Cheng Yingying, Shi Xiaojun, Narayanan Mathiyazhagan, Li Zhenlun, Li Yujia, Ma Ying
Chongqing Key Laboratory of Interface Process and Soil Health, College of Resources and Environment, Southwest University, Chongqing, China.
Center for Research and Innovations, Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical sciences (SIMATS), Chennai, India.
J Sci Food Agric. 2025 Jul;105(9):5030-5039. doi: 10.1002/jsfa.14233. Epub 2025 Mar 25.
The use of plant growth-promoting bacteria (PGPB) is a promising approach to improving crop nutrient management. This study used multiple biological nutrient indicators to identify efficient PGPB strains and to investigate their impacts on soil nutrient dynamics, crop growth, and nutrient uptake during the critical growth stages of Zea mays.
Two high-performing PGPB strains were selected based on their phosphate solubilization and growth-promotion potential. Pot experiments revealed that these strains enhanced soil nutrient characteristics significantly, including soil organic matter, alkaline-hydrolyzable N, and available K, thereby improving nutrient availability. In Z. mays, these strains increased total root length, root diameter, and number of root tips markedly, expanding the root system's nutrient absorption capacity. Without phosphorus (P) fertilizer, nitrogen uptake efficiency (NUE) and potassium uptake efficiency (KUE) increased by up to 34% and 25.43%, respectively, compared to the control. With P fertilizer, the maximum increases were 65.37% and 33.33%. In the absence of P fertilizer, combined inoculation enhanced nutrient uptake efficiency more than single inoculation (T1, T2), with NUE increasing by 14.04% and 10.29%, and KUE by 9.61% and 7.35%, respectively.
Both single and combined PGPB inoculations effectively enhanced Z. mays root architecture and activated essential soil nutrients, highlighting their potential in a sustainable approach to improve nutrient management and crop productivity. © 2025 Society of Chemical Industry.
利用植物促生细菌（PGPB）是改善作物养分管理的一种很有前景的方法。本研究使用多种生物养分指标来鉴定高效PGPB菌株，并研究它们在玉米关键生长阶段对土壤养分动态、作物生长和养分吸收的影响。
基于解磷能力和促生长潜力筛选出两株高性能PGPB菌株。盆栽试验表明，这些菌株显著改善了土壤养分特性，包括土壤有机质、碱解氮和速效钾，从而提高了养分有效性。在玉米中，这些菌株显著增加了总根长、根直径和根尖数量，扩大了根系的养分吸收能力。在不施磷肥的情况下，与对照相比，氮素吸收效率（NUE）和钾素吸收效率（KUE）分别提高了34%和25.43%。在施磷肥的情况下，最大增幅分别为65.37%和33.33%。在不施磷肥的情况下，联合接种比单一接种（T1、T2）更能提高养分吸收效率，NUE分别提高了14.04%和10.29%，KUE分别提高了9.61%和7.35%。
单一和联合接种PGPB均能有效改善玉米根系结构并激活土壤中的必需养分，突出了它们在以可持续方式改善养分管理和作物生产力方面的潜力。© 2025化学工业协会。
