A simple, sensitive and rapid radiorespirometric estimation of soil enzymatic activity

1993 ◽  
Vol 171 (2) ◽  
pp. 457-463 ◽  
Author(s):  
S. J. Khurshid
Keyword(s):  
Enzymatic Activity ◽  
Soil Enzymatic Activity

ASSESSMENT OF GRAY FOREST SOIL ENZYMATIC ACTIVITY IN AGRICULTURAL SYSTEMS

2019 ◽  
Keyword(s):  
Enzymatic Activity ◽  
Environmental Sustainability ◽  
Hydrolytic Enzymes ◽  
Invertase Activity ◽  
Phosphorus Cycle ◽  
Soil Enzymatic Activity ◽  
Urease Enzyme ◽  
Natural Analogues ◽  
Activity Of Enzymes ◽  
The Impact

On the grey forest medium-loamy soil of Vladimir Opolye region we have studied the impact of various methods of basic cultivation and fertilizer systems on the activity of redox and hydrolytic enzymes: ure-ase (nitrogen cycle), invertase (carbon cycle), phosphatase (phosphorus cycle), and catalase, involved in the cycle of carbon in the soil. The second humus horizon with capacity of 19-24cm was found at the depth of 20 - 21 cm on the experimental field. We have studied three modes of basic soil cultivation: an-nual shallow flat plowing (6-8 cm), annual deep flat plowing (20-22 cm), and annual moldboard plowing (20-22 cm) with normal and intensive application of fertilizers. The most enzymatically active layer is 0-20 cm. No relevant difference has been found in the level of enzymes activity between variants of basic soil treatment. Activity of enzymes increases with application of fertilizers on the intensive background. In agrogenic soils, soil enzymatic activity is lower on average by 16-22% compared to the soil of the res-ervoir. The biggest negative transformation of activity has been observed at the urease enzyme (up to 50%). With annual moldboard plowing on the intensive backgroung, enzyme activity has been close to the natural level – 98.4%. Catalise and invertase activity in this case were found to be higher (105 and 116% respectively) than that of natural analogues. Activity of enzymes increases with intensive application of fertilizers as compared with normal background. This is particularly evident with 6-8cm deep beardless plowing and 20-22cm deep moldboard plowing. In general, the obtained biochemical indicators charac-terize the highest environmental sustainability of this variation within our research.

Influence of crop rotation, intermediate crops, and organic fertilizers on the soil enzymatic activity and humus content in organic farming systems

2013 ◽  
Vol 46 (2) ◽  
pp. 198-203 ◽  
Author(s):  
A. Marcinkeviciene ◽  
V. Boguzas ◽  
S. Balnyte ◽  
R. Pupaliene ◽  
R. Velicka
Keyword(s):  
Enzymatic Activity ◽  
Organic Farming ◽  
Crop Rotation ◽  
Humus Content ◽  
Farming Systems ◽  
Organic Fertilizers ◽  
Soil Enzymatic Activity ◽  
Organic Farming Systems

scholarly journals Effect of Enriched Composts on Rhizosphere Soil Enzymatic Activity of Soybean in Vertisols

2017 ◽  
Vol 6 (10) ◽  
pp. 105-111
Author(s):  
Ashay D. Souza ◽  
P.W. Deshmukh ◽  
S.M. Bhoyar
Keyword(s):  
Enzymatic Activity ◽  
Rhizosphere Soil ◽  
Soil Enzymatic Activity

SOIL MICROBIAL BIOMASS AND ENZYME ACTIVITIES RESPONSE TO COPPER AND MOLYBDENUM POLLUTION IN THE VICINITY OF ZANGEZUR COPPER AND MOLYBDENUM COMBINE, ARMENIA

2020 ◽  
Vol 54 (3 (253)) ◽  
pp. 235-245
Author(s):  
K.A. Ghazaryan ◽  
H.S. Movsesyan
Keyword(s):  
Microbial Biomass ◽  
Enzymatic Activity ◽  
Enzyme Activities ◽  
Soil Microbial Biomass ◽  
Negative Impact ◽  
Chemical Elements ◽  
Extracellular Enzyme ◽  
Soil Biological Activity ◽  
Soil Enzymatic Activity ◽  
Soil Microbial

The aim of this study was to define a relationship between heavy metal (Cu, Mo) pollution of soil and various extracellular enzyme activities. Six enzymatic activities involved in cycles of carbon, nitrogen, phosphorus and sulfur (β-glucosidase, chitinase, leucine-aminopeptidase, acid phosphomonoesterase, alkaline phosphomonoesterase, and arylsulphatase) as well as microbial biomass were determined in soil samples collected in the surroundings of Zangezur Copper and Molybdenum Combine. The investigations showed that pollution of soil with copper and molybdenum led to a decrease in microbial biomass and soil enzymatic activity, which in turn had a negative impact on cycles of chemical elements, in particular C, P, N and S. This gives reason to conclude that the changes in soil microbial biomass and enzymatic activity may act as indicators of soil biological activity and quality.

