关键词: 羊草草甸草原, 热值, 能量积累和分配

Abstract: Based on the 1961-2009 meteorological data from 43 stations and the biomass data from 22 observation points in Qinghai Province as well as the future meteorological data estimated under SRES A1B scenario, this paper verified the applicability of Zhou Guang-sheng’s Model in the province, and, by using this model, calculated the vegetation net primary productivity (NPP) on Qinghai Plateau in 1961-2009, 2020s, 2050s, and 2080s. There was a very good correlation between the calculated and measured NPP values, suggesting the good applicability of Zhou’s Model in the province. In 1961-2009, the mean provincial vegetation NPP had an increasing trend, with an increment of 0.067 t·hm^-2·10a^-1, and the regional vegetation NPP varied greatly, with an increment of 0.077-0.147 t·hm^-2·10 a^-1 in eastern Chaidamu Basin and of 0.006-0.030 t·hm^-2·10 a^-1 in most areas of Guoluo. Under the background of climate warming, both the precipitation and the temperature had higher correlations with the NPP, but the influence of precipitation was bigger than that of temperature. In the coming 100 years, the increment of the NPP would be decreased gradually from east to west Qinghai, being 1.35-1.49 t·hm^-2·100 a^-1 in east Qinghai and 0.59-0.73 t·hm^-2·100 a^-1 in west Qinghai, especially in Chaidamu Basin and Three-River Source Area. In 2020s, 2050s, and 2080s, the vegetation NPP in Qinghai Province would have an increment of 2.5-7.0, 2.7-7.5, and 2.9-7.8 t·hm^-2·a^-1, respectively.

Key words: Aneurolepidium chinense grassland, Calorific value, Energy accumulation and allocation