 15 ]. Thus, improving NUE is particularly relevant for maize, for which global NUE has been estimated to be less than 50% [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Conversion to No-Till Improves Maize Nitrogen Use Efficiency in a Continuous Cover Cropping System

et al. 2016

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A two-year experiment was conducted in the field to measure the combined impact of tilling and N fertilization on various agronomic traits related to nitrogen (N) use efficiency and to grain yield in maize cultivated in the presence of a cover crop. Four years after conversion to no-till, a significant increase in N use efficiency N harvest index, N remobilization and N remobilization efficiency was observed both under no and high N fertilization conditions. Moreover, we observed that grain yield and grain N content were higher under no-till conditions only when N fertilizers were applied. Thus, agronomic practices based on continuous no-till appear to be a promising for increasing N use efficiency in maize.

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Maize Grain Yield Response to Variable Row Nitrogen Fertilization

Cited by 9 publications

References 14 publications

Azospirillum brasilense promotes increases in growth and nitrogen use efficiency of maize genotypes

Azospirillum brasilense promotes increases in growth and nitrogen use efficiency of maize genotypes

Metabolic profiling of two maize (Zea mays L.) inbred lines inoculated with the nitrogen fixing plant-interacting bacteria Herbaspirillum seropedicae and Azospirillum brasilense

Conversion to No-Till Improves Maize Nitrogen Use Efficiency in a Continuous Cover Cropping System

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