2.2. Plots and treatments
We selected the typical Robinia pseudoacacia as the research
object in the loess hilly region, which was the key area for the
restoration and reconstruction of ecological environment. In
mid-September, 2012, Robinia pseudoacacia with four kinds of
stand age (CH10a, CH20a, CH30a, CH40a) and the same soil type (Loessal
Soil) were selected in the Zhifanggou watershed. At the same time, slope
crop land was selected as the control for
explaining the effect of
soil different environment on soil carbon flux. The vegetation and
topographical features of different plot are shown in Table 1.