EFFECT OF GREEN MANURE ON SOIL ENZYME ACTIVITIES IN RELATION TO SOIL PHYSICAL AND CHEMICAL PROPERTIES PUBLISHEDAlina Dora Samuel, Cornel Domuţa, Maria Şandor
Soil enzyme activities (actual and potential dehydrogenizing, catalase, acid and alkaline phosphatase) were determined in the 0–10, 10–20, and 20–30 cm layers of a preluvosoil submitted to a complex fertilization experiment with different types of green manure. It was found that each activity decreased with increasing sampling depth. It should be emphasized that green-manuring of maize led to a significant increase in each of the five enzymatic activities determined. The enzymatic indicators of soil quality calculated from the values of enzymatic activities showed the order: lupinus + rape + oat > lupinus > vetch + oat + ryegrass > lupinus + oat > rape + lupinus >rape > unfertilized plot. This order means that by determination of enzymatic activities valuable information can be obtained regarding fertility status of soils. There were significant correlations of soil enzyme activities with physical and chemical properties.
catalase; dehydrogenase; green manure; phosphatase; preluvosoil