EFFECTS OF DIFFERENT NITROGEN FERTILIZERS ON ALPINE MEADOW ABOVE-GROUND BIOMASS AND SOIL NUTRIENTS
The paper explored the effects of six fertilizer gradients of calcium nitrate and urea on alpine meadow above-ground biomass and soil nutrients.The results showed that alpine meadow fresh weight,dry weight,soil total nitrogen,soil total phosphorus,soil ammonium nitrogen,soil nitrate nitrogen were 569.07 kg·hm-2,230.19 kg·hm-2,24.31g·kg-1,0.92 g·kg-1,0.065 g·kg-1 and 0.950 g·kg-1,which were the maximum values when calcium nitrate fertilizer application was200 kg·hm-2.when the application rate of urea was 100 kg·hm-2,fresh weight,dry weight were 463.18 kg·hm-2 and201.52 kg·hm-2,which were higher and significantly increased 1.09 times and 1.23 times and higher than other treatments.alpine meadow soil total phosphorus,soil ammonium nitrogen,soil nitrate nitrogen were not significantly higher under different urea fertilization gradients.
万方数据
维普
