Grunert Oliver, Hernandez-Sanabria Emma, Vilchez-Vargas Ramiro, Jauregui Ruy, Pieper Dietmar H, Perneel Maaike, Van Labeke Marie-Christine, Reheul Dirk, Boon Nico
Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Coupure Links 653, B-9000 Gent, Belgium.
Peltracom NV, Skaldenstraat 7a, B-9042 Ghent-Desteldonk, Belgium.
Sci Rep. 2016 Jan 5;6:18837. doi: 10.1038/srep18837.
The choice of soilless growing medium for plant nutrition, growth and support is crucial for improving the eco-sustainability of the production in horticultural systems. As our current understanding of the functional microbial communities inhabiting this ecosystem is still limited, we examined the microbial community development of the two most important growing media (organic and mineral) used in open soilless horticultural systems. We aimed to identify factors that influence community composition over time, and to compare the distribution of individual taxa across growing media, and their potential functionality. High throughput sequencing analysis revealed a distinctive and stable microbial community in the organic growing medium. Humidity, pH, nitrate-N, ammonium-N and conductivity were uncovered as the main factors associated with the resident bacterial communities. Ammonium-N was correlated with Rhizobiaceae abundance, while potential competitive interactions among both Methylophilaceae and Actinobacteridae with Rhizobiaceae were suggested. Our results revealed that soilless growing media are unique niches for diverse bacterial communities with temporal functional stability, which may possibly impact the resistance to external forces. These differences in communities can be used to develop strategies to move towards a sustainable horticulture with increased productivity and quality.
选择无土栽培基质用于植物营养、生长和支撑，对于提高园艺系统生产的生态可持续性至关重要。由于我们目前对栖息于该生态系统中的功能性微生物群落的了解仍然有限，我们研究了开放式无土园艺系统中使用的两种最重要的栽培基质（有机和无机）的微生物群落发展情况。我们旨在确定随时间影响群落组成的因素，并比较不同栽培基质中各个分类群的分布及其潜在功能。高通量测序分析揭示了有机栽培基质中独特且稳定的微生物群落。湿度、pH值、硝态氮、铵态氮和电导率被发现是与常驻细菌群落相关的主要因素。铵态氮与根瘤菌科丰度相关，同时推测嗜甲基菌科和放线菌科与根瘤菌科之间存在潜在竞争相互作用。我们的结果表明，无土栽培基质是具有时间功能稳定性的多样细菌群落的独特生态位，这可能会影响对外界力量的抗性。群落中的这些差异可用于制定策略，以实现具有更高生产力和质量的可持续园艺。
