highly significantP < 0.01
elevation, and slope of the observation points are extremely significant ( p< 0.01), and the correlations with slope and latitude are not significant ( p > 0.01); The correlation between the above-ground biomass of meadows and the longitude, latitude and elevation of the observation sites reached a highly significant level ( P < 0.01), while the correlation with slope and gradient was not significant ( P > 0.01).