Absolute and specific enzymatic activities of sandy entisol from tropical dry forest, monoculture and intercropping areas

Medeiros, Érika Valente de; Notaro, Krystal de Alcantara; Barros, Jamilly Alves de; Moraes, Wendson da Silva; Silva, Aline Oliveira; Moreira, Keila Aparecida

doi:10.1016/j.still.2014.09.013

Cited by 60 publications

(47 citation statements)

References 50 publications

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“…However, the Caatinga soil had a higher total organic carbon (TOC) content than the pasture soil (Table 1). Both contents were within the range usually found in sandy soils of semiarid regions (Santos et al, 2012;Medeiros et al, 2015) and the higher Caatinga TOC was not enough to cause a different pore size distribution compared to that from pasture soil.…”

Section: Resultssupporting

confidence: 46%

Soil CO2 Efflux Measurements by Alkali Absorption and Infrared Gas Analyzer in the Brazilian Semiarid Region

Ferreira

Antonino

Sampaio

et al. 2018

Rev. Bras. Ciênc. Solo

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ABSTRACT:The CO 2 emission from the soil surface, commonly referred to as soil CO 2 efflux (ECO 2 ) or soil respiration, is the sum of processes that include root respiration and microbial activity. Measuring this evolution is important to establish sustainable land use models and to estimate global fluxes of carbon, which affect climate change. Despite its importance, few measurements have been made in areas of the semiarid Brazilian Northeast region, and most of them were made using the alkali absorption method (AA), which can underestimate ECO 2 . Measurements using AA were compared to measurements using the infrared gas analyzer method (IRGA) over ten months (in rainy and dry seasons), during the day and night, in areas of Caatinga (xeric shrubland and thorn forest) and pasture in the Agreste region of the state of Pernambuco. The ECO 2 measurements from AA varied little from night to day and throughout the year or in the rainy and dry seasons. However, those obtained from IRGA were higher in the rainy than in the dry season, but also without significant differences from day to night. The values of both methods were similar in the dry season, but in the rainy season they were higher with the IRGA. Therefore, AA seems to have little sensitivity to seasonal variations, in contrast with measurements from the IRGA, and it may underestimate soil ECO 2 when it attains higher values. This result indicates that some of the soil ECO 2 values determined in areas of the Brazilian semiarid region, and consequently annual C losses, may have been underestimated.

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Section: Resultssupporting

confidence: 46%

Soil CO2 Efflux Measurements by Alkali Absorption and Infrared Gas Analyzer in the Brazilian Semiarid Region

Ferreira

Antonino

Sampaio

et al. 2018

Rev. Bras. Ciênc. Solo

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“…Studies have shown that different land use treatments have an influence on soil specific enzyme activities per unit of SOC or MBC (Medeiros et al, 2015;Raiesi and Beheshti, 2014;Trasar-Cepeda et al, 2008;Waldrop et al, 2000), but to date, little information is available about the effects of fertilization on specific enzyme activities. The responses of soil specific enzyme activities may be clearer than those of the absolute enzyme activities and so could act as indicators to support farmers' decision-making to avoid soil degradation (Medeiros et al, 2015;Raiesi and Beheshti, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…The responses of soil specific enzyme activities may be clearer than those of the absolute enzyme activities and so could act as indicators to support farmers' decision-making to avoid soil degradation (Medeiros et al, 2015;Raiesi and Beheshti, 2014). Soil specific enzyme activities may act as functional indicators that have immediate ecological implications, and hence could be more easily related to changes in soil microbial community structure (Waldrop et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Responses of absolute and specific soil enzyme activities to long term additions of organic and mineral fertilizer

