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Effect of compost on the accumulation of heavy metals in fruit of oilseed pumpkin (Cucurbita pepo L. var. styriaca)

100%

Danilcenko H., Gajewski M., Jariene E., Paulauskas V., Mazeika R.

Journal of Elementology

2016

tom 21

nr 1

While it is true that heavy metals accumulate in soil easily, their removal is difficult. The organic fraction of municipal solid waste can be recycled into compost, although frequent application of biowaste may lead to the accumulation of heavy metals in soil. There is no deep-rooted tradition in Lithuania to make and use various biowaste composts, including the ones produced from municipal waste. The objective of this study has been to compare the accumulation of heavy metals in different parts of oilseed pumpkin fruit depending on the chemical composition of the compost the pumpkin plants had been supplied. The content of heavy metals (HM) was determined in the soil before the plant-growing experiment, and in biowaste composts of different origin. Green waste (GW) and municipal solid waste (MSW) composts were applied to soil as fertiliser. Heavy metal concentrations in the skin, flesh and seeds of the analysed pumpkin fruits did not exceed the maximum permissible concentrations established by the EU norms. Seeds of the investigated pumpkin cultivar Olivia are more sensitive to the effect of heavy metal accumulation than the other morphological fruit parts (skin and flesh). The highest amounts of the investigated heavy metals, except Cr, were determined in the seeds, while the lowest ones, except Cu, in the flesh of oilseed pumpkin fruits. The amount of heavy metals in pumpkin biomass was not directly related to their concentrations in the soil, which proves the fact that the transfer of heavy metals from soil to plant is determined primarily by metal bioavailability and by a plant species.

Cattle horn shavings as slow release nitrogen fertilizer

100%

Pekarskas J., Zibutis S., Grazuleviciene V., Grigalaviciene I., Mazeika R.

Polish Journal of Environmental Studies

2015

tom 24

nr 2

An investigation of the chemical composition of cattle horn shavings produced in Lithuania was conducted. The horn shavings were found to consist of 86.62% dry matter, 99.16% organic matter, 39.97% organic carbon, 15.54% N (99.52% of it was in slightly soluble organic compounds), 0.165% P, 0.396% Ca, 0.09% K, 0.049% S, 0.014 % Mg, 6.68 mg kg⁻¹ Cu, 118.0 mg kg⁻¹ Zn, and traces of heavy metals Cr, Pb, and Cd. Elements Ni and Hg were not found in the tested samples. pH value of horn shavings was 7.2. Ammonium nitrogen (NH₄-N) was a prevailing soluble nitrogen compound in the tested samples. The predominant size of horn shavings was within the range of 0.5-2.5 mm (90% of total weight). Our research evidence on the rate of release of water-soluble nitrogen compounds suggests that cattle horn shavings are suitable for use as slow release nitrogen fertilizer. Mineral nitrogen compounds are gradually released from the cattle horn shavings incorporated into soil, thus supplying the plants with nitrogen during the whole growing period.

Comparison of mineral and fatty acid composition of wild and cultivated sea buckthorn berries from Lithuania

86%

Vaitkeviciene N., Jariene E., Danilcenko H., Kulaitiene J., Mazeika R., Hallmann E., Blinstrubiene A.

Journal of Elementology

2019

tom 24

nr 3

Ograniczanie wyników

2 Journal of Elementology

1 Polish Journal of Environmental Studies

3 Mazeika R.

2 Danilcenko H.

2 Jariene E.

1 Blinstrubiene A.

1 Gajewski M.

1 Grazuleviciene V.

1 Grigalaviciene I.

1 Hallmann E.

1 Kulaitiene J.

1 Paulauskas V.

1 Pekarskas J.

1 Vaitkeviciene N.

1 Zibutis S.

1 2019

1 2016

1 2015

Wyniki wyszukiwania

Effect of compost on the accumulation of heavy metals in fruit of oilseed pumpkin (Cucurbita pepo L. var. styriaca)

Cattle horn shavings as slow release nitrogen fertilizer

Comparison of mineral and fatty acid composition of wild and cultivated sea buckthorn berries from Lithuania