Study on rehabilitating and rebuilding technologies for degenerated alpine meadow in the Changjiang and Yellow river source region

Situation of alpine meadow degenerated grassland in Changjiang and Yellow river source region was analysed, grassland in this region was divided into four types, including lightly, moderately, heavily and seriously degenerated grassland, and the different measures were applied in research experiments according to differently degenerated stages. Some technologies were used to improving grassland,such as,the lightly and moderately degenerated grassland can be rehabilitated by enclosing, eradicating weeds and fertilizing, and for the heavily degenerated and black soil type degenerated grassland, can be rehabilitated and rebuilt by establishing artificial and semiartificial grassland.