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ORIGINAL RESEARCH article

Front. Plant Sci.
Sec. Plant Nutrition
Volume 15 - 2024 | doi: 10.3389/fpls.2024.1405527
This article is part of the Research Topic Application and Mechanism of Plant Biostimulants, Biochar, Fertilizer Products, and Other Nutrition-related Agrochemicals View all 22 articles

Hydrolysis products of agricultural waste can serve as microbial fertilizer enhancers to promote the growth of maize crops

Provisionally accepted
Yu Xu Yu Xu 1Wei Wang Wei Wang 2He Wang He Wang 1Yinping Tian Yinping Tian 1政府 岳 政府 岳 3*Cheng Li Cheng Li 1Yuefeng Wang Yuefeng Wang 1Jing Zhang Jing Zhang 4
  • 1 Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang, China
  • 2 Nanjing Agricultural University, Nanjing, Jiangsu Province, China
  • 3 Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
  • 4 School of Tropical Medicine, Hainan Medical University, Haikou, Hainan Province, China

The final, formatted version of the article will be published soon.

    Efficient utilization of agricultural wastes and reduction of chemical fertilizer inputs are crucial for sustainable development of agriculture. Plant growth promoting rhizobacteria (PGPR) are widely used as biofertilizers to partially replace chemical fertilizers in agricultural production. The functional performance of PGPR strains is closely related to their root colonization capacity. Some organic acids from root exudates can recruit PGPR to colonize the root. In this study, agricultural organic wastes such as mushroom bran and tobacco waste materials were used to produce organic acids through the hypoxic hydrolysis process. The hydrolysis conditions were optimized to maximize the production of a mixture of complex organic acids from the hypoxic hydrolysis of these materials, employing both single-factor and orthogonal experimental methods. The diluted hydrolysates were tested for their effects on the rhizosphere colonization of the PGPR strain Bacillus amyloliquefaciens SQR9 using fluorogenic quantitative PCR in greenhouse pot experiments. The results demonstrated that hypoxic hydrolysates from tobacco waste and mushroom bran significantly enhanced the colonization of SQR9 in the maize rhizosphere. Specifically, a 2000-fold dilution of tobacco waste hydrolysate yielded the most effective result, while a 5000fold dilution of mushroom bran hydrolysate provided the best outcome. All treatments combining these hydrolysates with SQR9 significantly increased maize stem dry weight, indicating that with appropriate treatment, such as anaerobic fermentation, these agricultural organic wastes can serve as synergistic agents of microbial fertilizers, contributing to agricultural sustainability.

    Keywords: Agricultural wastes, Organic acids, Hypoxia hydrolysate, PGPR, root

    Received: 23 Mar 2024; Accepted: 30 Sep 2024.

    Copyright: © 2024 Xu, Wang, Wang, Tian, 岳, Li, Wang and Zhang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: 政府 岳, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.