The Effects of Different Tamarix Shrubs Communities on Spatial Distribution of Soil Enzyme Activities in Yellow River Delta
In this study,the Tamarix-Suaeda and Tamarix-Gramineae shrub communities in the new wetland of the Yellow River Delta(YRD)are chosen to study the soil enzyme activities spatial distribution characteristics and the relationship between soil enzyme activity and physicochemical properties.The results show that urease activity in Tamarix-Gramineae shrub communities decreases as the distance from the center of the shrub and/or the soil depth increases,with the maximum value 0.376.As the distance from the center of the shrub increases,the soil enzyme activities of Tamarix-Suaeda shrub communities reduce and then increase,at the same time,increase and then de-crease as the soil depth increases,with the maximum value 0.271.Urease activity is significantly concentrated at the canopy and the canopy edge of the Tamarix-Gramineae communities,and the maximum concentration factors are 1.68 and 1.47,respectively.However,there is no significant enrichment of soil enzyme activity in the Tamarix-Suaeda community.Catalase activity in Tamarix-Gramineae and Tamarix-Suaeda shrub communities all increase and then decreased as the soil depth increases,and maximum values are 1.352 and 1.602,respectively.As the dis-tance from the center of the shrub increases,they exhibit different patterns,and the maximum values are 1.2 and 1.3,respectively.There is no significant enrichment of catalase activity in the two types of Tamarix shrub communi-ties.The soil enzyme activity of the two types of Tamarix shrub communities has a significant positive correlation with soil moisture,soil organic carbon,pH and negative correlation with electric conductivity(EC).Tamarix shrub communities have certain aggregation to enzymes,which is conducive to constructive community succession and pro-vides data support for ecological sustainability and soil improvement in the Yellow River Delta region.
TamarixshrubYellow River Deltaenzyme activitysuccession
NETL
NSTL
万方数据
