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Effect of selected micronutrients introduced into soil after sewage sludge application on the growth of poplar trees

100%

Hyblerova K., Losak T.

Zeszyty Problemowe Postępów Nauk Rolniczych

2004

tom 502

nr 2

Until now, there are considerable differences in opinions of both wide public and experts as far as the application of sewage sludge is concerned, especially due to fears concerning their potential contamination with various noxious substances, heavy metals and phytopathogenous germs. Sludge is usually a mixture of mineral and organic sediments, which are trapped during the process of municipal wastewater treatment and contains, among others, also zinc and copper. Both these elements play an important role in growth and development of plants. In our experiments, soil analyses performed 2 to 4 months after application of one or two doses of sludge revealed that the contents of Cu and Zn in soil increased on average by 5.2 - 24.9% as compared to control. However, after one year, their levels decreased to approximately one half and were much lower that the maximum content accepted in light soils in the Czech Republic (i.e. 50 mg·kg⁻¹ and 100 mg·kg⁻¹ for Zn and Cu, respectively). In subsequent years, increasing sludge doses showed a markedly positive effect on the height of poplars (by as much as 63.0 - 106.15%). This means that stabilized and hygienically sound sewage sludge can be used without any problems as a fertilizer for plantations of short rotation energy woody species.

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1 Zeszyty Problemowe Postępów Nauk Rolniczych

1 Hyblerova K.

1 Losak T.

1 2004

Wyniki wyszukiwania

Effect of selected micronutrients introduced into soil after sewage sludge application on the growth of poplar trees