那曲中部区弃耕草地的生态恢复制约因素

为探寻弃耕草地的生态恢复制约因素,在那曲中部区选取面积200亩的弃耕退化天然草地,实施三年的生态恢复尝试,通过围封、种肥撒播等措施,观察弃耕草地生态恢复情况。结果表明:引进草种的抗逆性不高、播种方式影响种子萌发率、水土流失和生态意识欠缺导致的牛羊啃食是影响弃耕草地生态恢复的主要制约因素。

In order to explore the restrictive factors of ecological restoration of abandoned ploughed grassland, 200 mu abandoned cultivated degraded natural grassland was selected in the middle of Naqu, and the ecological restoration attempt was carried out for three years. The ecological restoration of abandoned grassland was observed by enclosure, planting fertilizer sowing and other measures. The results showed that the main restrictive factors affecting the ecological restoration of abandoned grassland were the low stress resistance of introduced grass species, the influence of sowing mode on seed germination rate, soil and water loss and the lack of ecological consciousness.