Effects of Air-Drying and Rewetting on Extractable Organic Carbon, Microbial Biomass, Soil Respiration and β-Glucosidase and β-Galactosidase Activities of Minimally Disturbed Soils Under Mediterranean Conditions

2011 ◽  
pp. 103-118
Author(s):  
Graciela Marando ◽  
Patricia Jiménez ◽  
Ramón Josa ◽  
Maria Julià ◽  
Marta Ginovart ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Respiration ◽  
Air Drying ◽  
Drying And Rewetting ◽  
Disturbed Soils ◽  
Mediterranean Conditions

Assessing air-drying and rewetting pre-treatment effect on some soil enzyme activities under Mediterranean conditions

2006 ◽  
Vol 38 (8) ◽  
pp. 2125-2134 ◽  
Author(s):  
R. Zornoza ◽  
C. Guerrero ◽  
J. Mataix-Solera ◽  
V. Arcenegui ◽  
F. García-Orenes ◽  
...  
Keyword(s):  
Treatment Effect ◽  
Enzyme Activities ◽  
Soil Enzyme ◽  
Soil Enzyme Activities ◽  
Air Drying ◽  
Drying And Rewetting ◽  
Pre Treatment ◽  
Mediterranean Conditions

Response of microbial biomass to air-drying and rewetting in soils and compost

Geoderma ◽  
2002 ◽  
Vol 105 (1-2) ◽  
pp. 111-124 ◽  
Author(s):  
C Mondini ◽  
M Contin ◽  
L Leita ◽  
M De Nobili
Keyword(s):  
Microbial Biomass ◽  
Air Drying ◽  
Drying And Rewetting

Effects of Different Applying Fertilization Patterns on Soil Microorganisms, Organic Carbon and Respiration Flux in Maize Grown under Ridge Cultivation

2012 ◽  
Vol 518-523 ◽  
pp. 4701-4706
Author(s):  
Yun Xian Dai ◽  
Jing Hui Liu ◽  
Li Jun Li ◽  
Aodungerile Chen ◽  
Li Gang Wang ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Respiration ◽  
Carbon Content ◽  
Soil Microbial Biomass ◽  
Organic Fertilizer ◽  
Total Biomass ◽  
Organic Carbon Content ◽  
Soil Microbial ◽  
Organic Carbon Concentration

The effects of three different fertilization patterns including single chemical fertilizer(DH), chemical-organic fertilizer(HY), and single organic fertilizer (DY),no fertilizer(CK) on soil microbial biomass, soil organic carbon content, yield and soil respiration flux in ridge cultivation maize fields in the West Liaohe region were studied. The results showed that soil microbial biomass, organic carbon content, yield and soil respiration flux under HY were higher than the rest of other treatments in 2005 and 2006. The varying order of soil microbial total biomass performed as HY>DY>DH>CK on the ridge-tillage maize farmland. The soil total nitrogen concentration, organic carbon concentration and respiration of HY were significantly higher than the rest of other treatments (p HY> DH > CK; the order of biological yield was DH>HY>DY> CK; the order of grain yield was HY>DH>DY> CK and the economic coefficient of HY was the highest in both years.

MICROBIAL BIOMASS AND EXTRACTABLE SULFATE SULFUR LEVELS IN NATIVE AND CULTIVATED SOILS AS INFLUENCED BY AIR-DRYING AND REWETTING

1989 ◽  
Vol 69 (4) ◽  
pp. 889-894 ◽  
Author(s):  
V. V. S. R. GUPTA ◽  
J. J. GERMIDA
Keyword(s):  
Microbial Biomass ◽  
Key Words ◽  
Microbial Activity ◽  
Microbial Biomass Carbon ◽  
Biomass Carbon ◽  
Air Drying ◽  
Sulfate Sulfur ◽  
Drying And Rewetting ◽  
Source And Sink ◽  
Cultivated Soils

Air-drying decreased (> 80%) microbial activity, microbial biomass carbon (MB-C) and sulfur (MB-S) levels of both native and cultivated soils. This resulted in a flush (~ 4 μg g−1) in the 0.01 M CaCl2 extractable SO4-S. Rewetting soils restored microbial activity and biomass contents to their original levels, but this led to immobilization of the SO4-S. Restoration of the MB-S levels was slower than MB-C levels. Thus, during drying and rewetting cycles, the MB-S pool acts as both a source and sink for the SO4-S pool in soil. Key words: Microbial activity, microbial biomass sulfur, extractable sulfate sulfur

Planktonic and microbial contributions to phosphorus release from fresh and air-dried sediments

1995 ◽  
Vol 46 (7) ◽  
pp. 1039 ◽  
Author(s):  
S Qiu ◽  
AJ McComb
Keyword(s):  
Microbial Biomass ◽  
Sediment Cores ◽  
Phosphorus Release ◽  
Bacterial Respiration ◽  
Air Drying ◽  
Drying And Rewetting ◽  
Dissolved Reactive Phosphorus ◽  
Bacterial Uptake ◽  
Reactive Phosphorus ◽  
North Lake

There was a fivefold increase in the concentration of P (dissolved reactive phosphorus) after intact sediment cores from North Lake, Western Australia, were air-dried and reflooded. Effects of plankton and microbial biomass on phosphorus release were investigated. Freshly killed plankton released P before drying, but less P was released when plankton biomass was air-dried. Bacteria were important contributors of P during drying and rewetting, and their contributions occurred through two processes: (I) when sufficient moisture and oxygen were available, bacteria rapidly removed soluble P from the water and incorporated it into the particulate phase, the amount of P taken up being positively correlated with bacterial respiration; and (2) upon drying, bacterially stored P was partly returned to the water, the release increasing with increasing bacterial uptake. The bacterial contribution of P upon drying was further investigated by sterilizing air-dried and wet sediments with a low dose of gamma irradiation (10 kGy). It was thus possible to discriminate among P contributed from the native (initial) microbial biomass (Pi) before drying, P released from the increased (developed) microbial biomass (Pii) during drying, and P stored in bacteria that had survived air-drying (Ps). It was estimated that air-drying killed about 76% of the microbial biomass. At relatively low external P concentrations (<1000 μg L-1), the increased P brought about by air-drying was mainly derived from killed microbial biomass.

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