scholarly journals Effect of Pesticides on Enzymatic Activity in Soil

2018 ◽  
Vol 75 (2) ◽  
pp. 80
Author(s):  
Maria- Mihaela MICUȚI ◽  
Liliana BĂDULESCU ◽  
Florentina ISRAEL-ROMING
Keyword(s):  
Acid Phosphatase ◽  
Enzymatic Activity ◽  
Biological Indicator ◽  
Enzymatic Activities ◽  
Soil Enzymatic Activity ◽  
Alkaline And Acid Phosphatase

The focus of this article is to provide informations about soil enzymatic activity as a biological indicator for impacts of pesticides on soils. In this experiment, an ecological soil was treated with two types of fungicide (Ridomil Gold and Bravo 500) and two of insecticides (Mospilan 20SG and Vertimec 1.8% EC). The pesticides were assessed for their effect on different enzymatic activities. They were administrated over a 28 days period and the samples of soil were taken once every 7 days and analyzed in the laboratory. For each sample was determined the enzymatic activity, pH, humidity. The enzymatic activity was assessed using colorimetrical methods. Enzymes chosen for this study were cellulase, amylase, xylanase, urease, alkaline and acid phosphatase. Results shown that the enzymatic activity can increase or decrease when the soil was treated with the fungicides and insecticides chosen for this experiment.

scholarly journals Soil Resistance to Burn Severity in Different Forest Ecosystems in the Framework of a Wildfire

Forests ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 773
Author(s):  
Sara Huerta ◽  
Víctor Fernández-García ◽  
Leonor Calvo ◽  
Elena Marcos
Keyword(s):  
Enzymatic Activity ◽  
Forest Ecosystems ◽  
Resistance To Change ◽  
Chemical Properties ◽  
Resistance Index ◽  
Biochemical Properties ◽  
Burn Severity ◽  
Total N ◽  
Organic C ◽  
Soil Enzymatic Activity

Recent changes in fire regimes, with more frequent, extensive, and severe fires, are modifying soil characteristics. The aim of this study was to evaluate the effect of burn severity on the resistance of some physical, chemical, and biochemical soil properties in three different forest ecosystems affected by a wildfire in the northwest of the Iberian Peninsula. We evaluated burn severity immediately after fire using the Composite Burn Index (CBI) in three different ecosystems: shrublands, heathlands, and oak forests. In the same field plots used to quantify CBI, we took a composite soil sample to analyse physical (mean weight diameter (MWD)), chemical (pH; total C; total organic C (TOC); total inorganic C (TIC); total N; available P; exchangeable cations Na+, K+, Mg2+, and Ca2+; and cation exchange capacity (CEC)), and biochemical (β-glucosidase, urease, and acid phosphatase enzyme activities) properties. The resistance index of each property was then calculated. Based on our results, the values of the soil chemical properties tended to increase immediately after fire. Among them, total C, TOC, and exchangeable Na+ showed higher resistance to change, with less variation concerning pre-fire status. The resistance of chemical properties was higher in the oak forest ecosystem. MWD decreased at high severity in all ecosystems, but soils in shrublands were more resistant. We found a high decrease in soil enzymatic activity with burn severity, with biochemical properties being the least resistant to change. Therefore, the enzymatic activity of soil could be a potential indicator of severity in forest ecosystems recently affected by wildfires.

Fertilization regulates soil enzymatic activity and fertility dynamics in a cucumber field

2008 ◽  
Vol 116 (1) ◽  
pp. 21-26 ◽  
Author(s):  
Lijuan Yang ◽  
Tianlai Li ◽  
Fusheng Li ◽  
J. Hugo Lemcoff ◽  
Shabtai Cohen
Keyword(s):  
Enzymatic Activity ◽  
Soil Enzymatic Activity

Long-term effects of fertilizer on soil enzymatic activity of wheat field soil in Loess Plateau, China

Ecotoxicology ◽  
2014 ◽  
Vol 23 (10) ◽  
pp. 2069-2080 ◽  
Author(s):  
Weigang Hu ◽  
Zhifang Jiao ◽  
Fasi Wu ◽  
Yongjun Liu ◽  
Maoxing Dong ◽  
...  
Keyword(s):  
Enzymatic Activity ◽  
Loess Plateau ◽  
Field Soil ◽  
Long Term Effects ◽  
Wheat Field ◽  
Soil Enzymatic Activity

scholarly journals Soil Enzymatic Activity under Different INM Practices in Rice-Rice Cropping System

2020 ◽  
Vol 9 (6) ◽  
pp. 1073-1080
Author(s):  
P.V. Geetha Sireesha ◽  
G. Padmaja ◽  
M. Venkata Ramana ◽  
P.C. Rao
Keyword(s):  
Enzymatic Activity ◽  
Cropping System ◽  
Soil Enzymatic Activity
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