Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.
2006
Volume 9
Issue 4
Topic:
Agronomy
ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Gondek K. , Chmiel M. 2006. DYNAMICS OF MINERAL NITROGEN RELEASE AND SOIL SELF-CLEANING PROCESSES AFTER APPLYING FARMYARD MANURE AND SEWAGE SLUDGE, EJPAU 9(4), #19.
Available Online: http://www.ejpau.media.pl/volume9/issue4/abs-19.html

DYNAMICS OF MINERAL NITROGEN RELEASE AND SOIL SELF-CLEANING PROCESSES AFTER APPLYING FARMYARD MANURE AND SEWAGE SLUDGE

Krzysztof Gondek1, Maria Chmiel2
1 Department of Agricultural Chemistry, Agricultural University of Cracow, Poland
2 Department of Microbiology, Agricultural University of Cracow, Poland

 

ABSTRACT



The study of the dynamics of nitrogen mineral forms release (to soil solution) and changes in the number of bacteria of the family Enterobacteriaceae (Salmonella) was carried out on the base of a model incubation experiment. The research was conducted in three soils: weak loamy sand (I), sandy loam (II) and moderate loam (III). The reaction of the soils used in the experiment decreased gradually, irrespective of applied fertilization and liming. The highest content of N-NH4+ in soils was recorded in initial periods of the study, which was an effect of organic matter mineralization process. An increase in N-NO3‾ content applied to all the soils tested, and the rate of N-NO3‾ growth after applying sewage sludge and farmyard manure was the largest in weak loamy sand. Applying the mixture of sewage sludge with peat resulted in a decrease in growth rate of nitrate nitrogen content in the soils tested. Limited uptake of nitrate anions may result in washing out this nitrogen form from the rhizosphere. The population of bacteria of the genus Salmonella decreased to the level indeterminable after 64 days of incubation.

Key words: soil, nitrogen, farmyard manure, sewage sludge, Salmonella.

Krzysztof Gondek
Department of Agricultural Chemistry,
Agricultural University of Cracow, Poland
Al. Mickiewicza 21, 31-120 Cracow, Poland
email: kgondek@ar.krakow.pl

Maria Chmiel
Department of Microbiology,
Agricultural University of Cracow, Poland
Mickiewicza 24/28, 30-059 Cracow, Poland
email: rkm@ar.krakow.pl

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