PDF | The corn crop is one of the most cultivated in the world and of corn crop, in function of foliar Azospirillum brasilense inoculation, associated with nitrogen doses. capacidade de expansão do grão em milho-pipoca. Inoculação de Azospirillum brasilense e doses de nitrogênio em milho para In this context, the use of bacteria of the genus Azospirillum brasilense appears. inoculation with Rhizobium tropici in the absence of N fertilization was efficient Crescimento do milho em resposta a Azospirillum brasilense.
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Leaf chlorophyll content is used to predict the nutritional level of N in plants, and the content of this pigment is positively correlated with N content Piekielek et al.
Agronomy Journal, Madison, v. This study aimed at evaluating the effects of an inoculant with Azospirillum brasilense on the growth and yield of secondharvest maize. The biological nitrogen fixation is an alternative to supply the nitrogen needed for maize. Several reports in the literature discuss the capacity of Azospirillum to produce phytohormones that stimulate root growth in several plant species Dobbelaere et al. The experimental plots consisted of 12 lines 12 m long, with 0.
There was evaluated the height of ear insertion, total plant height, leaf N content, shoot dry biomass and grain yield.
Cambridge, Cambridge University Press. The leaf-inoculant spray was comprised of 5 doses mL of the inoculant diluted in 50 L ha -1 of water.
Responses of agronomically important crops to inoculation with Azospirillum Australian. It is observed that in the absence of nitrogen application in sowing the inoculation of Azospirillum spp.
There is also a wide variety of results in the literature regarding the relationship between inoculation and nitrogen fertilization. All the contents of this journal, except where azospirillkm noted, is licensed under a Creative Commons Attribution License. azoapirillum
Inoculation with Azospirillum, associated with nitrogen fertilization in maize
How to cite this article. The parameters assessed included: It is possible to observe a greater abundance and longer root lengths in the treatments inoculated with strains of Azospirillum brasiliense Figure 2.
It was found that, azospirilum for shoot dry biomass and for yield, the inoculation with Azospirillum spp.
Biomass was zaospirillum in leaves, stalks and ears collected from a linear meter of each plot. No significant impacts on ear size were observed for different N doses, independently of the treatment.
The aozspirillum is located in a hot, tropical sub-humid zone, which has two distinct seasons and experiences significant annual variations in humidity, temperature and rainfall. The regression analyses generated a linear milhp for both traits, with different functions depending on the inoculation treatment Figures 3a and 3b. Trait Seeds Leaf-spray Control Shoot biomass g 1, It can also be noted on Table 3 that without the application of nitrogen topdressing fertilization, seed inoculation with Azospirillum significantly increased the production of shoot dry biomass in According to Embrapathe soil in the experimental area is classified as a Distroferric Red Latosol Oxisol and is composed of g kg -1 of clay, 75 g kg -1 of silt and g kg -1 of sand.
Barros Netowhen working with maize subjected to nitrogen fertilization levels and kg ha azospirillu of N and inoculation of product based on A. The experimental design in both experiments was a randomized complete block, with four replications, 2x2x2 factorial, with two levels of nitrogen at sowing zero and 20 kg ha -1two levels of inoculum zero and milgo ha -1 and two levels of nitrogen in topdressing zero and kg ha Thus, the objective of this work azospirilluum to evaluate the development and yield of maize in response to inoculation with Azospirillum spp.
Os efeitos das doses de N foram significativos apenaspara massa de 1. Dalla Santa et al.
The authors argued that the chlorophyll content responded to the increase asospirillum N because this nutrient participates directly in the biosynthesis of proteins and chlorophyll. Azospirilum inoculation increases maize height and stem diameter, chlorophyll content and dry biomass weight for the shoot and root system, as well as 1,grain weight, ear length and grain yield, when the maize is inoculated via seed or leaf. The results for stem diameter growth at 30 and 60 days after sowing are presented in Table 3.
Amaral Filho et al. These results agree with those obtained by Quadroson the other hand, Barros Neto found that the variation of the amount of nitrogen applied in topdressing kg mulho -1 and kg ha -1 had azospirilluj effect on maize yield, whose seeds were inoculated with pre-commercial product based on Azospirillum brasilense.
In order to do so, a measurement ruler was used for surveying. This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The regression analyses indicate a growing response to treatments with increasing doses of N for weight of 1, seeds. The highest grain yields were obtained with increasing N doses. Inoculated plants showed a greater growth for height 9. Characterization of diazotrophic bacteria associated with maize: Inoculation with selected strains of Azospirillum brasilense and A. The misuse of fertilizers has become a growing concern in terms of agricultural and environmental sustainability.
By the other hand, it is agreed that plant genotype is the key factor to obtain the benefits derived from biological nitrogen fixation, combined with the selection of efficient strains.
In this case, it is possible to consider that the incorporation of higher amount of nitrogen fertilizer azospirlllum soil, due to topdressing fertilization, has undermined the effect of inoculation. Australian Journal of Plant Physiology,