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Evaluation of the changes induced by gasification biochar in a peat-sand substrate

100%

Muter O., Lebedeva G., Telysheva G.

International Agrophysics

2014

tom 28

nr 4

Gasification biochar represents one of the biochar types tested for agricultural needs. The aim of this study was to clarify the physico-chemical and biological changes occurring in a peat-sand substrate amended with hardwood-derived gasification biochar in the rates of 2, 4 and 20 g l-1. The pH(H2O) of the substrate with 4 g l-1 and 20 g l-1 biochar was increased from 5.6 to 6.2 and 6.7, respectively. The testing of the substrate in the re- spirometry device showed that the increase in the biochar rate led to a decrease in the amount of CO2 evolved at the maximum pressure drop. The continuous decrease in pressure observed in the respirometry bottles filled with pure biochar allows explaining this effect by biochar sorption activity. Addition of 2 and 4 g l-1 biochar to the peat-sand substrate stimulated the growth of cucumbers in an 18-day pot vegetation experiment. An increase in the number of root tips and root volume with a decreasing average root diameter was shown in the presence of biochar. Stimulation of plant growth on the background of low rates of biochar requires a further study with emphasis on the specific combination of biochar, soil type, plant species, and climatic conditions.

Soil organic matter as a factor reducing the harmful effects of acid rain

80%

Prusinkiewicz Z., Kwiatkowska A., Pokojska U.

Folia Forestalia Polonica. Series A . Forestry

1991

tom 33

Copper distribution and quantity-intensity parameters of highly contaminated soils in the vicinity of a copper plant

80%

Diatta J. B., Kocialkowski W. Z., Grzebisz W.

Polish Journal of Environmental Studies

2000

tom 09

nr 5

355-361

Four soil samples were collected in areas adjacent (sanitary zone) to the Głogów Copper Plant (Poland). They were mostly acidic (pH 4.55 - 4.71) and the total varied widely in their total copper content from 17.03 to 44.07 cMc/kg. The basic copper fractions were determined according to McLaren and Crawford sequential extraction method. Copper of the solution (intensity) expressed as the equilibrium activity ratio, ARoCu when Cu was neither gained nor lost (that is DCuo = 0) as well as labile Cu (LCu) was related to the solid soil phase (quantity) considered as the buffering capacity (BCCu) of the given soils were calculated. The Q/I parameters were estimated at two ionic strengths: 0.005 and 0.010M CaCl2. It was found that all parameters depended on the ionic strength and higher values were obtained at 0.010M CaCl2. An adverse case occurred for the energy of replacement of calcium by copper (DF). Soil properties primarily influenced the magnitude of the Q/I parameters and secondly the high levels of exchangeable and labile soil copper. The low affinity of these soils for copper estimated by the Gapon selectivity coefficients (KG) supported this assumption.

Ograniczanie wyników

1 Folia Forestalia Polonica. Series A . Forestry

1 International Agrophysics

1 Polish Journal of Environmental Studies

1 Diatta J. B.

1 Grzebisz W.

1 Kocialkowski W. Z.

1 Kwiatkowska A.

1 Lebedeva G.

1 Muter O.

1 Pokojska U.

1 Prusinkiewicz Z.

1 Telysheva G.

1 2014

1 2000

1 1991

Wyniki wyszukiwania

Evaluation of the changes induced by gasification biochar in a peat-sand substrate

Soil organic matter as a factor reducing the harmful effects of acid rain

Copper distribution and quantity-intensity parameters of highly contaminated soils in the vicinity of a copper plant