| 1. | In the contrast , soil seed banks of bare patches were extremely small , in different seasons , especially in may and june , even no any seed have been found , mainly due to lowest retaining capacity of surface soil to those abundant seed movement 虽然土壤表面的种子流量巨大,但次生光硷斑对种子的截留能力很低,土壤种子库得不到及时更新与补充,常处于较低水平,尤其在5月份和6月份,土壤中甚至没有种子出现。 |