Change Characteristics of Soil Water Content, Dissolved Organic Carbon/Nitrogen Following Afforestation in Hilly Loess Region
Objective] In order to study the changes of the soil water content ( SWC) , dissolved organic carbon and nitrogen ( DOC/DON) during the vegetation restoration on the Loess Hilly Region of China.[ Method] Robinia pseudoacacia L., Caragana korshinskii Kom, and a-bandoned land, were selected, with slope farmland as control.The seasonal and vertical distribution of SWC and DOC/DON under different kinds of vegetation were studied.[ Result] The results showed that SWC, DOC, and DON were affected by seasonal variations; the SWC showed the increasing after decreasing trend, while both the DOC and DON showed the contrary.Additionally, compared to the farmland, af-forestation greatly increased the SWC, DOC and DON.Furthermore, SWC showed the trend of abandoned land<R.pseudoacacia (CK) at the depth of 0-30 cm; but in the deep soil (30-200 cm), the SWC in forest (R.pseudoacacia and CK) was higher than that in abandoned land.Moreover, significant decrease in DOC and DON were observed from the depth of 0-10 cm to 20-30 cm and significant correlation be-tween SWC and DOC/DON were also showed (P<0.05).[Conclusion] Therefore, this study illustrated the dynamic changes of SWC and dissolved organic carbon/nitrogen in typical vegetation restoration of loess hilly region, which provided a scientific basis for further analyzing and evaluating the soil nutrients status on the Loess Hilly Region of China .
AfforestationSoil water contentDissolved organic carbon/nitrogenDynamic characteristics
国家科技期刊平台
NSTL
万方数据
