该研究旨在开发一种使用短小芽孢杆菌的固体生物肥料，以生长素生产为重点，提高植物的耐旱性。方法涉及将短小芽孢杆菌固定在藻酸盐-淀粉珠中，专注于微生物浓度，生物聚合物类型，和环境条件。最佳配方的直径为3.58mm±0.18，在30°C干燥15小时后尺寸分布均匀，稳定的细菌浓度（室温下180天1.99×109CFUg-1±1.03×109），高生长素产量（7天内IAA为748.8µg-1±10.3），保水能力为37%±4.07。总之,这种海藻酸盐+淀粉+L-色氨酸+短小芽孢杆菌的新配方具有用于作物的潜力，由于其引人注目的保水性，在室温下储存的高活力，和高生长素产量，这提供了商业优势。
The study aimed to develop a solid biofertilizer using Bacillus pumilus, focusing on auxin production to enhance plant drought tolerance. Methods involved immobilising B. pumilus in alginate-starch beads, focusing on microbial concentration, biopolymer types, and environmental conditions. The optimal formulation showed a diameter of 3.58 mm ± 0.18, a uniform size distribution after 15 h of drying at 30 °C, a stable bacterial concentration (1.99 × 109 CFU g-1 ± 1.03 × 109 over 180 days at room temperature), a high auxin production (748.8 µg g-1 ± 10.3 of IAA in 7 days), and a water retention capacity of 37% ± 4.07. In conclusion, this new formulation of alginate + starch + L-tryptophan + B. pumilus has the potential for use in crops due to its compelling water retention, high viability in storage at room temperature, and high auxin production, which provides commercial advantages.
