Effects of fertilization on characteristics of Maqu alpine meadow communities and production

Abstract: For the purpose of verifying the effection of alpine meadows plant community characteristic and production of Maqu under organic fertilization, the reaserch compared four different fertilization treatments（S0 no fertilizer, S1 fertilization of 11.25 t/ha, S2 fertilization of 22.5 t/ha; S3 fertilization of 33.75 t/ha). The results showed that:(1) the vegetation cover degrees of S1 and S3 were significantly higher than that of S0, the vegetation heights of S1 and S2 were less than S0;(2) The total biomass of plant communities showed an increasing trend but with no significant difference, as far as the response of functional groups was different of Sedge biomass of S1, S2, and S3, and the proportion of total biomass were significantly different with the S0 in which Cyperaceae and Graminea biomass showed a decline trends.(3) The Pielou index of S1, S2, S3 decreased compared with that of S0, The Simpson index of S1 and S3 decreased significantly compared with that of S0.