从美国引进的七种灌木的出苗及幼苗期观测

THE PRIMARY STUDY ON SEEDING CHARACTER OF SEVEN SHRUBS INTRODUCTED FROM AMERICA

从美国引进伏地肤(Kochiaprostrata)、驼绒藜(CeratoidesIanata)、四翅滨藜(Atriplexcanescens)、三齿冰藜(Atriplextridentata)、内华达麻黄(Ephredranevadensis)、沙生胶兔木(Chrysothamnusnauseosusssp.turbinatus)、黑油脂木(Sarcobatusvermiculatus),进行育苗试验。结果表明:⑴伏地肤经水浸处理、四翅滨藜和内华达麻黄经层积处理后出苗率等有明显提高;⑵伏地肤系列、四翅滨藜-2和沙生胶兔木在4月下旬即可播种,而驼绒藜系列、四翅滨藜-1和黑油脂木则在5月上旬播种更适合;⑶三齿冰藜和沙生胶兔木在施肥处理的土壤上幼苗长势最好;驼绒藜系列对土壤肥力条件要求不严格;伏地肤系列、四翅滨藜系列和黑油脂木在沙质土壤更能发挥它们的生长优势;⑷伏地肤系列、四翅滨藜系列和黑油脂木地上部分生长量高于小叶锦鸡儿。

The Kochia prostrata, Ceratoides ianata,Atriplex canescens,Atriplex tridentate,Ephredra nevadensis,Chrysothamnus,and Sarcobatus vermiculatus which were introduced from America were seeded tentatively. The results showed: ⑴ The germination percentage of Kochia prostrata can be raised through dipping in seeds, while the Atriplex canescens and Ephredra nevadensis should be covered with the sand for raising the percentage. ⑵ Kochia prostrata, Atriplex canescens-2, and Chrysothamnus should seed in the middle of April ,however, Ceratoides ianata, Atriplex canescens-1 and Sarcobatus vermiculatus should seed at the beginning of May. ⑶ The seedling growth of Atriplex tridentate and Chrysothamnus nauseosus ssp.turbinatus were excellent after fertilizering; Ceratoides ianata requested soil and water unstrictly; Kochia prostrata, Atriplex canescens and Sarcobatus vermiculatus grew well in sand. ⑷The above ground growth mass of Kochia prostrata , Atriplex canescens and Sarcobatus v0ermiculatus were higher than that of Caragana mincrophylla.