新疆墨玉县荒漠与绿洲过渡带土壤种子库调查

Investigation on Soil Seed Bank in Desert-oasis Ecotone in Moyu County of Xinjiang

在新疆墨玉县卡瓦克乡荒漠与绿洲的过渡地带对天然植被土壤种子库进行了现状调查,分析了种子库组成、种子库储量、种子库多样性及分布等特征,结果表明:研究区域范围内土壤中活性种子从总储量上来看较低,且随着距离河岸越远,土壤种子库储量下降越快。调查显示,研究区共有10种分属6科的植物,但各植物种的种子数量分配极不均匀,种子库的生活型组成以多年生草本较多,占42.22%左右,1年生草本植物居次,占26.43%,灌木22.49%,乔木占8.86%。该区域自然生态系统十分脆弱,这种种类分部的空间格局,决定了各个地点土壤种子库储量和种类的变化分布不均匀,密度差异较大。

Soil seed bank of natural vegetation in desert-oasis ecotone were investigated in Kawake township of Moyu county in Xinjiang.Distribution,reserves diversity of seed bank were analyzed.Result shows that： within the study area,active seed of the soil is much lower from the point of view of total reserves;with the farther away from the bank,soil seed bank reserve decrease more quickly.Investigation shows that： the study area have total of 10 species of plants belonging to 6 families,but the distribution of number of seeds of plant species is uneven;the life forms of seed banks are mainly perennial herbs,accounting for about 42.22%;the next is the annual herb,accounting for 26.43%;shrubs accounted for 22.49% and trees accounted for 8.86%.The natural ecosystem of this region is very fragile,the spatial pattern of this type of division determines the uneven distribution of reserves types of soil seed bank in various locations,and the densities are quite different.