Open AccessThe Influence of Microbiology on Soil Aggregation Stability
Author(s) -
Zahraa E. Hashim,
Lubna Alzubaidi,
Abdul-Sahib T. Al-Madhhachi
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/870/1/012110
Subject(s) - calcium carbonate , organic matter , cementation (geology) , chemistry , environmental chemistry , soil organic matter , carbonate , bulk soil , bacteria , soil structure , soil water , soil science , precipitation , microorganism , cement , environmental science , geology , materials science , organic chemistry , metallurgy , paleontology , physics , meteorology
In the present study, this work investigated the effects of bacteria (Bacillus sp.) decay and biological aggregating factors (organic matter, microbial calcium carbonate precipitation) at various steps on soil aggregate stability. Experiments carried out at different cultivation time 2, 5, and 8 weeks. The soil samples were compared the control (pure soil) versus soil treated with bacteria. The results showed that bacterial activity played an essential function in the macro-aggregate foundation. Nevertheless, the influence of organic matter (OM) on soil aggregate stability was important, which might be related to the microbial activity of bacteria to decay the organic material to an organic mineral that is connected with soil particles to form stable micro-aggregates. The CaCO 3 is one of the most stable bonding agencies in nature as it is called natural cement, The soil aggregates stability increased as calcium carbonate increased. No change of soil pH levels observed due to microbial reactions with soil. Hence, the appropriate pH was 7.5. In addition, the higher pH decreases enzymatic activity and carbonate tends to dissolve at pH levels are very low. This study affords the helpful of soil stabilization in the presence of natural cementation of bacteria in contrast with the previous studies.