The intensification of global agriculture results in significant disposal challenges, with 14 billion tons of crop straw and 125 million tons of livestock manure produced annually. Traditional composting often fails due to low lignocellulose degradation efficiency and the persistence of pathogens and antibiotic resistance genes (ARGs). Additionally, the use of antibiotics, like oxytetracycline in livestock, increases the transmission of these ARGs and pathogens in soil-plant systems, threatening agricultural safety and the environment.
To tackle this issue, a research team from the Kunming Institute of Botany of the Chinese Academy of Sciences (CAS) has employed microbial conversion technology to create a closed-loop system that links crop straw, livestock manure, and spent mushroom substrates, promoting the green and efficient use of organic matter to support crop growth. The paper is published in the journal Environmental Science & Technology.
Taking advantage of Yunnan’s abundant agronomic organic matter and fungal resources, the team selected the rare edible mushroom Stropharia rugosoannulata as the core conversion medium to construct a Livestock-Crop-Mushroom (LCM) cross-domain circular system.