Initial performance of maize in response to NPK fertilization combined with Herbaspirillum seropedicae

Abstract

RESUMO Desempenho inicial do milho, em resposta à adubação NPK combinada com a inoculação de Herbaspirillum seropedicaeA inoculação de bactérias promotoras de crescimento de plantas pode ser uma abordagem tecnológica útil para aumentar a produção de milho. O objetivo deste trabalho foi avaliar o desempenho inicial de plantas de milho, em resposta à aplicação de doses de NPK combinadas com a inoculação da bactéria diazotrófica Herbaspirillum seropedicae, em experimento em casa de vegetação. A matriz experimental consistiu em seis níveis de adubação: 0, 25, 50, 75, 100 e 200 % da dose de NPK recomendada, aplicados em plantas de milho inoculadas e não inoculadas com H. seropedicae. Aos 30 dias após a aplicação dos tratamentos, foram avaliadas as características de crescimento e nutricionais das plantas. O crescimento do milho foi influenciado pela adubação, mas foi reforçado pela combinação com a bactéria, que resultou em aumentos significativos na matéria seca da parte aérea (7 %) e área foliar (9 %), quando comparado com as das plantas não inoculadas. Os resultados indicaram incrementos no acúmulo de N (11 %), P (30 %) The inoculation with plant growth-promoting bacteria can be a technological approach useful for increasing the production of maize. The objective of this study was to evaluate the initial performance of maize in response to application of doses of NPK combined with the inoculation of the diazotrophic bacteria Herbaspirillum seropedicae in an greenhouse experiment. The experiment consisted of six fertilizer levels: 0, 25, 50, 75, 100 and 200% of the recommended dose of NPK applied to maize inoculated and non-inoculated with H. seropedicae. At 30 days after the treatment application, the growth characteristics and nutritional status of the plants were evaluated. Plant development was influenced by fertilization, but it was enhanced by combination with the bacteria, which resulted in significant increases in the dry mass of shoots (7%) and leaf area (9%) when compared with non-inoculated plants. The results showed increases in the concentration of N (11%), P (30%) and K (17%) of maize plants in response to bacterial inoculation together with NPK compared with plants that were applied fertilize only. The greater consistency and stability response of the host plant to bacterization in the presence of chemical fertilizer indicate a promissory biotechnological approach for improving the initial growth and adaptation of maize to the cultivation environment.

Response of Some Maize Hybrids (Zea mays L.) To NPK Fertilization

“…The positive effect of increasing NPK fertilization on NPK uptake is mainly explained by the effect of NPK fertilizers on grain and stover yields as mentioned before in Table 2, where nutrient uptake was calculated by multiplying grains and stover yield by nutrient concentration (Ismail et al, 2006). These results are in accordance with those obtained by Baldotto et al (2012) and Hassanien (2018).…”

Advantages of Intercropping Soybean with Maize Under Two Maize Plant Distributions and Three Mineral Nitrogen Fertilizer Rates

“…IAA is a molecule that is synthesized by plants and a few microbes (Basse et al, 1996). These results are in agreement with those obtained by Baldotto et al (2012) who found that with increasing rates of fertilizers, there was a decrease in the root / shoot ratio, confirming the increased availability of nutrients in the root environment. Also, Pavlíková et al (2012) showed that N is a macronutrient present in many key biological molecules and it is available for plants predominantly as NO 3…”

Improvement in Soil Characteristics of Sandy Loam Soil and Grain Quality of Spring Maize by Using Phosphorus Solublizing Bacteria

“…As in the case of our study, PSB increased plant biomass but the activities of PSB towards P-solubilization in P-deficient soils could be different to different plant species and the prevailing environmental conditions [57,58]. One more phenomenon, i.e., production of organic acids by PSBs, enhances the P-mobilization/solubilization [59] in the sandy soil and finally enables the plant to uptake mineral nutrients [60]. In addition, the carboxylic groups of the acids increase the chelation of the cations, which further bind to phosphate and convert them into soluble forms [61,62].…”