Construction and Functional Validation of a Cross-Niche Multifunctional Microbial Consortium for Straw-Returning Agricultural Systems
Shu Jia, Hang Qu, Bo Li, Jin Chu, Yinghua Juan, Yuehua Xing, Yan Liu, Hongjing Bao, Wentao Sun
TL;DR
Scientists created a microbial group that helps break down straw in farming, improving soil and crop yields while reducing disease.
Contribution
A novel microbial consortium with complementary enzymes was developed to enhance straw decomposition and crop yield in sustainable farming.
Findings
The microbial consortium increased rice straw degradation by 37.18% and nitrogen release by 16.13%.
It inhibited Magnaporthe oryzae by 67.56%, reducing blast disease incidence and index.
Field trials showed a 9.63% increase in rice grain yield when the consortium was applied alone.
Abstract
Straw returning, a core practice in conservation tillage, promotes sustainable intensification; however, it faces challenges such as inefficient decomposition, nutrient competition, and pathogen accumulation. To address these limitations, this study aimed to develop a multifunctional microbial consortium specifically designed for straw-incorporating cropping systems. The consortium comprises four Bacillus strains with complementary enzymatic systems, isolated from diverse ecological niches. It exhibited robust lignocellulolytic enzyme production, with manganese peroxidase (7709.33 U/L), laccase (450.65 U/L), endo-β-1,4-glucanase (154.67 U/mL), and filter paper activity (309.18 U/L). The consortium significantly enhanced rice straw degradation by 37.18% and increased nitrogen (N) release by 16.13% compared to the control. Moreover, the consortium exhibited a 67.56% inhibition rate…
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Taxonomy
TopicsEnzyme-mediated dye degradation · Soil Carbon and Nitrogen Dynamics · Microbial Metabolism and Applications