Carbon and nitrogen cycles in some forest soils related to the humus content and microbial activity
1996
Hysek, J. (Vyzkumny Ustav Lesniho Hospodarstvi a Myslivosti, Jiloviste-Strnady (Czech Republic))
Relations between carbon and nitrogen cycles were studied. The connective factor was the content of humus. There were four different forest stands: spruce, mountain ash, birch and Pinus uncinata. Forest soils have three significant horizons: F - A01, H - A02 and A (F - fermentative, H - humic). Although basic respiration and ammonification were highest from F horizon of Pinus uncinata, its content of humus was very low (17.63 %). The ratio C/N was only about 18 %. Spruce and birch F - horizon had the values of C/N below 20 and the amount of humus was bellow 50 %. In F - A01 mountain ash horizon the value of C/N was 20 and also th level of humus 50 % (59.01). Other results were from H - A02 horizon. The ratios C/N (mountain ash, birch, Pinus uncinata) were 20 and also their humus content was bellow 50 %. Basic respiration was highest in the soil of H - A02 mountain ash horizon but the percent of humus was lowest. The counts of aerobic and aerobic ammonification bacteria were approximately the same in the soil of four forest stands.
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