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Guo, Yuefeng ， Qi, Wei ， Yao, Yunfeng ， Wang, Juan
2017-01-01 null null 26(卷), null(期), (null页)
The Salix gordejevii Chang et Skv. man-made forests of different ages at the south margins of Horqin Sandy Land, Inner Mongolia is targeted in this paper. The root biomass and carbon contents of S. gordejevii are measured by a hierarchical piece wise digging method, and thereby root carbon stocks were calculated. The distributions of roots and carbon stocks among the age-varying S. gordejevii forests are characterized by a spatial analysis tool Surfer. The root biomass of S. gordejevii first increases and then decreases with the increase of soil depth. More than 80% of root biomass is concentrated at the depth 0-100 cm. The root biomass increases with the prolonging of forest age, and specifically, the total root biomass in the 15-, 25- and 35-year-old forest is 516.50, 4448.60 and 7257.7 g/plant, respectively. The root carbon stocks are distributed in a spindle shape, and increase with the prolonging of forest age. These findings provide theoretical basis and data support for eco-environment construction and improve the carbon sink influence estimation of afforestation in North China.