scholarly journals Post-pyrogenic changes in the properties of grey forest podzolic soils of ecogeosystems of pine forests under conditions of anthropogenicloading

2018 ◽  
Vol 27 (2) ◽  
pp. 175-183 ◽  
Author(s):  
V. Asotskyi ◽  
Y. Buts ◽  
O. Kraynyuk ◽  
R. Ponomarenko
Keyword(s):  
Chemical Composition ◽  
Chemical Elements ◽  
Chemical Properties ◽  
Heavy Metal Concentration ◽  
Forest Litter ◽  
Negative Influence ◽  
Exchange Cations ◽  
Chemical Properties Of Soils ◽  
Physical And Chemical ◽  
And Chemical Properties

This article presents the analysis of results of experimental data of postpyrogenic change of soils of ecological systems of pine forests.Ground fires transform the surface organogenic horizons of soils. The negative influence of low-intensity fires of different intensity on the change of humus stock, qualitative fractional composition of organogenic soil horizons and their chemical composition is shown.Post-pyrogenic transformations of physical and chemical soil characteristics are found, which are not simply their corresponding reaction to the pyrogenic effect, but a clear signal reflecting the state of the soil immediately after the fire, taking into account its strength and intensity, and after a certain period of time. There is a certain dependence of the degree of pyrogenicity on the duration of the effect of fire on the soil. The recent influence of a medium intensity fire on the soil is marked by a clear reaction of the complex of its properties.Physical and chemical properties of soils after fires deteriorate: humus burns, the content of nitrate nitrogen decreases.Forest fires sharply change the morphological state of the upper part of the soil profile. The nature of the surface horizons of soils changes, a new pyrogenic horizon is formed, which differs from natural analogues in terms of physical and chemical properties and the content of ash elements. Under the influence of fire there are changes in such properties as: pH, content of exchange cations, gross and moving forms of nitrogen, etc.The heavy metal concentration in surface horizons increases several times and exceeds the background values due to the mineralization of forest litter and herbaceous vegetation from the combustion and subsequent migration of chemical elements , which presents an environmental hazard.The change in the chemical composition of soils can create conditions for the impossibility of the existence of a root ecosystem, its death, and development, after a certain time, of another modified ecogeosystem.

scholarly journals Physical and chemical properties of soils in different physiographic environments in the southern Amazonas region

2019 ◽  
Vol 35 (4) ◽  
Author(s):  
Willian Barros Nascimento ◽  
Milton César Costa Campos ◽  
Bruno Campos Mantovanelli ◽  
Luís Antônio Coutrim dos Santos ◽  
José Mauricio Cunha ◽  
...  
Keyword(s):  
Particle Density ◽  
Broad Class ◽  
Chemical Properties ◽  
Principal Component ◽  
Available Phosphorus ◽  
Physical And Chemical Properties ◽  
Dry Land ◽  
Chemical Properties Of Soils ◽  
Physical And Chemical ◽  
And Chemical Properties

The Amazon region has a great diversity of landscapes such as forests galleries, natural fields (“Cerrados Amazônicos”), dense forest, these environments made possible the formation of a broad class of soils over time. The aim of this study was to evaluate the physical and chemical properties of soils in different physiographic environments in southern Amazonas, Brazil. Three areas of representative physiographies were selected, all of them in natural conditions: natural field / forest and floodplain / dry land transitions, and corrugated relief areas. Soil samples were collected in layers of 0.0 to 0.20 and 0.80-1.0 m. From the samples collected the following physical analyzes were performed: particle size, bulk density, particle density, total porosity and saturated hydraulic conductivity; and chemical: exchangeable calcium, magnesium, aluminum and potassium available, phosphorus, potential acidity, pH and organic carbon. Based on the results of chemical analysis were calculated the sum of bases and base saturation. The results were submitted to multivariate statistics analysis, at the discretion of the principal component analysis (PCA). From the results it is clear that different physiographic environments studied influence the formation of different soil classes, featuring the diversity of Amazonian soils. The PCA allowed the distinction and formation of different similarity groups, thus enabling to relate the physical and chemical properties with the physiographic formation in which they are inserted.

scholarly journals An experimental study on the effects of freeze–thaw cycles on phosphorus adsorption–desorption processes in brown soil

RSC Advances ◽  
2017 ◽  
Vol 7 (59) ◽  
pp. 37441-37446 ◽  
Author(s):  
Qingzhi Wang ◽  
Jiankun Liu ◽  
Lingqing Wang
Keyword(s):  
Experimental Study ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Phosphorus Adsorption ◽  
Soil P ◽  
Freeze Thaw ◽  
Chemical Properties Of Soils ◽  
Adsorption Desorption ◽  
Physical And Chemical ◽  
And Chemical Properties

Freeze–thaw cycles (FTCs) can strongly influence the physical and chemical properties of soils in cold regions, which can in turn affect the adsorption–desorption characteristics of phosphorus (P) in the soil.

scholarly journals Studies on Some Pedological Indices, Nutrient Flux Pattern and Plant Distribution in Metropolitan Dumpsites in Uyo, Akwa Ibom State

2013 ◽  
Vol 1 (02) ◽  
pp. 40-45
Author(s):  
Felix Ogbemudia ◽  
Emem Mbong
Keyword(s):  
Chemical Properties ◽  
Nutrient Flux ◽  
Soil Samples ◽  
Plant Distribution ◽  
Physical And Chemical Properties ◽  
Nutrient Profile ◽  
Permissible Range ◽  
Chemical Properties Of Soils ◽  
Physical And Chemical ◽  
And Chemical Properties

The physical and chemical properties of soils and plants distribution in metropolitan dumpsites in Uyo, Nigeria were studied. Soil samples were collected from two popular dumpsites and analysed using standard scientific procedures. The Results showed that there were slight desparities in the nutrient profile of these dumpsites. Generally, the nutrients levels were high and soil heavy metals concentration were found to be within permissible limits. This study also revealed the monospecific nature of dumpsite 1 and higher species presence corresponding with increased nutrient levels in dumpsite site 2. This study encourages the use of dumpsites soils for agricultural purpose(s) when the soil heavy metal falls within permissible range.

scholarly journals Study of Heavy Metals in the Soils of Two Localities in Dolj County

2018 ◽  
Vol 1 (1) ◽  
pp. 352-357
Author(s):  
Gilda-Diana Buzatu ◽  
Ana Maria Dodocioiu
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Wastewater Treatment ◽  
Chemical Composition ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Chemical Properties ◽  
Chemical Parameters ◽  
Physical And Chemical ◽  
And Chemical Properties

Abstract The study was conducted in two neighboring localities located in the northern county of Dolj, namely Murgasi and Bulzesti. The purpose of the study was twofold: namely, the study of heavy metal loading in order to identify possible pollution areas and to know the soil content of these localities in heavy metals in order to be able to give the verdict on the use of sludge from Craiova wastewater treatment plant as fertilizer on these soils. In order to determine the suitability of sewage sludge from the Craiova wastewater treatment plant as a fertilizer, physical and chemical properties and heavy metal content of the soils in these areas were analysed, as well as the chemical composition of sludge, according to Order 344/2004 of the Ministry of Environment and Water Management of Romania, respectively 13 physical and chemical parameters of the soils in these localities and the chemical composition of the sludge and respectively the quantity of heavy metals to be introduced annually into the soil by using it.

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