Huang Anxiang, Wang Zhongwei, Yang Dingyun, Yang Shoulu, Bai Wennian, Wu Nengying, Lu Xiang, Liu Zhu
Guizhou Academy of Forestry, Guiyang, China.
Qianxinan Ecological Environment Monitoring Centre, Xingyi, China.
Front Microbiol. 2023 Aug 10;14:1231978. doi: 10.3389/fmicb.2023.1231978. eCollection 2023.
Soil microorganisms play important roles in promoting soil ecosystem restoration, but much of the current research has been limited to changes in microbial community structure in general, and little is known regarding the soil physicochemical property and microbial community structure. In this study, four organic fertilizers were first prepared based on tea oil camellia shell (TOCS). Our findings indicate that the application of BOFvo increased both total pore volume and BET surface area of the rhizosphere soils, as well there was a remarkable enhancement in total organic matter (TOM), total nitrogen (TN), available nitrogen (AN), total phosphorus (TP), total potassium (TK), and available potassium (AK) contents of the rhizosphere soils. Meanwhile, in comparison to the CK and CF groups, the utilization of BOFvo led to a substantial increase in both average yield and fruiting rate per plant at maturity, as well resulted in a significant increase in TN and TP contents of tea oil camellia leaves. Furthermore, our findings suggest that the application of TOCS-based organic fertilizers significantly enhances the microbial diversity in the rhizosphere soils with Proteobacteria and Ascomycota being the dominant bacterial and fungal phyla, respectively, and and being the dominant bacterial and fungal genus, respectively. Redundancy analysis (RDA) indicates that the physicochemical characteristics of TOCS-based organic fertilizers had a significant impact on the composition and distribution of microbial communities in the rhizosphere soils. This study will facilitate the promotion and application of TOCS-based organic fertilizers, thereby establishing a foundation for the reuse of tea oil camellia waste resources.
土壤微生物在促进土壤生态系统恢复方面发挥着重要作用，但目前的研究大多局限于微生物群落结构的总体变化，对土壤理化性质和微生物群落结构的了解较少。在本研究中，首先基于油茶壳制备了四种有机肥料。我们的研究结果表明，施用BOFvo增加了根际土壤的总孔隙体积和BET表面积，同时根际土壤的总有机质（TOM）、总氮（TN）、有效氮（AN）、总磷（TP）、总钾（TK）和有效钾（AK）含量也显著提高。同时，与CK和CF组相比，施用BOFvo使成熟时的平均产量和单株结果率大幅增加，油茶叶片的TN和TP含量也显著增加。此外，我们的研究结果表明，施用基于油茶壳的有机肥料显著提高了根际土壤的微生物多样性，其中变形菌门和子囊菌门分别是主要的细菌和真菌门类， 和 分别是主要的细菌和真菌属。冗余分析（RDA）表明，基于油茶壳的有机肥料的理化特性对根际土壤微生物群落的组成和分布有显著影响。本研究将有助于基于油茶壳的有机肥料的推广应用，从而为油茶废弃物资源的再利用奠定基础。
