Abstract：
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.
摘要：
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。
