https://www.alice.cnptia.embrapa.br/alice/handle/item/250 Artigo em periódico indexado (CNPMS) 2026-07-24T07:50:36Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188502 Título: Adjustment of the lime rate recommendation for the soybean-maize system in the Cerrado-Amazon transition region. Autoria: LANGE, A.; PINTO, A. C.; FREDDI, O. S.; MAGALHÃES, C. A. de S.; FURTINI NETO, A. E.; CONTESINI, M. E.; SOUSA, A. C. A. de Conteúdo: Liming is an essential practice for high productivity systems, but the recommended rates are often not enough to increase base saturation (V%) and to guarantee an extended residual effect. Thus, we aimed to evaluate, across three crops, soybean and maize productivity as well as chemical changes in the soil after lime rates above the recommended, in Querência, Mato Grosso, Brazil. Eight treatments were tested, combining dolomitic lime, calcitic lime and two ways of application (superficial or incorporated), in addition to a control group, in a randomized block design, with four replications. Lime rates were calculated through the base saturation method (aiming for V = 75%, 100% and 150%) or through increase of Ca and Mg percentages in the CECpH7 (60/20% and 75/25%). Liming significantly improved soil pH, Ca and Mg concentration, base saturation and participation of these cations in the CECpH7, reflecting in higher productivity of soybean and maize. The treatment with half of the rate incorporated and half superficial achieved better results. Therefore, lime rates above the traditionally recommended are viable, especially when part of it is incorporated, promoting lasting changes in soil fertility and increase of crop productivity. 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188493 Título: Bacillus from the Brazilian Caatinga biome enhances maize productivity and agronomic performance under rainfed conditions across multi-location field trials. Autoria: LANA, U. G. de P.; SOUSA, S. M. de; GODINHO, B. T. V.; FERREIRA, L. V. S.; OLIVEIRA-PAIVA, C. A.; AVELAR, J. V. S. A. de; MAGALHAES, P. C.; VASCONCELOS, J. C. S.; CANÇADO, G. M. de A.; GOMES, E. A. Conteúdo: Drought stress is among themost critical limitations to maize productivity, particularly under rainfed conditions. In this study, we explored the Brazilian Caatinga biome as a source of drought adapted plant growth-promoting bacteria and evaluated their potential to mitigate drought effects in maize (Zea mays L.). A total of 414 thermotolerant bacterial strains were isolated from soil, of which 28 Bacillus strains were able to grow under low water activity. These strains exhibited multiple plant growthpromoting traits in vitro, including exopolysaccharide production, biofilm formation, siderophore production, indole-3-acetic acid synthesis, putative nitrogen fixation, and phosphate solubilization. Twelve selected strains significantly improved root morphology, relative chlorophyll content (SPAD units), and biomass accumulation in maize seedlings under osmotic stress induced by polyethylene glycol. Notably, strain 1A11 showed the most consistent effects, promoting root growth and biomass accumulation under both stressed and non-stressed conditions, indicating constitutive growth promotion across environments, whereas other strains showed stronger responses under stress. This stability across environments strengthens its agronomic value, particularly in regions characterized by high rainfall variability. Genome sequencing of five elite strains (1A11, 5D5, 6E9, 1H10, and 2E7) identified conserved gene clusters associated with exopolysaccharide production, indole-3-acetic acid synthesis, phosphate metabolism, iron acquisition (siderophore synthesis), synthesis of volatile compounds, motility, chemotaxis, and general responses to osmotic and oxidative stress. Multi-location field trials conducted across five locations in Brazil, under rainfed conditions, indicate that strains 1A11 (Bacillus subtilis), 5D5, and 6E9 (Bacillus velezensis) consistently increased grain yield compared to the non-inoculated control and performed similarly to or better than a commercial inoculant. Mean productivity gains with the strain 1A11 reached up to 39% relative to the noninoculated treatment across environments. These results indicate that Bacillus strains isolated from semi-arid soils were able to convert multifunctional potential into measurable agronomic gains under field conditions, demonstrating their potential as bioinoculants to enhance maize resilience under water-limited agricultural systems. 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188501 Título: Competitive interaction of maize genotypes with different technologies in coexistence with wild poinsettia and Alexandergrass. Autoria: GALON, L.; BERNARDI, N. D. C.; CONCENÇO, G.; TONIN, R. J.; SILVA, A. F. da; TIRONI, S. P.; PERIN, G. F.; ASPIAZÚ, I.; SOARES, E. R. Conteúdo: Genetically modified maize hybrids, especially those resistant to herbicides, have been released in the Brazilian market. In this context, the study aimed to evaluate the competitive ability of three maize genotypes, 2B433 (Enlist®), Pioneer 30F53 (VYHR®), 13K288 PWE (Enlist®), and a control (conventional, non-transgenic) variety, with different biotechnological backgrounds, when competing with wild poinsettia (Euphorbia heterophylla) and Alexandergrass (Urochloa plantaginea). The experiment was a randomized block design with four replicates. Maize and competitors were studied at different plant proportions: 20:0; 15:5; 10:10; 5:15 and 0:20 plants per pot or 100:0; 75:25; 50:50; 25:75 and 0:100% (crop: weed) in replacement series experiments. Fifty days after emergence, stomatal conductance, transpiration rate, water use efficiency, relative chlorophyll content, as well as plant height and stem diameter were measured. The Enlist® technology maize genotypes (13K288 PWE and 2B433) showed better physiological and morphological performance compared to the conventional variety and 30F53 (VYHR®) when competing with Alexandergrass and wild poinsettia. It can be inferred that the increase in competitive capacity is due to the greater plant height of the 13K288 PWE (Enlist®) and 2B433 (Enlist®) genotypes. All maize genotypes were more competitive than the weeds, as indicated by the relative competitiveness indices. Based on these results, it can be inferred that there are differences between genotypes; however, further studies are needed to observe the relationship between competitive ability and the transgenic event. 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188495 Título: Inoculation and coinoculation of Azospirillum brasilense and Bacillus sp. in maize genotypes under water deficit. Autoria: REIS, C. O.; MAGALHAES, P. C.; SOUZA, I. R. P. de; ALMEIDA, L. G.; PAIVA, A. P. L. de; MARQUES, D. M. Conteúdo: Aiming to evaluate the effects of isolated and joint inoculation of rhizobacteria in corn hybrids under different water regimes, strains of Azospirillum brasilense and Bacillus sp. were inoculated in seeds of two maize hybrids with contrasting drought characteristics and exposed to Field Capacity and Water Deficit. During pre-flowering, the plants were kept under water deficit for 14 days. After this period, the root system morphology, relative leaf chlorophyll content, maximum quantum efficiency of photosystem II (PSII), and production parameters were analyzed. Regarding root morphological characteristics, the hybrids showed opposite responses: DKB390 increased all evaluated factors when inoculated with Azospirillum, whereas P30F53 did not. The inoculants promoted beneficial effects in maize genotypes under water-deficit conditions, resulting in increased grain production. Coinoculation promoted higher averages across all evaluated parameters for the drought-sensitive hybrid. In irrigated plants, the inoculant Azospirillum conferred higher chlorophyll content in both maize genotypes. Photosystem II inhibition was observed in plants exposed to water deficit after 7 days of stress; however, the inoculant Azospirillum showed higher values for both hybrids. Thus, these results suggest that the plant-bacteria interaction is linked to genetic material, as corn hybrids with divergent drought behaviors exhibit different responses to plant growth-promoting rhizobacteria (PGPR) inoculation. 2026-01-01T00:00:00Z