Inhibition of urease activity in soils

Bremner, J. M.; Douglas, L. A.

doi:10.1016/0038-0717(71)90039-3

Cited by 232 publications

(161 citation statements)

References 25 publications

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“…In vergelyking met gerapporteerde waardes wereldwyd, wat varieer van 0 tot 2 964 met 'n gemiddeld van 218 mg kg-I grond uur-I vir bogronde (Bremner & Mulvaney, 1978), is die gemete waardes baie laag. Urease-aktiwiteite van bogronde in boorde van die Wes-Ka;tp (0-100 mm) varieer tussen 1.53 en 9.20 met 'n gemiddeld van 5.47 mg N kg-I grond uur-I (Du Preez, 1983) en in akkerbougronde van die Noordwes-Vrystaat (0-150 mm) tussen 6.28 en 11.03 mel 'n gemiddeld van S.-Afr.Tydskr.…”

Section: Result~te En Bespreklngunclassified

“…Verskeie faktore soos mikrobiese populasie, substraatkonsentrasie, grondreaksie, -deurlugting, -temperatuur, -diepte, organiese koolstof-, totale stikstof-, kalsiumkarbonaat-, walerinhoud, katioonadsorpsie-en buffervermoe bepaal onder andere die voorkoms en aktiwileit van urease in grande (Bremner & Mulvaney, 1978). Gevolglik varieer die urease-aktiwiteit van gronde baie waL die effektiwiteit van ureum as stikstofbron bei'nvloed (Mulvaney & Bremner, 1981).…”

Section: Inleidingunclassified

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Urease-aktiwiteite in gronde van die sentrale besproeiingsgebiede in Suid-Afrika

Thormählen¹,

Preez²

1991

South African Journal of Plant and Soil

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Section: Result~te En Bespreklngunclassified

Section: Inleidingunclassified

Urease-aktiwiteite in gronde van die sentrale besproeiingsgebiede in Suid-Afrika

Thormählen¹,

Preez²

1991

South African Journal of Plant and Soil

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“…In some soils, urease activity increases very markedly with the increase in temperature from 40°C to 70°C [37,60,61] but decreases rapidly above this temperature range [61,62]. The optimum pH of soil urease activity reported in past is 6.5 to 7.0 [63] and it is similar to that of jack bean urease [37,64,65].…”

Section: Soil Ureasementioning

confidence: 96%

Effective Use of Plant-Derived Urease in the Field of Geoenvironmental/ Geotechnical Engineering

Ran¹,

Kawasaki²

2016

J Civil Environ Eng

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Geotechnical and geo-environmental engineering applications currently being explored through bio mineralization process include cementation of sands to improve mechanical properties and hence, to enhance bearing capacity and liquefaction resistance, sequestration of carbon, soil erosion control via surficial stabilization, groundwater flow control and remediation of soil and groundwater impacted by metals and radionuclides. Bio mediated system broadly refers to a chemical reaction series that are managed and controlled through biological activities and byproducts resulting from those reactions alter the properties of material in the system. Bio mediated methods such as microbial induced calcite precipitation (MICP), biofilm formation, biogas generation and biopolymers have been developed by injecting or stimulating microbes. MICP is the most widely explored method. Microbes having urease activity enhance the hydrolysis of urea and it helps to control the pH and to precipitate carbonate. Although it is a widely explored bio mediated method it has some disadvantages.The plant-derived urease may offer many benefits over microbial urease to induce carbonate cementation. Therefore, it is advantageous to explore the knowledge regarding such a technique as an eco-friendly method for different applications in the fields of geoenvironmental/geotechnical Engineering. The main objective of this paper is to provide an overview of the importance of plant-derived urease for different applications in the fields of geoenvironmental/ geotechnical engineering. The information presented in this paper may be important for biotechnologists/geoengineers to have wide ranging updates on the current situation.

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“…Bremner & Mulvaney (1978) and Nannipieri et al (1996) have reported that humic acids and ureases are closely associated in soils. The enzymatic activity is stabilized when associated to organic and inorganic colloids, acting as a fundamental gateway for extra cellular urease stabilization in soils.…”

Section: Enzymesmentioning

confidence: 96%

Microbial enzymatic activity and thermal effect in a tropical soil treated with organic materials

Cenciani

Freitas

Critter

et al. 2008

Sci. agric. (Piracicaba, Braz.)

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Bacteria and fungi are the most active decomposers of organic materials in soil. They directly affect plant nutrient availability, and chemical and physical properties of soils. This investigation aimed at quantifying the effect of several organic materials on microbial activity of a Rhodic Eutrudox. Soil samples were incubated over a period of 91 days with the following organic materials: cattle manure (CM), earthworm humus (HM), and city sewage sludge from Barueri (BA) and Franca (FR). The activities of cellulase, protease and urease enzymes, the soil microbial carbon content (by fumigation-extraction method) and the exothermal effect were evaluated. Experimental design was randomized and arranged as factorial scheme five treatments × seven samplings with five replications. Organic materials promoted oscillations in microbial carbon (mg C g -1 soil), and enzyme activities -cellulase (µg glucose g -1 soil 24 h ) e no efeito térmico total (J g -1 solo), na seguinte ordem decrescente: (1) 655.90; 49.68; 24.55; 477.90; 367.70; 32.76; 10.66; 426.29; 273.40; 18.77; 19.35; 368.00; (4) 261.00; 17.05; 9.02; 202.79; (5) controle. Correlações foram obtidas entre o carbono microbiano e as enzimas celulase e protease (r = 0.54; p < 0.001), e entre o efeito exotérmico e a protease (r = 0.34; p < 0.005). A atividade de enzimas esteve diretamente relacionada à microbiota do solo, refletindo, dessa forma, no efeito térmico total. Palavras-chave: enzimas, carbono da biomassa, materiais orgânicos, microrganismos do solo, microcalorimetria

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Inhibition of urease activity in soils

Cited by 232 publications

References 25 publications

Urease-aktiwiteite in gronde van die sentrale besproeiingsgebiede in Suid-Afrika

Urease-aktiwiteite in gronde van die sentrale besproeiingsgebiede in Suid-Afrika

Effective Use of Plant-Derived Urease in the Field of Geoenvironmental/ Geotechnical Engineering

Microbial enzymatic activity and thermal effect in a tropical soil treated with organic materials

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