Ecological Adaptability and Cultivating Techniques of two Festuca Varieties

Festuca arundinacea and F.sinensis are two important Festuca herbs.Their ecological adaptability and cultivating techniques were explored in five different ecological regions,which include northern sub-tropical lowland and the Qinghai-Tibet Plateau.A study was conducted concerning the suitable amount of nitrogenous fertilizer to be applied to Festuca arundinacea crop in the northern sub-tropical lowland to ensure plant stability and fresh yield.The study also analyzed the effect of cover-seeding to the full seedling stand and the compensation growth of F.sinensis in the alpine grassland of the Qinghai Lake rim.The results show that F.arundinacea thrived in the northern arid and semi-arid regions and sub-alpine grassland of up to 2600 m above sea level,but could not survive the winter of Gangcha County,Qinghai Province,which is 3200 m above sea level.An optimal effect was achieved when 337.5 kg/hm~2 urea was applied on the surface of a 2-year Festuca arundinacea grassland located in the northern sub-tropical lowland.Festuca sinensis,adapting readily to the alpine frigid dampness of the northwest,is an ideal Festuca variety for mix sowing.With colewort used as a cover-seeding crop,F.sinensis seedling was well protected,and the compensation effect endured.