Abstract:

In order to study the effects of fertilization on aboveground biomass, a field experiment was conducted including 8 fertilization treatments: CK (no fertilization), organic manure (O), nitrogen (N), phosphate fertilizer (P), nitrogen and phosphate fertilizer (NP), organic manure and nitrogen (ON), organic and phosphate fertilizer (OP), and the organic manure, nitrogen and phosphate fertilizer (ONP). The coverage and aboveground biomass had been studied through quadrat sampling method in this paper. The results showed that the coverage of ONP treatment increased by 7% compared with CK and had maximum aboveground biomass in 2006 and 2007. The aboveground biomass of all fertilization treatments in 2007 was significantly higher than in 2006 in different growing seasons. The treatment of nitrogen, phosphorus and organic fertilizer (ONP) reached the most significant effect among all treatments in Maqu alpine desertification meadow.