_天然草原等级评定技术规范_
3/2008草 业 科 学(第25卷3期) 107
Introduction and cultivation of lawn cover plants planted in heavy alkali salinity soil
in Ekenhudouge town of Inner Mongolia
WANG Qi, YAO Ze
(Gansu Key Laboratory of Deser tificatio n Combating, Gansu Desert Control
Research Institute, Wuw ei 733000, China)
Abstract:Trials w ere co nducted in Ekenhuduge tow n o f Alashan Yo u co unty of Inner Mong olia, Fine sand and thor oug hly decom posed sheep manur e w ere applied o n the sulphuric salinity soil to impr ove the soil. herbaceous plants, such as I ris ensata, M edicago sativ a , and Festuca elata etc. w ere plan ted. Research on the compar ison of their adaptability reveals:w ithin the 60cm deep soil layer, salt content and pH value of the soil w hich is mixed w ith fine sand (the ratio betw een original soil and fine sand is 2 1) are obviously low er than that of the non treatm ent soil (P 0. 05) so il. The perfo rmance of introduced plants grow n in the soil mix ed w ith fine sands (P 0. 05) . So it can be concluded that apply ing fine sand in the so il is an effective measure to improv e soil, and its effect is significant. Salt stress can w eak the g erm ination potential, germination rate and vitality of the seeds in the trial. T he co mprehensive analysis of the adaptability of seeds in the tr ial indicated that the adaptability of seeds, fr om strong to w eak, are I. ensata >M. sa tiva >F. elata . T he averag e survival ratio o ver w inter of Iris ensata and M. sativa are o bviously hig h er than that of F. elata (P 0. 05).
Key words:Ekenhudo ug e tow n; heavy alkali salinity soil; mix ture w ith sand; decay sheep ex crement; law n cover plant; introduction and cultivation
32