Published in Scientific Papers. Series B, Horticulture, Vol. LXVIV, Issue 2
Written by Gergana MLADENOVA, Boyka MALCHEVA, Milena YORDANOVA
The influence of microbiological and chemical soil indicators on catalase activity in soils under sole and intercropped cabbage cultivation with leek, beans, tagetes, flower mix, and dill has been established. The highest catalase was observed in intercropping cabbage with tagetes (1.63 ml 02/30 min.), while the lowest was found in cabbage and leek (1.20 ml 02/30 min.). A high correlation was found between catalase and the total microflora in the soil (r=0.90), mainly determined by the activity of non-spore-forming bacteria (r=0.71) and mold fungi (r=0.82). A moderate correlation exists between mineralization activity and catalase (r=0.39), as well as between total microflora and mineralization coefficient (r=0.36). The relationship between catalase and ammonium (r=0.53) and potassium ions (r=0.33) is moderate, while no such relationship was found with phosphorus (r=0.02). The dependence between Fe and catalase is also moderate. A weak influence on catalase activity in the variants was observed from the quantity of bacilli (r=0.30) and actinomycetes (r=0.27), as well as from the content of humus (r=0.18) and carbon (r=0.17). There is no positive correlation between pH and catalase (r=-0.24).
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