Evaluation of the Ability to Control Biological Precipitation to Improve Sandy Soils

Kalantary, Farzin; Kahani, Mostafa

doi:10.1016/j.proeps.2015.08.067

Cited by 18 publications

(7 citation statements)

References 18 publications

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“…When 23.4 kg/ha Si was applied, MBC peaked, with increases of 23.6% following early planting and 12.9% following late planting, compared with the control (Table 4). Other studies have demonstrated that soil microorganisms play an important role in the decomposition and synthesis of soil organic matter, which is a significant source of the reserves of soil nutrients available for plant growth (Sinha et al, 2009;Canakci et al, 2015;Kalantary and Kahani, 2015;Khaleghi and Rowshanzamir, 2019). There were strong correlations (r=0.836-0.994) among MBC, AN/TN, and AP/TP and among MBN, MBP, AN/TN, and AP/TP, indicating that the increase in the total amount of soil microorganisms with Si nutrient supply was an important factor for increasing the availabilities of soil N and P, and that MBN and MBP as reserves of organic N and P made important contributions to the content of AN and AP.…”

Section: Discussionmentioning

confidence: 99%

Effects of supplying silicon nutrient on utilization rate of nitrogen and phosphorus nutrients by rice and its soil ecological mechanism in a hybrid rice double-cropping system

Liao

Fang

Liang

et al. 2020

J. Zhejiang Univ. Sci. B

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This study was conducted to reveal the effects of silicon (Si) application on nutrient utilization efficiency by rice and on soil nutrient availability and soil microorganisms in a hybrid rice double-cropping planting system. A series of field experiments were conducted during 2017 and 2018. The results showed that Si nutrient supply improved grain yield and the utilization rates of nitrogen (N) and phosphorus (P) to an appropriate level for both early and late plantings, reaching a maximum at 23.4 kg/ha Si. The same trends were found for the ratios of available N (AN) to total N (TN) and available P (AP) to total P (TP), the soil microbial biomass carbon (MBC), microbial biomass nitrogen (MBN), microbial biomass phosphorus (MBP), and the ratios of MBN to TN and MBP to TP, at different levels of Si. Statistical analysis further revealed that Si application enhanced rice growth and increased the utilization rate of fertilizer due to an ecological mechanism, i.e., Si supply significantly increased the total amount of soil microorganisms in paddy soil compared to the control. This promoted the mineralization of soil nutrients and improved the availability and reserves of easily mineralized organic nutrients.

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Section: Discussionmentioning

confidence: 99%

Effects of supplying silicon nutrient on utilization rate of nitrogen and phosphorus nutrients by rice and its soil ecological mechanism in a hybrid rice double-cropping system

Liao

Fang

Liang

et al. 2020

J. Zhejiang Univ. Sci. B

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“…When this reaction is performed in the presence of Ca 2+ , CaCO3 sediment is formed. Hydrolysis of urea is a slow and lengthy process when there is no catalyzer, but in the presence of urease enzyme, this reaction is about 10 14 times faster than that of the natural process (30). In the presence of a urease-positive bacterium, urease enzyme is discharged from bacteria and the amount and rate of sediment formation are controlled by biological activity (31).…”

Section: Effect Of Urease Activity On the Microbial-induced Calcite Pmentioning

confidence: 99%

An environmentally friendly soil improvement technology for sand and dust storms control

Agereh

Kiani

Khavazi³

et al. 2019

Environ Health Eng Manag

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Background: Dust storms occur when unchecked, strong, or turbulent winds combine with exposed loose and dried soil surfaces. Sand and dust storms have a significant impact on society, economy, and environment at local, regional, and global levels. The environmental and health hazards of such storms cannot be permanently reduced, however, by taking appropriate measures, its impact can be reduced. The present study aimed to investigate the effects of microbial precipitation of calcium carbonate (CaCO3) as a biocompatible agent on soil stabilization and control of dust storms using ureaseproducing bacteria (UPB) as a biological improvement technique, which were isolated, identified, sprayed on the soil surface. Methods: For this purpose, the erosion of bio-cemented soil samples was investigated experimentally in a wind tunnel under the condition of wind velocity of 0 to 98 km.h-1 in two soil types with sandy and silty texture in a completely randomized design with three replicates. Results: The investigation of the threshold wind velocity of soil particles showed that soil particles began to move at velocity of 8 and 10 km.h-1 in silty and sandy soils, respectively, but in all biological samples (MICP), particles did not move until the wind speed reached 97 km.h-1. It was also revealed that the weight loss of all MICP-treated samples at different wind velocities was significantly reduced compared to the control group. Differences in the amount of soil loss among bio-cemented samples and control treatments were even superior at higher velocities, so that at velocities more than 57 km.h-1, soil losses increased significantly in the control group, while in soils treated with bacteria, soil loss was very low (about 2.5 kg.m-2.h-1). Comparison of the bacteria used in this study also showed that Bacillus infantis and Paenibacillus sp3 had high efficiency in controlling dust storms. Conclusion: The formation of abrasion-resistant surface layers on soil samples treated by biocementation showed that cementation by biological methods could be an effective way to stabilize surface particles and control sand and dust storms.

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“…This situation improves soil mechanical properties crucial. An investigation carried out in 2008 reported that over six billion US dollars were spent annually to finance over forty thousand soil improvement projects worldwide (Kalantary & Kahani, 2015). Although, for the past few years, several methods and materials were developed to improve the engineering characteristics of soils.…”

Section: Introductionmentioning

confidence: 99%

Microbial-Induced Calcite Precipitation: A Milestone Towards Soil Improvement

Dardau

Mustafa

Aziz

2021

MABJ

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Microbial-induced calcite precipitation (MICP) is a natural process that offered various applications in the engineering field materials and construction industry. It has recently emerged as an innovative, eco-friendly, and economically engineeredprocess. One of the successful MICP methods of improving the engineering properties of soils is ureolysis. The ureolysis drove the process of precipitate calcite which binds soil particles within the soil matrix thus enhance soil characteristicssuch as stiffness, permeability, hydraulic conductivity, shear strength, and compressive strength. This paper aimed at reviewing the concept of utilizing calcium carbonate (CaCO3) precipitation by ureolytic bacteria towards the improvement of soil and sand engineering properties for various geotechnical applications. The potential applications of this technologyin soil erosion, stability, and reinforcement were discussed. Detail overviews of the temperature, pH, bacteria cell concentration, nutrients, types of bacteria, and concentration of reactants that affect the efficiency of the process are also reviewed. This review demonstrated the potential of the MICP technology from the laboratory to a field-scale or commercial applications.

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Evaluation of the Ability to Control Biological Precipitation to Improve Sandy Soils

Cited by 18 publications

References 18 publications

Effects of supplying silicon nutrient on utilization rate of nitrogen and phosphorus nutrients by rice and its soil ecological mechanism in a hybrid rice double-cropping system

Effects of supplying silicon nutrient on utilization rate of nitrogen and phosphorus nutrients by rice and its soil ecological mechanism in a hybrid rice double-cropping system

An environmentally friendly soil improvement technology for sand and dust storms control

Microbial-Induced Calcite Precipitation: A Milestone Towards Soil Improvement

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