Effect of Vegetation Restoration on Soil Aggregates Enzyme Activity in Typical Black Soil Region
The experiment was conducted to explore the differences of enzyme activities between homogenized soil and dry-sieved aggregates and reveal the effects of vegetation restoration on hydrolase activities in soil aggregates, and the topsoil in typical black soil region from Larix gmelini plantations at 14, 23 and 50 year-old and from farm-land was collected and compared by determining invertase, β-D-glucosidase, phosphatase activities, geometric mean of enzyme activities (Mg) and other related soil properties.The enzyme activity in homogenized soil was significantly (P<0.05) lower than those in aggregates, representing an obvious protective effect of aggregates on soil enzymes.Vegetation restoration improved enzyme activities both in homogenized and aggregates to various degrees and enzyme activities occlude in aggregates smaller than 1.00mm with P<0.05, and other comprehensive indexes were also parallel higher.Therefore, enzyme activities within d≤1.00mm size aggregates could be used as a sensitive index to quantitatively characterize the quality changes of soil habitat in black soil regions.
Black soilVegetation recoveryAggregatesEnzyme activity
NETL
NSTL
万方数据
维普
