青藏高寒牧区多年生人工草地持续利用的研究

The study on sustainable using of perennial sowing grassland in the Qinghai-Tibet Plateau pasture

通过多年研究,找出了困扰高寒牧区多年生人工草地建设的"建植3～5年后急速退化问题"的原因主要是毒杂草侵入和草地土壤有效养分匮缺;通过连续13年的示范试验,证明采取适当的管理措施可以有效的逆转草地退化趋势,实现草地多年持续利用。

After many years' research work, we have found the two causes that are main factors of grassland degradation rapidly, in a stage of 3~5 years after sowing. The first cause is that forb weeds invaded grassland, and the second is that the soil waned nutrient supply. By a series of experiments and demonstrations in recent 13 years, we have got a conclusion that we can turn the trend of grassland degradation by integrated management. Sowing grassland can be used for many years.