Nano molybdenum trioxide-mediated enhancement of soybean yield through improvement of rhizosphere soil molybdenum bioavailability for nitrogen-fixing microbial recruitment
文献类型： 外文期刊
第一作者： Li, Qibiao
作者： Li, Qibiao;Huang, Kan;Liu, Zhichen;Qin, Xiaoming;Liu, Yining;Tan, Qiling;Hu, Chengxiao;Sun, Xuecheng;Sun, Xuecheng;Sun, Xuecheng
作者机构：
关键词： MoO3 NPs; Rhizosphere soil; Available Mo; Nitrogen-fixing bacteria; Soybean
期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：8.2； 五年影响因子：8.6 ）
ISSN： 0048-9697
年卷期： 2024 年 937 卷
页码：
收录情况： SCI
摘要： Molybdenum (Mo) plays a pivotal role in the growth and nitrogen-fixing process of plants mediated by rhizobia. However, the influence of nano-molybdenum trioxide (MoO(3)NPs) on soybean growth, rhizosphere bioavailable Mo, and nitrogen-fixing microorganisms remains underexplored. Here, we report that compared with that of ionic Mo and bulk MoO3, the utilization of MoO(3)NPs (specifically NPs0.05 and NPs0.15) significantly boosted the available Mo content in the rhizosphere soil throughout the seedling (by 21.64 %-101.38 %), podding (by 54.44 %-68.89 %), and mature stage (by 34.41 %-to 45.71 %) of soybean growth. Furthermore, both NPs0.05 and NPs0.15 treatments maintained consistently higher levels of acid-extractable Mo, reducible Mo, and oxidizable Mo across these stages, which facilitated stable conversion and supply of bioavailable Mo. Within the rhizosphere soil, NPs0.05 and NPs0.15 treatments resulted in the highest relative abundance of Rhizobiales and Bradyrhizobium genera, and significantly promoted the colonization of nitrogen-fixing microorganisms, thereby increasing the content of nitrate nitrogen (NO3--N) by 8.69 % and 7.72 % and ammonium nitrogen (NH4+-N) by 44.75 % and 17.55 %, respectively. Ultimately, these effects together contributed to 107.17 % and 84.00 % increment in soybean yield by NPs0.05 and NPs0.15 treatments, respectively. In summary, our findings underscore the potential of employing MoO(3)NPs to promote plant growth and maintain soil nitrogen cycling, indicating distinct advantages of MoO(3)NPs over ionic Mo and bulk MoO3.
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