In order to investigate effects of ecological transition patterns on the distribution of soil aggregates and organic carbon in jujube economic forest in Lvliang Mountain,five ecological transformation modes were select-ed,namely jujube forest abandoned farmland(AF),jujube forest replanting with Astragalus-Bupleurum(MM),replanting with alfalfa(AL),replanting with Chinese pine(CP),replanting with Platycladus orientalis(PO),and jujube forest under clear-cutting operation was used as the control(CK).The stability of soil aggregates in 0～20 cm soil layer,the organic carbon content of soil and the organic carbon content of soil aggregates in 0～20 cm soil layer were assessed.The results showed that:(1)Except for AF model,other ecological models increased the ratios of＞2.0 mm aggregates and＞0.25 mm aggregates by 3.75％～9.31％and 1.68％～10.36％,respectively.Mean weight diameter and geometric mean diameter were increased by 0.05～0.19 mm and 0.03～0.10 mm,CP treatment performed best.(2)All ecological patterns significantly increased soil organic carbon content by 0.24～4.72 g·kg-1,the increase rate was 9.25％～182.10％,and increased the organic carbon content of soil aggregates of all grain sizes.(3)The contributions of soil organic carbon were mainly from＞0.25 mm aggregates,which were increased by 4.20％～22.96％in all ecological models.(4)The organic carbon content of soil and＞0.25 mm soil aggregates were significantly positive correlated with soil aggregate stability parameters.Soil organic carbon content,＞0.25 mm soil aggregates organic carbon content and soil aggregate stability parameters in the Chinese pine model were the highest in all ecological transformation modes in Lvliang Mountain.
维普
万方数据
