ZESZYT Nr 2 / 2010 Abstrakty Volume No. 2/2010 Abstracts |
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| 7.Microbial and enzymatic
characteristics of soils under pasture mixtures - Stefan
Martyniuk, Jadwiga Oroń, Józefa Harasim Abstract. In the years 2005–2007, twice a year, soil cores (0–20 cm deep x 2.5 cm diameter) were collected from three replicated plots of each of the selected treatments of a fi eld experiment located at Grabów Experimental Station (51o20’58’’ N, 21o39’5’’ E). In this experiment pasture mixtures (white clovergrasses) were established on three fields (sites), about 500–600 m apart, and differing with respect to cropping history (preceding crops). Total numbers (cfu) of bacteria and fungi in soils under pasture mixtures were not signifi cantly infl uenced by the studied factors (preceding crops and seeding rates). Numbers of bacteria from the genus Azotobacter were higher in the soil under pasture mixture grown after ploughed meadow (field III), than after spring barley (field I) and after potato (field II). The soil in field III was richest with respect to SOM and N-NO3 contents and it had pH most favorable for bacteria. Activities of dehydrogenase and phosphatases (acid and alkaline) were highest in the soil under pasture mixtures grown in field III, lower in the soil of field II and the lowest in the soil of field I. key words: bacteria, enzymatic activity, fungi, numbers, soil, pasture mixtures |