1. The P.pratensis community is in the phase of herbs and forbs of degraded alpine meadow. At the same time the P.pratensis population is in the dominant spices position,subordinate spices position and company spices position. So,we can replant P.pratensis and other grass seed to change the structure and composition of plant community,improve community environment,cause it to develop to subclimax community succession,reach the stabler state.
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