Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 685, Issue -, Pages 564-573Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2019.05.375
Keywords
Desalinated seawater; Boron; Soil microbial community; Diversity; Enzyme activities; Semi-arid soil
Categories
Funding
- Spanish Ministry of Science, Innovation and Universities [AGL2017-85755-R]
- FEDER funds [AGL2017-85755-R]
- Fundacion Seneca [19896/GERM/15]
- CSIC [201740I008]
Ask authors/readers for more resources
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. (C) 2019 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available