Rosa Poliana Aparecida Leonel, Galindo Fernando Shintate, Oliveira Carlos Eduardo da Silva, Jalal Arshad, Mortinho Emariane Satin, Fernandes Guilherme Carlos, Marega Evelyn Maria Rocha, Buzetti Salatiér, Teixeira Filho Marcelo Carvalho Minhoto
Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira 15345-000, Brazil.
Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba 13416-000, Brazil.
Microorganisms. 2022 Jan 17;10(1):192. doi: 10.3390/microorganisms10010192.
Phosphorus (P) is a critical nutrient for high sugarcane yields throughout its cultivation cycles, however, a higher amount of P becomes rapidly unavailable to plants due to its adsorption to soil colloids. Some plant growth-promoting bacteria (PGPBs) may be able to enhance P availability to plants and produce phytohormones that contribute to crop development, quality, and yield. Thus, this study aimed to evaluate leaf concentrations of nitrogen (N) and P, yield, and technological quality of sugarcane as a function of different levels of phosphate fertilization associated with inoculation of PGPBs. The experiment was carried out at Ilha Solteira, São Paulo-Brazil. The experimental design was randomized blocks with three replications, consisting of five phosphorus rates (0, 25, 50, 75, and 100% of the recommended PO rate) and eight inoculations, involving three species of PGPBs (, and ) which were applied combined or in a single application into the planting furrow of RB92579 sugarcane variety. The inoculation of and provided a higher concentration of leaf P in sugarcane. The PO rates combined with inoculation of bacteria alter technological variables and stalk yield of sugarcane. The excess and lack of phosphate fertilizer is harmful to sugarcane cultivation, regardless of the use of growth-promoting bacteria. We recommend the inoculation with + associated with 45 kg ha of PO aiming at greater stalk yield. This treatment also increases sugar yield, resulting in a savings of 75% of the recommended PO rate, thus being a more efficient and sustainable alternative for reducing sugarcane crop production costs.
磷（P）是甘蔗整个种植周期实现高产的关键养分，然而，由于其吸附到土壤胶体上，大量的磷会迅速变得无法被植物利用。一些植物促生细菌（PGPBs）或许能够提高植物对磷的利用率，并产生有助于作物生长发育、品质提升和产量提高的植物激素。因此，本研究旨在评估与接种PGPBs相关的不同磷肥施用量对甘蔗叶片氮（N）和磷浓度、产量及工艺品质的影响。该实验在巴西圣保罗州伊利亚索尔泰拉进行。实验设计为随机区组，重复三次，包括五个磷施用量水平（推荐施磷量的0%、25%、50%、75%和100%）和八种接种处理，涉及三种PGPBs（、和），它们以组合或单次施用的方式施用于RB92579甘蔗品种的种植沟中。接种和可使甘蔗叶片中的磷浓度更高。磷肥施用量与细菌接种相结合会改变甘蔗的工艺变量和茎产量。无论是否使用促生细菌，磷肥过量和不足对甘蔗种植都是有害的。我们建议接种 + 并配合45 kg/ha的磷肥施用量，以实现更高的茎产量。这种处理方式还能提高糖分产量，从而节省75%的推荐磷肥施用量，因此是降低甘蔗生产成本的一种更高效且可持续的选择。
