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1

The influence of multi-year organic and mineral fertilisation on the physicochemical properties of lessive soil

100%
Mazur Z., Sienkiewicz S., Mazur T.
Polish Journal of Soil Science
|
2015
|
tom 48
|
nr 1
In a multi-year field fertilisation experiment the effects of organic and mineral fertilisers on the physicochemical properties of lessive soil were compared. Manure, two doses of slurry and mineral fertilisers were applied to soil farmed in an eight-field crop rotation. Dose 1 of slurry, manure and mineral fertiliser were applied in doses balanced with nitrogen. Dose II of slurry was determined so that the amount of organic carbon introduced along with it was the same as in the dose of manure. To the experimental facilities with manure and slurry, additional fertilisation with phosphorus and potassium was applied. Following 36 years of annual fertilisation, samples of soil were taken from the 0-25 cm layer, determining the amount of organic carbon and the sorption properties of the soil. It was determined that as a result of applying organic fertilisers, the amount of organic carbon, sorption complex capacity and basic cation content increased whereas hydrolytic acidity decreased. Manure was found to have the most beneficial effect, which was matched by neither dose I nor II of slurry. Additional phosphorus-potassium fertilisation of soil with manure and slurry positively influenced the sum of bases and the total sorption capacity of the soil. Mineral NPK fertilisation led to the decrease in the saturation of bases of the sorption complex and the increase in hydrolytic acidity.
2

Numbers and activity of lipolytic microorganisms in podzolic soil under willow culture [Salix viminalis L.] subjected to the multi-year effect of sewage sludge

84%
Furczak J., Joniec J., Baran S.
Polish Journal of Soil Science
|
2008
|
tom 41
|
nr 2
163-173
The study was conducted on podzolic soil from a field fertilised with municipal-industrial sewage sludge at the following doses – 30 (1%), 75 (2.5%), 150 (5%), 300 (10%) and 600 Mg ha⁻¹ (20%) – and then planted with basket willow (Salix viminalisL.). In the 4th, 5th and 9th years of maintaining the plantation, the following determinations were made in the soil: numbers of lipolytic bacteria and fungi, and lipase activity. It was demonstrated that in the 4th and 9th years of the study, for most of the experimental treatments, there was still continued stimulation of the growth of lipolytic bacteria and fungi in soils from the 0-20 cm layer. In that soil layer for all the years of the study there was a distinct stimulation of lipase activity. The positive effect of the sludge on the numbers and activity of the above microbial groups was also observed in soils from the 20-40 cm layer, but only for some of the experimental treatments.
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