Page 114 - Enzymes in Tropical Soils

102 Enzymes In Tropical Soils

Chapter VII:

EFFECTS OF pH ON SOIL ENZYMES

7.1 Relationship between Soil pH and Enzymatic Activities
7.2 Optimum pH and pH Levels for Analysis of Soil Enzymes
7.3 The Shifting of Optimum pH
7.4 Effects of Acidification on Soil Enzymatic Activities
7.5 Manipulating and Regulating Soil pH

s mentioned previously in this book, soil pH is one of the two master
A
variables controlling the soil environment. Along with the soil pE, a
variable indicating the concentration of electrons in the soil environment –
usually also indicated as redox potential –, soil pH may greatly influence
other soil chemical properties, including the soil enzymatic activities. The shifting
of soil pH due to one or more of the various soil internal and external factors may
change the activities of enzymes in soils. Some scientific evidences of the influence
of soil pH on the soil enzymatic activities have been published (Malcolm, 1983;
Reddy et al., 1991; Trasar-Cepeda et al., 1991; Salam et al., 1998d; 1998i; Ekenler
and Tabatabai, 2003).

Abdul Kadir Salam - 2014