Abstract: The purpe of this research were to study the interseeding technique on sendmoble sandy pasture in Ordos plateau in Inner Momplia, and to establish an interseeding technique program to be sultable for this reqion.Interseeded forages species were Astragalus adsurgens, Chragana korshinskii Kom., Ihaysaram fruticosum Pall., Agropyron mongolicum andA.desertorvm Schult.Interseeded seed should be coated by the mixture of hygroscoic agent 10~12%, rare earth element 380~45O ×10^-6, ABT root growth powder 18~22 × 10^-6, Increasingyield ndcroorganism 2.7~3.0kg(or L)/hm² and ammonium phosphate 30~4lkg/hm²- Interseeded time was in the middle or last ten day periods of June and July before rainfall-Interseededsite should be in the flat ground between dunes and the facing wind site or lee side of dune wherevegetation cover was more than 20%.After interseed, the nutrients of the soil increased significantly; the vegetatbo cover and yield increased in years.In the third year, the veqetation coverreached to 78%, and .yield reached to 525okg/hm².The vegetatbo cover and yield were 3 timesand 7 times as much as those of first year.The ecological environment ameliorated distinctly.

Key words: Interseed, Semi-mobile sandy pasture, Existing rate of seedlingi Catching rate

摘要： 作者研究了适宜在鄂尔多斯高原半流动沙地草场补播技术及补播草地的生态效益,确定适宜的补播牧草品种、补播时间、补播地形和提高保苗率的方法。结果表明,补播草种以沙打旺、柠条锦鸡儿、羊柴、蒙古冰草和沙生冰草为主,播前用10—12%的保水剂、380～450×10⁶的稀土、18～22×10⁶的ABT生根粉、2.7～3kg(或L)/hm²的增产菌和30～41kg/hm²的磷酸二胺配合制成丸衣种子。在六月中下旬到七月中下旬雨前,选择沙丘迎风波和背风坡底部及丘间平地,植被盖度大于20%的地段补播。补播第三年,植被盖度达到78%,干草产量5250kg/hm²,分别比补播前提高3倍和7倍,流沙移动得到有效控制,生态环境明显改善。

关键词: 补播技术, 保苗率, 改良沙地草场, 丸衣种子