【摘要】 为研究补播禾草对玛曲高寒沙化草地各经济类群地上生物量的影响,于2006年和2007年在甘肃玛曲高寒沙化草地进行了禾草补播试验。结果表明:补播禾草可增加高寒沙化草地草群高度和植被盖度。补播当年,莎草类地上生物量降低,禾草类地上生物量增加。补播第二年,各经济类群地上生物量都增加,禾草类的地上生物量增加最多,占到总生物量的50%左右。其中,中华羊茅(Festuca sinensis)、草地早熟禾(Poa pratensis)和垂穗披碱草(Elymus natans)混播的处理,禾草类和豆科类比对照分别高出34.56%和96.37%,是玛曲高寒沙化草地较好补播处理。补播作为改良天然草场的有效措施,对增加草群高度、覆盖度和提高草地地上生物量具有积极作用。更多还原

【Abstract】 The effects of overseeding on aboveground biomass of different economic group in Maqu alpine desertified meadow were studied from 2006 to 2007.The results showed that overseeding grass can increase vegetation height and coverage.Aboveground biomass of sedges decreased and grasses biomass increased in 2006.In 2007 aboveground biomass of all economic groups increased and grasses biomass increased significantly,which accounted for about 50% of the total aboveground biomass.Grasses and legumes in mixed sowing grassland of Festuca sinensis,Poa pratensis and Elymus natans(ZCP) were higher by 34.56% and 96.37% than control respectively,which was a better overseeding treatment for Maqu alpine desertified grassland.It showed that overseeding was the effective management measure for alpine desertified meadow,which had positive effect on increasing vegetation height,coverage and aboveground biomass.更多还原