Zhang

Dong

Dai

et al. 2015

Science of The Total Environment

171

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• Acid phosphatase activity was negatively correlated with soil pH and P content.• βG, NAG, and LAP activities were positively correlated with SOC and Total N contents.• The four enzyme activities were significantly higher under manure than NPK fertilizer.• Enzyme activities were positively correlated with actinomycete and G + bacterium.• We recommend reducing P fertilizer application rates to subtropical paddy soils. G R A P H I C A L A B S T R A C Ta b s t r a c t a r t i c l e i n f o Long-term phosphorus (P) and nitrogen (N) applications may seriously affect soil microbial activity. A long-term field fertilizer application trial was established on reddish paddy soils in the subtropical region of southern China in 1998. We assessed the effects of swine manure and seven different rates or ratios of NPK fertilizer treatments on (1) the absolute and specific enzyme activities per unit of soil organic carbon (SOC) or microbial biomass carbon (MBC) involved in C, N, and P transformations and (2) their relationships with soil environmental factors and soil microbial community structures. The results showed that manure applications led to increases in the absolute and specific activities of soil β-1,4-glucosidase(βG), β-1,4-N-acetylglucosaminidase (NAG), and leucine aminopeptidase (LAP). The absolute and specific acid phosphatase (AP) activities decreased as mineral P fertilizer application rates and ratios increased. Redundancy analysis (RDA) showed that there were negative correlations between absolute and specific AP activities, pH, and total P contents, while there were positive correlations between soil absolute and specific βG, NAG, and LAP enzyme activities, and SOC and total N contents. RDA showed that the contents of actinomycete and Gram-positive bacterium PLFA biomarkers are more closely related to the absolute and specific enzyme activities than the other PLFA biomarkers (P b 0.01). Our results suggest that both the absolute and specific enzyme activities could be used as sensitive soil quality indicators that provide useful linkages with the microbial community structures and environmental factors. To maintain microbial activity and to minimize environmental impacts, P should be applied as a combination of inorganic and organic forms, and total P fertilizer application rates to subtropical paddy soils should not exceed 44 kg P ha −1 year −1 .

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“…The urease activity in soil with poultry litter and cattle manure was also associated with suppressiveness of cassava root black (SILVA et al, 2013), demonstrating the importance of this attribute, which has been considered one of the most sensitive to detect changes in the soil quality (MEDEIROS et al, 2015). The URE is involved in the N cycle, and the concentration of urease varies considerably with differents organic matter.…”

Section: Resultsmentioning

confidence: 99%

Fames and Microbial Activities Involved in the Suppression of Cassava Root Rot by Organic Matter

et al. 2017

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-The incorporation of organic matter has been used to manage of diseases caused by soilborne pathogen, but there is a gap in the use of coffee residues on disease supressiveness. The objective of this study was to evaluate the effect of organic matter sources against cassava root rot caused by F. solani CFF109. Fertilization with coffee residue (CR), cattle manure (CM), earthworm excrements (EE) and goat manure (GM) resulted in suppression of cassava root rot. The treatments of CR and CM presented higher reduction in the cassava disease severity. There were changes in the soil microbial community structure by organic matter incorporation, mainly in total fungi and Gram-negative bacteria populations. The total organic carbon and magnesium are negatively associated with disease severity. The microbial quotient, alkaline and acid phosphatase activities were positively and the biomarker a-15:0 was negatively associated with disease severity. This study indicated that agro-industrial residues can be recycled for providing organic matter and nutrients with effect for management of plant diseases by suppressing soilborne pathogens. This is the first evidence that the industrial residue of coffee can be use in the management of cassava root rot, caused by F. solani.Keywords: Manihot esculenta. Fusarium solani. Coffee residue. Extracellular soil enzyme. Microbial community structure. FAMES E ATIVIDADES MICROBIANAS ENVOLVIDAS

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Absolute and specific enzymatic activities of sandy entisol from tropical dry forest, monoculture and intercropping areas

Cited by 60 publications

References 50 publications

Soil CO2 Efflux Measurements by Alkali Absorption and Infrared Gas Analyzer in the Brazilian Semiarid Region

Soil CO2 Efflux Measurements by Alkali Absorption and Infrared Gas Analyzer in the Brazilian Semiarid Region

Responses of absolute and specific soil enzyme activities to long term additions of organic and mineral fertilizer

Fames and Microbial Activities Involved in the Suppression of Cassava Root Rot by Organic Matter

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