Facultad de Agronomía y Veterinaria, Universidad Autónoma de San Luis Potosí, Soledad de Graciano Sánchez, SLP, México.
, San Luis Potosí, SLP, México.
Microb Ecol. 2023 Aug;86(2):959-972. doi: 10.1007/s00248-022-02156-9. Epub 2022 Dec 15.
Mature composts and their water-based extracts, known as aerated compost teas (ACTs), are biofertilizers that share bioactive effects like soil restoration and plant health promotion, widely used for sustainable agriculture. Bioactive effects of compost and ACTs could be associated with their physicochemical and biological characteristics, like carbon/nitrogen (C/N) ratio and microbiota structure respectively. In our study, we elaborated ACTs using mature homemade compost, wheat bran, and grass clippings, following the C/N ratio criteria. Irrigation of tomato plantlets with ACT whose C/N ratio was close to the expected C/N ratio for mature compost evidenced plant growth promotion. Exploring the bacterial microbiota of elaborated ACTs and origin compost revealed significant structural differences, including phyla involved in N mineralization and free-living N-fixing bacteria. Therefore, ACTs harbor diverse bacterial microbiota involved in the N cycle, which would enrich plant and soil bacterial communities at the taxonomic and functional levels. Furthermore, ACTs are considered a part of agroecological and circular economy approaches.
成熟堆肥及其基于水的提取物，即充气堆肥茶（ACT），是生物肥料，具有土壤修复和促进植物健康等生物活性作用，广泛用于可持续农业。堆肥和 ACT 的生物活性作用可能与其物理化学和生物特性有关，例如碳/氮（C/N）比和微生物区系结构。在我们的研究中，我们使用成熟的自制堆肥、麦麸和草屑按照 C/N 比标准来制备 ACT。用 C/N 比接近成熟堆肥预期 C/N 比的 ACT 灌溉番茄苗，证明了其对植物生长的促进作用。对精心制作的 ACT 和原始堆肥的细菌微生物组进行探索，揭示了显著的结构差异，包括参与氮矿化和自由生活固氮菌的门。因此，ACT 中含有多种参与氮循环的细菌微生物组，这将丰富植物和土壤细菌群落的分类和功能水平。此外，ACT 被认为是农业生态和循环经济方法的一部分。
