Assessing the effects of air-drying and rewetting pre-treatment on soil microbial biomass, basal respiration, metabolic quotient and soluble carbon under Mediterranean conditions

2007 ◽  
Vol 43 (2) ◽  
pp. 120-129 ◽  
Author(s):  
R. Zornoza ◽  
C. Guerrero ◽  
J. Mataix-Solera ◽  
V. Arcenegui ◽  
F. García-Orenes ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Basal Respiration ◽  
Metabolic Quotient ◽  
Air Drying ◽  
Soil Microbial ◽  
Drying And Rewetting ◽  
Pre Treatment ◽  
Mediterranean Conditions ◽  
Soluble Carbon

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

scholarly journals EFFECT OF WATER AVAILABILITY ON SOIL MICROBIAL BIOMASS IN SECONDARY FOREST IN EASTERN AMAZONIA

2015 ◽  
Vol 39 (2) ◽  
pp. 377-384 ◽  
Author(s):  
Lívia Gabrig Turbay Rangel-Vasconcelos ◽  
Daniel Jacob Zarin ◽  
Francisco de Assis Oliveira ◽  
Steel Silva Vasconcelos ◽  
Cláudio José Reis de Carvalho ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Microbial Biomass ◽  
Soil Water ◽  
Water Availability ◽  
Soil Microbial Biomass ◽  
Secondary Forest ◽  
Microbial Biomass Carbon ◽  
Basal Respiration ◽  
Soil Water Availability ◽  
Soil Microbial

Soil microbial biomass (SMB) plays an important role in nutrient cycling in agroecosystems, and is limited by several factors, such as soil water availability. This study assessed the effects of soil water availability on microbial biomass and its variation over time in the Latossolo Amarelo concrecionário of a secondary forest in eastern Amazonia. The fumigation-extraction method was used to estimate the soil microbial biomass carbon and nitrogen content (SMBC and SMBN). An adaptation of the fumigation-incubation method was used to determine basal respiration (CO2-SMB). The metabolic quotient (qCO2) and ratio of microbial carbon:organic carbon (CMIC:CORG) were calculated based on those results. Soil moisture was generally significantly lower during the dry season and in the control plots. Irrigation raised soil moisture to levels close to those observed during the rainy season, but had no significant effect on SMB. The variables did not vary on a seasonal basis, except for the microbial C/N ratio that suggested the occurrence of seasonal shifts in the structure of the microbial community.

scholarly journals Microbiological and biochemical properties of an agricultural Mexican soil amended with sewage sludge

2012 ◽  
Vol 36 (5) ◽  
pp. 1646-1655 ◽  
Author(s):  
Renato Armenta ◽  
Rocio Vaca ◽  
Jorge Lugo ◽  
Pedro del Aguila
Keyword(s):  
Alkaline Phosphatase ◽  
Organic Matter ◽  
Sewage Sludge ◽  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Biochemical Properties ◽  
Basal Respiration ◽  
Soil Microbial ◽  
Acid And Alkaline Phosphatase

The application of sewage sludge is a concern because it may affect the quality of organic matter and microbiological and biochemical soil properties. The effects of surface application of sewage sludge to an agricultural soil (at 18 and 36 t ha-1 dry basis) were assessed in one maize (Zea mays L.) growing season. The study evaluated microbial biomass, basal respiration and selected enzymatic activities (catalase, urease, acid and alkaline phosphatase, and β-glucosidase) 230 days after sewage sludge application and infrared spectroscopy was used to assess the quality of dissolved organic matter and humic acids. Sewage sludge applications increased the band intensity assigned to polysaccharides, carboxylic acids, amides and lignin groups in the soil. The organic matter from the sewage sludge had a significant influence on the soil microbial biomass; nevertheless, at the end of the experiment the equilibrium of the soil microbial biomass (defined as microbial metabolic quotient, qCO2) was recovered. Soil urease, acid and alkaline phosphatase activity were strongly influenced by sewage sludge applications.

scholarly journals Soil Microbial Biomass, Basal Respiration and Enzyme Activity of Main Forest Types in the Qinling Mountains

PLoS ONE ◽  
2013 ◽  
Vol 8 (6) ◽  
pp. e67353 ◽  
Author(s):  
Fei Cheng ◽  
Xiaobang Peng ◽  
Peng Zhao ◽  
Jie Yuan ◽  
Chonggao Zhong ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Basal Respiration ◽  
Qinling Mountains ◽  
Forest Types ◽  
Soil Microbial

scholarly journals Microbial responses to doses of cover plant straw in cerrado piauiense oxisol

2020 ◽  
Vol 36 (4) ◽  
Author(s):  
Sarah Priscilla do Nascimento Amorim ◽  
Cacio Luiz Boechat ◽  
Lizandra de Sousa Luz Duarte ◽  
Daniela Fernandes de Oliveira ◽  
João Carlos Medeiros ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Microbial Population ◽  
Microbial Biomass Carbon ◽  
Basal Respiration ◽  
Microbial Biomass C ◽  
Biomass Carbon ◽  
Carbon And Nitrogen ◽  
Soil Microbial ◽  
Soil Basal Respiration

Carbon and nitrogen from the soil microbial biomass play a significant role in the rotation of C and N, and promote nutrient cycling. Thus, the objective of this study was to evaluate changes in the soil microbial biomass with growing doses of cover plant straw species. The cover plants cultivated in the cerrado biome region were incorporated an Oxisol Ustox. The straw of each cover plant was incorporated at doses of 0; 10; 20 and 30 Mg ha-1. The soil basal respiration was determined by incubating, after 21 days. The microbial biomass carbon and nitrogen were determined by the method the microwave irradiation. The microbial biomass carbon and nitrogen contents in extracts were determined by the wet combustion method and Kjeldahl-N. The metabolic quotient was calculated as the ratio between soil basal respiration rate and microbial biomass C, and the microbial quotient as the ratio between soil microbial biomass C and total carbon of soil. The soil microbial population measured by the attributes of quality responds to the addition of the of grass and legume straws incorporated to the soil; The treatments that cause the greatest stress to the microbial population, at 21 days, mediated by the metabolic quotient, are guandu-anão at a dose of 10 Mg ha-1; Guandu-anão and Guandu fava-larga at 20 Mg ha-1 and Brachiária at a dose of 30 Mg ha-1; The best result regarding microbial attributes of soil quality evaluated was observed with the incorporation of all doses of the straw of Crotalaria-ocroleuca.  

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