论文部分内容阅读
青海杨(Populas przewalskiiMaxim)是青海高原荒漠半荒漠地区特有的杨树种群,主要分布于柴达木盆地、黄河中上游沿岸及青海湖的周边山地,海拔2800~3200m。由于自然和人为的破坏,天然林资源数量很少,2002年被列入青海省重点保护名名录第一批树种,并定为濒危植物。青海杨具有超?
Populas przewalskii Maxim is a poplar population endemic to the desert semi-desert region of Qinghai Plateau, and is mainly distributed in the surrounding mountains of the Qaidam Basin, the upper and middle reaches of the Yellow River and the surrounding Qinghai Lake at an elevation of 2800 ~ 3200m. Due to the natural and man-made damage, the natural forest resources are very few. In 2002, it was listed as the first batch of species in the list of key protected areas of Qinghai Province and designated as endangered plants. Qinghai Yang with ultra?