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3. Impact of heavy metals on the oil products biodegradation process

Author

Zukauskaite, Audrone, Jakubauskaite, Viktorija, Belous, Olga, Ambrazaitiene, Dalia, and Stasiskiene, Zaneta

Subjects
Baltic Sea -- Environmental aspects, Petroleum products -- Waste management, Biodegradation -- Analysis, Oil spills -- Environmental aspects, Heavy metals -- Environmental aspects, Environmental services industry
Published
2008

4. Control of Soil pH, Its Ecological and Agronomic Assessment in an Agroecosystem

Author

Karcauskiene, Danute, Repsiene, Regina, Ambrazaitiene, Dalia, Skuodiene, Regina, Jokubauskaite, Ieva, Karcauskiene, Danute, Repsiene, Regina, Ambrazaitiene, Dalia, Skuodiene, Regina, and Jokubauskaite, Ieva

Abstract

Lithuania is located in the humid zone, where mean annual precipitation exceeds mean evapotranspiration and soil acidification is an ongoing natural process encouraged by anthropogenic activities. Traditionally, the process may be controlled by different intensity liming. The chapter summarizes the data on long-term liming and fertilization experiments made in Western Lithuania. The object of the investigation is the naturally acid soil, Bathygleyic Dystric Glossic Retisol (texture: moraine loam with clay-sized particles content of 12–14%), and the same soil exposed for more than half a century to different liming and fertilization intensity. Our systematic analysis shows that it is impossible to reach appropriate moraine loam soil conditions for organic matter decomposition, carbon sequestration, soil aggregation, nitrogen fixation, nutrient accumulation, and plant growth by using intensive liming only. It is necessary to co-ordinate proper liming and organic fertilizing. The soil acidity was neutralized (pHKCl 5.9 ± 0.1) and mobile aluminum abolished in the topsoil and subsoil to a 60 cm depth; moreover, the highest amount of soil organic carbon (1.91%), water stable aggregates (59%), intense nitrogen fixation, and highest grain yield was established in the periodically limed (with 1.0 rate CaCO3 every 7 years) soil with 60 t ha−1 farmyard manure (FYM) application.

Published
2018
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7. EFFECT OF LIMING ON THE DYNAMICS OF WATER-STABLE AGGREGATES AND ORGANIC CARBON IN MORAINE LOAM SOIL.

Author

KARCAUSKIENE, Danute, JOKUBAUSKAITE, Ieva, REPSIENE, Regina, AMBRAZAITIENE, Dalia, and SLEPETIENE, Alvyra

Subjects
*CARBON in soils, *LOAM soils, *SOIL structure, *LIMING of soils, *SOIL amendments
Abstract

The paper summarises the data of field and laboratory trials made in Lithuania (Vezaiciai Branch of Lithuanian Research Centre for Agriculture and Forestry) during the period of 1996-2013. The effect of liming with different intensity (at a rate 0.5 every 7 years and 2.0 every 3-4 years) was investigated in the topsoil of acid moraine loam Bathygleyic Dystric Glossic Retisol on the dynamics of water-stable aggregates and organic carbon. Data showed that systematic liming over 56 years (1949-2005) affected the structure of moraine loam soil. The largest amount (68.4-72.1%) of water stable aggregates (>0.25mm) was determined in the relatively most intensively limed soil when perennial grasses and winter wheat were grown in 2002-2003. During the study period the decrease of water-stable aggregates was appointed in both soil backgrounds: acid (from 57% to 25%) and limed (from 72% to 29%) soil. These data suggest that the climatic conditions (swelling clay under warm and wet conditions in autumn-winter periods and drying and rewetting cycles in springsummer periods) have a substantial negative effect on the aggregates formation. The effect of systematic soil liming on the distribution of soil organic carbon and it's fractional composition was evaluated. Study showed that periodical liming decreased the amount of organic carbon in the soil. Soil organic carbon amount was approximately by 0.11-0.18 persentage points lower compared to the unlimed plots (1.44%). Periodical liming significantly decrease the content of humic and fulvic acids and dissolved organic carbon content, as one of labile fractions of soil organic carbon. Fulvic acids was dominated in the soil in all treatments, that could be associated with a slow humification processes in the soil. [ABSTRACT FROM AUTHOR]

Published
2015

8. Control of Soil pH, Its Ecological and Agronomic Assessment in an Agroecosystem

Author

Karcauskiene, Danute, Jokubauskaite, Ieva, Skuodiene, Regina, Ambrazaitiene, Dalia, and Repsiene, Regina

Subjects
Technology & Engineering / Agriculture / Agronomy / Soil Science
Abstract

Lithuania is located in the humid zone, where mean annual precipitation exceeds mean evapotranspiration and soil acidification is an ongoing natural process encouraged by anthropogenic activities. Traditionally, the process may be controlled by different intensity liming. The chapter summarizes the data on long-term liming and fertilization experiments made in Western Lithuania. The object of the investigation is the naturally acid soil, Bathygleyic Dystric Glossic Retisol (texture: moraine loam with clay-sized particles content of 12–14%), and the same soil exposed for more than half a century to different liming and fertilization intensity. Our systematic analysis shows that it is impossible to reach appropriate moraine loam soil conditions for organic matter decomposition, carbon sequestration, soil aggregation, nitrogen fixation, nutrient accumulation, and plant growth by using intensive liming only. It is necessary to co-ordinate proper liming and organic fertilizing. The soil acidity was neutralized (pHKCl 5.9 ± 0.1) and mobile aluminum abolished in the topsoil and subsoil to a 60 cm depth; moreover, the highest amount of soil organic carbon (1.91%), water stable aggregates (59%), intense nitrogen fixation, and highest grain yield was established in the periodically limed (with 1.0 rate CaCO3 every 7 years) soil with 60 t ha−1 farmyard manure (FYM) application.

Published
2019

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