新麦草在内蒙古干旱草原的建植试验

Establishment of Two Entries of Psathyrostachys juncea in the Arid and Semi-arid Areas in Inner Mongolia.

从美国引进的新麦草Ｂｏｚｏｉｓｋｙ和９０５５８９２在内蒙古干旱半干旱地区旱作条件下的建植水平主要受播种当年降水条件的影响。降水条件较好时可获得成功的建植效果，否则，建植较差。干旱条件下９０５５８９２对建植初期的不同环境表现出不同的建植效果；Ｂｏｚｏｉｓｋｙ则因干旱的抑制作用，对其他环境因素不再敏感。二者在干旱条件下一旦建植，都能很好地生长发育。

he proformance of entries of Psathyrostachys juncea,cultivar Bozoisky and the acces-sion 9055892 indroduced from USA, mostly depend on the precipitation in the seeding year for their growth and establishment in the arid and semi-arid areas of Inner Mon- golia. Both of them hare established successfully uhen seeded in the year(1992 ) re- ceived rainfall as normal, but established poorly when seeded in the rainless year (1991).The accession 9055892 has different stands distinctly at the various habitats under pretty dry conditions. The stand of Bozoisky has no longer to vary with the habi-tat becuase of the inhibition by drought.However,both Bozoisky and 9055892 were able to grow very well once established during drought year.