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中文摘要：
施用两种不同形态的氮素以研究其对高寒草甸天然草场生物量的影响,结果表明,以NH4＋-N作为单一施用氮源的处理,地上生物量鲜重达6 080kg/hm^2,地上生物量干重达2 716kg/hm^2,地下生物量干重达84 312.23kg/hm^2,比单一施用NO3-N的处理分别增产147.15%,115.56%和52.87%。在施用氮素总量中NH4＋-N比例的减少和NO3-N比例的增加的情况下,高寒草甸草场地上生物量和地下生物量变化呈下降趋势,提示施用无机氮肥不同形态牧草增产表现以铵态氮最佳,硝态氮最差。
英文摘要：
Applying two kinds of different type Nitrogen on Alpine meadow pasture for studying its effect on biomass.The results showed that aboveground biomass fresh weight reach 6 080kg/hm^2,aboveground biomass dry weight reach 2 716kg/hm^2,underground biomass dry weight reach 84 312.23kg/hm^2 under NH＋4-N as single nitrogen resource.Comparing with NO-3-N treatment as single applying,increasing by 147.15%,115.56% and 52.87% respectively.Chang of aboveground biomass and underground biomass on Alpine meadow tend to decreasing under proportion of decreasing NH＋4-N and increasing NO-3-N.Applying Non-organic Nitrogen fertilizre,gaining yield of different type of forage showed that NH＋4-N is optimum and NO-3-N is least optimum.
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