Song Xiaotong, Liu Jiayi, Feng Yanzhang, Zhou Chengxu, Li Xiaohui, Yan Xiaojun, Ruan Roger, Cheng Pengfei
College of Food Science and Engineering, Ningbo University, Ningbo, Zhejiang, China.
School of Marine Sciences, Ningbo University, Ningbo, Zhejiang, China.
Front Plant Sci. 2024 Dec 23;15:1461945. doi: 10.3389/fpls.2024.1461945. eCollection 2024.
Continuous cropping decreases soil nutrients and destroys microbial community structure, so the development of eco-friendly and effective biofertilizers is necessary under present conditions. In this study, the preserving microalgal strain sp. (H) was firstly selected to be combined with agroforestry waste (shell powder, straw fermentation liquid) and the agroforestry microorganism sp. to form microalgae-based fertilizers for the continuous cropping soil of potted tomato. Compared to the control (CK), microalgae-based fertilizers (concentration: 4.45 × 10 cells/ml, dosage: 20 ml/day) improved soil nutrients and salinization indicators. Specifically, the combination of sp. and shell powder (HB) reduced electrical conductivity (EC) by 33.7% and significantly increased the Ca content by 59.4%; sp. and sp. (HY) improved the effects of available phosphorous (AP), DOC, DON, NH -N, NO -N, and Mg in the soil by 27.4%, 231.3%, 403.4%, 125.2%, 215.6%, and 73.4%, respectively. Microalgae-based fertilizers alter the abundance of soil bacteria and fungi, causing beneficial bacteria such as , , , and to increase, while pathogenic bacteria like , , and decreased. Combining microalgae with agroforestry wastes as a biofertilizer is promising to improve the microbial community structure of the soil with continuous cropping, which will aid in the increase of tomato production and promote green agricultural development.
连作会降低土壤养分并破坏微生物群落结构，因此在当前条件下开发环保且有效的生物肥料很有必要。在本研究中，首先选择保存的微藻菌株sp. (H) 与农林废弃物（贝壳粉、秸秆发酵液）和农林微生物sp. 组合，形成用于盆栽番茄连作土壤的微藻基肥料。与对照 (CK) 相比，微藻基肥料（浓度：4.45×10细胞/ml，用量：20 ml/天）改善了土壤养分和盐渍化指标。具体而言，sp. 与贝壳粉的组合 (HB) 使电导率 (EC) 降低了33.7%，并使钙含量显著增加了59.4%；sp. 与sp. 的组合 (HY) 分别使土壤中有效磷 (AP)、溶解性有机碳 (DOC)、溶解性有机氮 (DON)、铵态氮 (NH -N)、硝态氮 (NO -N) 和镁的含量提高了27.4%、231.3%、403.4%、125.2%、215.6% 和73.4%。微藻基肥料改变了土壤细菌和真菌的丰度，使有益细菌如、、、增加，而致病细菌如、、减少。将微藻与农林废弃物结合作为生物肥料有望改善连作土壤的微生物群落结构，这将有助于提高番茄产量并促进绿色农业发展。
