Boron in soil: The impacts on the biomass, composition and activity of the soil microbial community

0510279 - MBÚ 2020 RIV NL eng J - Journal Article
Vera, A. - Moreno, J.L. - Garcia, C. - Morais, Daniel - Bastida, F.
Boron in soil: The impacts on the biomass, composition and activity of the soil microbial community.
Science of the Total Environment. Roč. 685, OCT 1 (2019), s. 564-573. ISSN 0048-9697. E-ISSN 1879-1026
Institutional support: RVO:61388971
Keywords : Desalinated seawater * Boron * Soil microbial community
OECD category: Microbiology
Impact factor: 6.551, year: 2019
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0048969719324283?via%3Dihub

The high boron (B) content in desalinated seawater is a concern for crop development. However, in spite of the importance of the soil microbial community in soil fertility, the below-ground impacts of B are still unknown. Here, in a soil-ryegrass model system, the activity, biomass and diversity of the soil microbial community were evaluated in response to irrigation with: i) 0.3 mg B L-1, ii) 1 mg B L-1, and 50 mg B L-1. We assessed two different compounds of boron: boric add (H3BO3) and disodium tetraborate decahydrate (Na2B4O7 center dot 10H(2)O). Overall, the 1 mg B L-1 dose was identified as the threshold limit that did not irreversibly harm soil sustainability. In contrast, the highest B dose had a noticeable impact on the nitrogen (N) cycle of the soil, as demonstrated by an increase in the water-soluble N content and a decrease in urease activity. Analysis of the phospholipid fatty adds (PLFAs) revealed that the effect of B on the soil microbial biomass was dependent on the chemical form used. High B doses reduced soil microbial respiration and influenced the composition of the bacterial and fungal communities, with fungal diversity being diminished, as revealed by sequencing approaches.
Permanent Link: http://hdl.handle.net/11104/0300791