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通过小支撑多样点选择研究样地、深层次土壤取样和幼苗萌发法等试验方案,探讨了金沙江干热河谷区云南东川野鸭塘小流域土壤种子库植被恢复潜力,研究表明:在0～40 cm深层次土层中,不同土地类型土壤种子库种子萌发潜力大小依次是沟道、荒草地、林地、灌木地.随着土壤层次深度的增加,不同土地类型土壤种子库萌发潜力差异显著,林地、沟道土壤种子库萌发潜力表现为表聚特征,萌发种子主要集中在0～5 cm的表土层;灌木地土壤种子库萌发的种子比较均匀地分布在0～40 cm土层中,表现为明显的均匀化特征;荒草地土壤种子库萌发的种子在0～5 cm表土层相对较少,主要集中在5 cm以下的土层中,种子下聚特征突出.在20～40 cm深层次土层中种子萌发潜力表现为荒草地最大,灌木地、沟道次之,林地最小.
Through the experimental plots of small sample selection of small supports, deep soil sampling and seedling germination test, the recovery potential of soil seed bank vegetation in Yegawa small watershed of Dongchuan, Yunnan in the Jinsha River dry-hot valley was studied. The results showed that in 0 ~ 40 cm soil depth, the seed germination potential of soil seed bank of different land types followed by channel, grassland, woodland and shrub land.The soil seed bank of different land types showed significant differences in germination potential with the increase of soil depth, , And the germination potential of channel soil seed bank was characterized by surface aggregation. The germinating seeds mainly concentrated in the topsoil layer 0 ~ 5 cm. The seeds germinated in shrub soil seed bank were distributed more evenly in 0 ~ 40 cm soil layer Obvious homogenization characteristics.The seeds germinated in the soil seed bank of wild grassland were relatively less in the 0-5 cm soil layer and mainly concentrated in the soil layer less than 5 cm, Seed germination potential in the layer showed the largest grassland, shrub land, followed by the channel, the smallest forest.