Urea Transformations and Fertilizer Efficiency in Soil

Gould, W. Douglas; Hagedorn, Charles; McCready, R. G. L.

doi:10.1016/s0065-2113(08)60283-7

Cited by 89 publications

(46 citation statements)

References 269 publications

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“…13 It was the first enzyme ever to be extracted and studied. Until recently most of the knowledge on urease has been derived from studies of the jack bean urease (see reviews of Kiss et aZ.,l4 Bremner & Mulvaney,ls and Gould et al 16)). However, in order to understand and control the urease activity in soil, studyingits beha viour within the soil matrices is essential.…”

Section: Introductionmentioning

confidence: 99%

“…Priority has been given to this aspect during the past several year^'^-^^ and this has enabled scientists to identify more effective compounds that inhibit urease activty in soi1. 13,16,[24][25][26] However, information on urease enzyme pertaining to Sri Lankan conditions is rather m e a g~-e .~~-~~ Therefore, further research on urease activity specific to local situations should be conducted.…”

Section: Introductionmentioning

confidence: 99%

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Urease activity in soils : a review

Dharmakeerthi¹,

Mw²

1996

J. Natn. Sci. Foundation Sri Lanka

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Extensive literature on the unique soil enzyme urease is reviewed and presented to create vigilance among local scientists, and to motivate them to conduct more research on urease activity under Sri Lankan conditions. Soil urease is mainly microbial in origin, and its activity in soils is due to accumulated urease. However, comparison of reported urease activity levels in different soils was extremely difficult as the assay procedures adopted in the various studies were different. Further, this enzyme is remarkably stable in organo-mineral complexes found in soil. Factors affecting urease activity and correlations between urease activity and soil properties are discussed. Problems associated with high urease activity, i.e. gaseous loss of N and plant damage due to ammonia gas and accumulated nitrite, and the effectiveness of most recently found compounds in overcoming these problems are also discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Urease activity in soils : a review

Dharmakeerthi¹,

Mw²

1996

J. Natn. Sci. Foundation Sri Lanka

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“…When, enzyme activity is high in soil, the rate of hydrolysis of urea is increased and high soil pH and greater losses of gaseous ammonia can be observed. Although high ammonium ion concentration in soil is non-toxic, ammonia gas is extremely toxic to the plant [67]. Therefore, the loss of volatile ammonia and ammonia toxicity to germinate seedlings are major problems in urea fertilization.…”

Section: Soil Ureasementioning

confidence: 99%

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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“…Dit sluit prosesse soos hidrolise, nitrifIkasie, mineralisasie en immobilisasie in (Stevenson, 1982). By die gebruik van ureum as stikstofbron is dit veral die ensiematiese hidrolise daarvan na ammonium wat van groot belang is (Gould, Hagedorn & McCready, 1986). As sulks kan ureum slegs in baie klein hoeveelhede deur plantwortels opgeneem word sodat dit nie as 'n plantvoedingstof beskou word nie (Hirose & GOIO, 1961).…”

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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Urea Transformations and Fertilizer Efficiency in Soil

Cited by 89 publications

References 269 publications

Urease activity in soils : a review

Urease activity in soils : a review

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

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

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