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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Based on the mean moisture content of the sample, the dry biomass produced in each plot was calculated, then extrapolating to kg ha Centro Nacional de Pesquisa de Solos.
Significant effect was observed with respect to inoculation with Azospirillum brasilense. Services on Demand Journal. Throughout the experiment, the mean monthly rainfall was monitored on a daily basis Figure 1.
Agronomy Journal, Madison, v. The dataset was subjected to an analysis of variance using the Biostat 5. To obtain the usable area, the two side lines and 0. 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 Plant height and ear insertion height were not modified by N fertilization and inoculation at both sites Table 2which can be attributed to genetic characteristics of each hybrid, a result also found by Campos et al.
Hartmann A Ecophysiological aspects of growth and nitrogen fixation in Azospirillum spp.
Os efeitos das doses de N wm significativos apenaspara massa de 1. It is categorized as hot and humid AWwith rainy summers and dry winters.
There was no statistical difference in this stage of development for doses of mineral N at 60 days. Three inoculation levels were tested: The application of nitrogen, in topdressing azospiri,lum sowing, has positively influenced shoot dry biomass, as well as productivity, and base nitrogen fertilization has also provided an increase in leaf N content of plants Table 5.
On the other hand, the associations between inoculation and nitrogen fertilization, base or topdressing, have caused a reduction in leaf N content. In order to azosirillum so, a measurement ruler was used for surveying. There was evaluated the height of ear insertion, total plant height, leaf N content, shoot dry biomass and grain yield. Quadrosin an experiment under tillage with the intent to assess the inoculation of maize genotypes with Azospirillum spp.
Dalla Santa et al. Two experiments were conducted in azkspirillum field on the summer harvest.
Seed inoculation with Azospirillum brasilenseassociated with the use of bioregulators in maize. Within this group, the genus Azospirillum stands out. It is possible to observe a greater abundance and longer root lengths in the treatments inoculated with strains of Azospirillum brasiliense Figure 2. As for the grain yield, the addition of 1. This study aimed at evaluating the effects of an inoculant with Azospirillum brasilense on the growth and yield of secondharvest maize.
Inoculation with Azospirillum, associated with nitrogen fertilization in maize
Brazilian Xzospirillum of Biology and TechnologyCuritiba, v. Inoculation with Azospirillumassociated with nitrogen fertilization in maize. The leaf-inoculant spray azoospirillum comprised of 5 doses mL of the inoculant diluted in 50 L ha -1 of water. Inoculations were applied in combination with cover doses of mineral N. Increases in the production of shoot dry azospirillmu and yield provided by inoculation in this study could be attributed to the stimulus that A.
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 ha -1 and kg ha -1 had no effect on maize yield, whose seeds were inoculated with pre-commercial product based on Azospirillum brasilense.
The highest yield was associated with the highest doses of nitrogen. The biological nitrogen fixation is an alternative to supply the nitrogen mi,ho for maize. Data were collected from five plants along azospriillum central lines in a 20 m 2 working area within each plot.
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. No significant difference was observed in chlorophyll content among treatments, at 30 days after sowing Table 4. Nitrogen milno at sowing has increased leaf N content; however, when complemented by inoculation, it caused a reduction of such a variable. The effects of N fertilization are only visible in relation to 1,grain weight and grain yield kg ha -1and seed inoculations provide a higher yield in second-harvest maize.
Nitrogen topdressing fertilization, associated with inoculation, has reduced productivity and shoot dry biomass production Table 5. Despite this increase in relation to control, the azosoirillum values obtained in this experiment are inferior to kg ha -1 estimated for the hybrid AG YG for a population of 55 to 60 thousand plants per hectare.
The initial increase in the stem diameter of plants subjected to inoculation may be associated with the production of phytohormones Moreira et al.