Stability of urease in soils

Zantua, M.I.; Bremner, J. M.

doi:10.1016/0038-0717(77)90050-5

Cited by 152 publications

(61 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Provavelmente, as maiores perdas de amônia em solo úmido, em comparação ao saturado, ocorreram em razão da maior atividade da urease naquela condição (CAI et al, 1989), acelerando a hidrólise enzimática da ureia, com a liberação de amônia e dióxido de carbono para a atmosfera. Segundo ZANTUA & BREMNER (1977), os solos diferem entre si quanto ao nível de atividade da urease, que é determinado por sua habilidade em preservar a ureia da degradação microbiana e de outros processos inativadores. Vários fatores influenciam a atividade da urease no solo, especialmente a temperatura (PETTIT et al, 1976), o pH (DELAUNE & PATRICK JR., 1970), o conteúdo de água (SANKHAYAN & SHUKLA, 1976) e a concentração de ureia (AYANABA & KANG, 1976).…”

Section: Resultsunclassified

Perdas de nitrogênio por volatilização de amônia e resposta do arroz irrigado à aplicação de ureia tratada com o inibidor de urease NBPT

et al. 2010

View full text Add to dashboard Cite

Palavras-chave: adubo nitrogenado, ureia, eficiência do fertilizante, volatilização de amônia, N-(nbutil) triamida tiofosfórica. ABSTRACT Urea is the main nitrogen source used in flooded rice fields, but it is prone to ammonia volatilization losses. The use of N-(n-butyl) thiophosphoric triamide (NBPT) urease inhibitor, as urea additive, can reduce this inconvenient, inhibiting temporarily urea enzymatic degradation. An experiment was carried out on a Planossolo Háplico (Albaqualf), from October 2004 to April 2005, in Capão do Leão, RS, Brazil, to

show abstract

Section: Resultsunclassified

Perdas de nitrogênio por volatilização de amônia e resposta do arroz irrigado à aplicação de ureia tratada com o inibidor de urease NBPT

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Soil urease is urease that is released from dead plants and ureolytic microorganisms after cell lysis and then immobilized on clays and humic substances. It has been suggested that the immobilization of urease results in increased enzymatic stability against both temperature and proteolytic enzymes (Ciurli et al 1996;Pettit et al 1976;Zantua and Bremner 1977).…”

Section: Soil Ureasementioning

confidence: 99%

The molecular processes of urea hydrolysis in relation to ammonia emissions from agriculture

Sigurdarson

Svane

Karring

2018

Rev Environ Sci Biotechnol

237

129

View full text Add to dashboard Cite

Ammonia emissions from the agricultural sector give rise to numerous environmental and societal concerns and represent an economic challenge in crop farming, causing a loss of fertilizer nitrogen. Ammonia emissions from agriculture originate from manure slurry (livestock housing, storage, and fertilization of fields) as well as urea-based mineral fertilizers. Consequently, political attention has been given to ammonia volatilization, and regulations of ammonia emissions have been implemented in several countries. The molecular cause of the emission is the enzyme urease, which catalyzes the hydrolysis of urea to ammonia and carbonic acid. Urease is present in many different organisms, encompassing bacteria, fungi, and plants. In agriculture, microorganisms found in animal fecal matter and soil are responsible for urea hydrolysis. One strategy to reduce ammonia emissions is the application of urease inhibitors as additives to urea-based synthetic fertilizers and manure slurry to block the formation of ammonia. However, treatment of the manure slurry with urease inhibitors is associated with increased livestock production costs and has not yet been commercialized. Thus, development of novel, environmentally friendly and cost-effective technologies for ammonia emission mitigation is important. This mini-review describes the challenges associated with the volatilization of ammonia in agriculture and provides an overview of the molecular processes of urea hydrolysis and ammonia emissions. Different technologies and strategies to reduce ammonia emissions are described with a special focus on the use of urease inhibitors. The mechanisms of action and efficiency of the most important urease inhibitors in relation to agriculture will be briefly discussed.

show abstract

“…Numerous studies show that the urease activity in soils increases with the increase in temperature from 10°C to 40°C. 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: 95%

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

Ran¹,

Kawasaki²

2016

J Civil Environ Eng

View full text Add to dashboard Cite

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.

show abstract

Stability of urease in soils

Cited by 152 publications

References 16 publications

Perdas de nitrogênio por volatilização de amônia e resposta do arroz irrigado à aplicação de ureia tratada com o inibidor de urease NBPT

Perdas de nitrogênio por volatilização de amônia e resposta do arroz irrigado à aplicação de ureia tratada com o inibidor de urease NBPT

The molecular processes of urea hydrolysis in relation to ammonia emissions from agriculture

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

Contact Info

Product

Resources

About