Influence of soil properties on fluorescein diacetate hydrolyzing activity under different agro-ecosystems

Abstract

Fluorescein diacetate hydrolyzing activity (FDHA) of soils, both in field moist and air dried, of different agro-ecosystems in alluvial soil was studied. Field moist soils recorded higher values than in air-dried soils, but they showed significant positive correlation (0.93∗∗). FDHA in both soil pretreatments showed positive correlation with organic matter (0.98∗∗ for field moist soil and 0.92∗∗ for air-dried soil) and clay content (0.85∗∗ for field moist soil and 0.82∗ for air-dried soil) of the soils. Multiple regression analysis showed that the stabilization of FDHA in the studied soils was due to organic matter-enzyme complex. Among the organic matter fractions, humus C plays dominating role to control the FDHA of the soils.

Keywords:

• Water soluble organic carbon
• humus carbon
• carbohydrate content