生物土壤结皮对一年生植物影响研究进展

生物土壤结皮在荒漠地区广泛分布，它的形成和演替深刻地改变了土壤表层的结构特征和理化性质，进而影响了荒漠地区一年生植物的种子传播、萌发、幼苗存活及生长过程。本文回顾了国内外有关生物土壤结皮对一年生植物影响的研究，综述了生物土壤结皮对一年生植物的土壤种子库、种子萌发、幼苗存活及生长过程的影响，分析了各研究结论中存在争议的原因，总结了生物土壤结皮对一年生植物种子传播、萌发、幼苗存活及生长影响的内在机理，指出了生物土壤结皮对荒漠地区植被组成的筛选作用，并对进一步的研究进行了展望。

Advances and Prospects for the Effects of Biological Soil Crusts on Annual Plants

Biological soil crusts, which are widely distributed in deserts, can affect morphological features and physical-chemical properties of topsoil and thus affect the seed dispersal, seed germination, seedling survival and growth of annual plants. This paper reviews the studies of the interactions between biological soil crusts and annual plants, summarizing internal mechanisms of the effects of biological soil crusts on soil seed bank, seed germination, seedling survival and growth process. The paper also points out that biological soil crusts have a selection on annual plants growing on them and gives some prospects to the further research.