Production and persistence of urease activity in soils

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

doi:10.1016/0038-0717(76)90035-3

Cited by 64 publications

(15 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Burns et al [2] and Zantua and Bremner [17] found that urease activity in a soil was maintained even under anaerobic environments, high temperatures and sterile conditions. The site of urease activity has been correlated to both clay particles and soil OM [9,10,12,13,14,16].…”

Section: Introductionmentioning

confidence: 98%

Ammonia losses from surface-applied urea as related to urea application rates, plant residue and calcium chloride addition

Fenn

Malstrom

1987

Fertilizer Research

View full text Add to dashboard Cite

Abstract. Volatile losses of NH 3 from surface-applied urea are known to decrease in the presence of soluble Ca-salts or with a decrease in easily decomposable organic matter content (EDOM), both of which influence urease activity. How these factors interact to affect NH 3 losses is not fully understood. Studies were conducted to determine the effect CaC12 in sand with varying rates of EDOM on NH 3 losses from surface applied urea. The same effects were examined on agricultural soils containing partially decomposed native organic matter (NOM). Determinations were made in the laboratory on field soils, sand free of organic matter and sand with known amounts of grass clippings (GC, EDOM). Low levels of GC in sand with low amounts of added urea resulted in little NH3 loss. Ammonia loss increased as more N was applied at the low levels of GC. The loss was independent of urea application rates at high levels of GC. Ammonia losses were reduced more effectively at low EDOM and NOM in the presence of Ca. Incubation of sand with GC at low rates prior to urea addition increased NH 3 losses relative to high levels of non-incubated GC. For the above situation incubation for as high as 24 days resulted in equivalent NH 3 losses. The amount and state of decomposition of existing organic matter affected the degree ofNH 3 loss from surface placed urea and its control by added Ca-salts. Microbial decomposition of EDOM, such as might occur in the spring prior to urea addition, led to greater NH 3 losses. Greater loss of NH 3 from urea might be an indication of a larger ureolytic microbial population leading to increased urease production,

show abstract

Section: Introductionmentioning

confidence: 98%

Ammonia losses from surface-applied urea as related to urea application rates, plant residue and calcium chloride addition

Fenn

Malstrom

1987

Fertilizer Research

View full text Add to dashboard Cite

show abstract

“…Possible differences in animal stocking rates during the grazing of pastures or maize stubble, and the amounts of urea excreted, are unlikely to have directly influenced soil urease values. Zantua & Bremner (1976) found that treatment of soils with urea had no direct effect on urease activity; previous results of the influence of urea on soil urease activity were considered to be inconclusive (Bremner & Mulvaney 1978).…”

Section: Discussionmentioning

confidence: 91%

Biochemical changes in a yellow-brown loam and a central gley soil converted from pasture to maize in the Waikato area

Cairns¹

1982

New Zealand Journal of Agricultural Research

View full text Add to dashboard Cite

“…However, Zantua and Bremner (1976) reported no influence of urea on urease activity of a soil in a laboratory incubation study without any crop. Higher production of crop residue in the supplemented plots increased the organic matter level, which consequently elevated the enzyme activities of soil.…”

Section: Urease (Ur) and Acid Phosphatase (Ap) Activities Of Soilmentioning

confidence: 94%

Residual effect of municipal solid waste compost on microbial biomass and activities in mustard growing soil: Restwirkung von müllkompost auf die mikrobielle biomasse und mikrobielle aktivitaten in boden mit senfbewuchs

Bhattacharyya

Chakrabarti

Chakraborty

2003

Archives of Agronomy and Soil Science

View full text Add to dashboard Cite

Production and persistence of urease activity in soils

Cited by 64 publications

References 12 publications

Ammonia losses from surface-applied urea as related to urea application rates, plant residue and calcium chloride addition

Ammonia losses from surface-applied urea as related to urea application rates, plant residue and calcium chloride addition

Biochemical changes in a yellow-brown loam and a central gley soil converted from pasture to maize in the Waikato area

Residual effect of municipal solid waste compost on microbial biomass and activities in mustard growing soil: Restwirkung von müllkompost auf die mikrobielle biomasse und mikrobielle aktivitaten in boden mit senfbewuchs

Contact Info

Product

Resources

About