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vol. 6, nr. 1 (2005)
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Intensity of ammonification and nitrification processes in the soil in pig farms
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Bogdan Szostak1, Stefania Jezierska-Tys2, Ewa Bekier-Jaworska1
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1 Agricultural Institute, Szczebrzeska 102, 22-400 Zamość |
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2 Department of Agricultural Microbilogy, Agricultural University, ul. Leszczyńskiego 7, 20-069 Lublin |
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vol. 6 (2005), nr. 1,
pp. 251-260
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abstract:
The paper analyses the content of ammonificators and nitrificators, intensity of processes caused by them in soil, and also the content of ammonium nitrogen, nitrate nitrogen and organic matter around different farm objects. Samples were taken from two layers 0-20 cm and 20-40 cm around the following objects: pen, dunghill, fattening house and organic manure site. Slurry effluents were also investigated, in which the count of bacteria and actinomycetales, fungi, ammonificators and nitrificators were detected. The highest ammonificator count was determined in the top layer of soil 7 m from the organic manure site in farm U (1.6×109). The highest intensity of ammonification took place in both soil layers, at a location 10 m from the dunghill in farm P (I – 13.59 g N-NH4 g-1 and II – 27.63 g N-NH4 g-1). In both analysed farms a dependence between the ammonificator count and ammonification intensification and the content of ammonium nitrogen in soil was observed. The highest nitrification count was determined in both soil layers, 10 m from the dunghill in farm U (1,2×106). Nitrification tempo was the highest in soil collected 5 m from the fattening house in farm U (I-35,95 g N-NO3- g-1 and II-36,54 g N-NO3- g-1). The nitrificator count fluctuated on nitrate nitrogen. No dependence between nitrification count and nitrification intensification was observed. In the studied slurry samples, bacteria and actinomycetales and ammonificators were dominant in comparison to fungi and nitrifying bacteria. Overall, the intensification of both processes depended on the collection place of soil samples. In both farms there were favourable soil conditions, but the presence of fresh organic matter probably had a negative influence on the nitrification process.
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keywords:
soil, pigs farm, objects, ammonification, nitrification
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original in:
Polish
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