<正>调查分析了赣中低山区不同林下植被类型（芒萁型、蕨类型和灌木—芒萁型）对杉林土壤有效态微量元素（硼、钼、铜、锌、铁和锰）状况的影响。指出该地区森林土壤为硼、钼、铜和锰缺乏区，锌潜在缺乏区，铁富集区；与芒萁型林下植被相比，蕨类型林下植被使杉木幼林土壤有效态硼、钼、铜和锌在土壤表层（０～６ｃｍ）发生富集，但表下层含量则趋于降低；对于杉木成林，蕨类型林下植被土壤微量元素状况明显优于芒萁型林下植被。低地位级的杉木幼林通过人工整枝等抚育措施，可促进林下植被的发育，使土壤表层有效态锌、锰含量增加，但同时使土壤表层有效态硼、钼、铜等含量降低，且将更加缺乏。

By means of ecological sequence comprison，the effects of undergrowth on microelements（including B，Mo，Cu，Zn，Fe，Mn）of soils under Chinese fir stand in the central part of Jianxi Province were preliminarily studied Results revealed that the available contents of B，Mo，Cu and Mn of forest soils in this district were very low， those of Zn were at medium level and Fe was very rich Compared with the dicranopteris type undergrowth， the contents of available B， Mo，Cu，Zn in surface soil （0～6 cm） under young Chinese fir stand with pteridophyte type undergrowth increased，but those in subsurface soil（6～30 cm） decreased To the mature Chinese fir stand， the microelements states of soils under pteridophyte type undergrowth were much better than those under dicranopteris type undergrowth To the young Chinese fir stand with low site index（about 14m at the age of 20 years）， pruning could enrich the dicranopteris， the available contents of Zn，Mn in surface soil were enriched， where those of B， Mo，Cu decreased