关键词: 苔藓植物, 养分含量, 磷库

Abstract: This paper assessed the droughtresisting capacity of Artemisia halodendron,Caragana microphylla,Amorpha fruticosa and Lespedeza bicolor in western Horqin steppe,and approached the rehabilitation of desertified lands there.The results showed that A.halodedron and C.microphylla were more drought-resistant than A.fruticosa and L.bicolor.The application of waterconserving agent,solid water and film cover could increase the survival rate of planted trees by 10%-30%.1.0 m × 1.0 m straw checkboard was appropriate in the local sand-stabilization practice,with the consideration of sandstabilizing effects and cost.The combination of both mechanical and biological measurements could stabilize the sand dune in 2-3 years if sand binder was appropriate.Building enclosure,supplementary sowing,ploughharrowing,and applying fertilizer and soil-improving agent could ameliorate the degraded grassland,and raise the production by 2-4 times.Nitrogen fertilizer could raise the protein content of herbage.After the improvement of degraded grassland,an evident change in soil enzyme activities was detected,showing a good soil condition being built.

Key words: Bryophyte, Nutrient content, Phosphorous pool