Organomineral phosphate fertilizers (OMP) may reduce phosphate release rate and its direct contact to the soil solid phase, increasing the effectiveness of phosphorus (P) fertilization. This study aimed to evaluate the effect of granulating biochar (BC) with triple superphosphate (TSP) in two forms (blend or coated) and three proportions (5, 15 and 25%, w/w) on the P release kinetics and plant growth. A successive plant trial using two soils of contrasting P buffering capacities and five P doses (0, 20, 40, 80 and 120 mg kg⁻¹) was set to investigate the agronomic effectiveness of OMP that presented the slowest P release kinetic. The kinetic test showed that within the first 1.5 h, TSP, OMP blend and OMP coated fertilizers released 92, 82 and 36% of total P, respectively. Thereby, BC addition to TSP reduced the P release rate, mainly due to coating. The fertilizers coated with 15% and 25% BC (C15 and C25, respectively) presented the slowest P release rate. For the plant trial, C15 was chosen because it requires less BC when compared with C25 fertilizer. In the first crop, C15 provided more P to plants, especially in the soil with high P buffering capacity, which increased by 10% and 20% the P uptake and the P recovered by the plant when compared with TSP, respectively. In the sandy soil, fertilizers C15 and TSP showed the same performances regarding yield, P uptake and P recovery rate. At consecutive cultivation, regardless of the soil type, P sources (C15 and TSP) did not differ in yield, P uptake and P recovery. Therefore, biochar-based organomineral phosphate fertilizer can enhance P use efficiency in high P-fixing tropical soils, increasing P recovery and uptake when compared with TSP.

有机体磷肥（OMP）可能会降低磷的释放速率及其与土壤固相的直接接触，从而提高磷（P）施肥的效率。这项研究旨在评估将生物炭（BC）与三重过磷酸钙（TSP）以两种形式（共混或包衣）和三种比例（5％，15％和25％，w / w）制粒对磷释放动力学和植物生长的影响。使用两种具有不同P缓冲能力的土壤和五种P剂量（0、20、40、80和120 mg kg ^-1的连续植物试验）用于研究OMP的农艺效果，该蛋白表现出最慢的P释放动力学。动力学测试表明，在开始的1.5小时内，TSP，OMP掺和的OMP肥料分别释放了总磷的92％，82％和36％。因此，BC在TSP中的添加降低了P的释放速率，这主要归因于涂覆。施用15％和25％BC（分别为C15和C25）的肥料呈现出最慢的P释放速率。在植物试验中，选择C15是因为与C25肥料相比，它需要更少的BC。在第一批作物中，C15为植物提供了更多的磷，尤其是在具有高磷缓冲能力的土壤中，与TSP相比，植物吸收的磷和回收的磷分别增加了10％和20％。在沙质土壤中，肥料C15和TSP在产量方面表现出相同的性能，磷的吸收和磷的回收率。在连续耕种时，无论土壤类型如何，磷源（C15和TSP）的产量，磷吸收量和磷回收率均无差异。因此，与TSP相比，基于生物炭的有机矿物磷酸盐肥料可以在高P固位热带土壤中提高P的利用效率，提高P的回收和吸收。