Agronomic effectiveness of a granular poultry litter-derived organomineral phosphate fertilizer in tropical soils: Soil phosphorus fractionation and plant responses

Agronomic efficiency of organomineral fertilizer in sequential grain crops in southern Brazil

“…T A B L E 3 Shoot dry matter yields of beans, wheat (two harvests), and corn produced in response to fertilizers used (source followed by % recommended application rate) in a Humic Cambisol Organomineral, organic, and mineral fertilizers presented the same agronomic performance, corroborating the results found by other studies (Corrêa et al, 2018;Deeks et al, 2013;Frazão et al, 2019). These results indicate that possible differences in the nutrient-release dynamics do not influence the productivity of crops in the conditions studied.…”

The effect of different ceramic materials to improve hardness of organomineral fertilizer granules

“…The spectra of the bentonites 1, 2, and 3, respectively, are shown in the Figure 1A, B, and C, where it is possible to note that there are no significant differences between them, showing the bands in the 3621 cm −1 and 910 cm −1 regions, which are characteristic of this material, representing dioctahedral smectites. 9 The bands of 628 and 670 cm −1 are assigned to the Si-O-Al and Si-O-Mg. The bands in the 3446 and 1645 cm −1 regions are related to the OH frequencies of the water molecule.…”

“…The organomineral fertilizers (OMF) were produced in three steps, according to the method described in Frazao. 9 Firstly, the chicken litter was oven-dried at 60°C until constant weight, ground in an industrial mixer and sieved (60 mesh). Based on the four different concentrations of the additive material (0.5%, 1%, 2%, and 3% (w/w)) ( Table 1), was homogenized mixed manually with Monoammonium Phosphate (MAP) (35%) and completed the formulation with chicken litter until complete 100% of the weight.…”

“…The assays were performed in quadruplicates and conducted at room temperature (20 ± 2°C) under constant stirring at 50 rpm. Aliquots (1 mL) were withdrawn for analysis at defined intervals (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, and 30 minutes) to samples with 3% of the different additives and for samples containing different concentrations of magnesium oxide at defined intervals (1,2,3,4,5,6,7,8,9,10,11,16,21,26, and 31 min). The difference in volume was corrected in the calculations.…”

Lodo de esgoto como matriz orgânica na formulação de fertilizante organomineral para a cultura da soja

“…MORAIS & GATIBONI (2015) mostraram diferenças temporais nas atividades da β-glucosidase e da fosfatase ácida quando avaliaram o contraste entre um fertilizante mineral e outro organomineral (oriundo da cama de frango) na disponibilidade de P. Os autores concluíram que esse comportamento dinâmico se deve à quebra ("lise") das células e a subsequente liberação de enzimas ao longo do tempo, as quais podem ser complexadas pela fração coloidal dos solos. Portanto, fica claro que esses resultados controversos se devem à sensibilidade desses indicadores biológicos aos mais diversos estímulos (DICK, 1984;BETTIOL et al, 2006;CARNEIRO et al, 2009;MAGGIERO et al, 2011;FRAZÃO et al, 2019).…”