阿坝州干旱河谷区自然植被及生长调查

2005年7月20日至10月15日,对阿坝州6个县干旱河谷地区的自然植被进行了调查。结果表明:干旱河谷区主要植物物种有26种,以小叶羊蹄甲分布范围最广,其次是野花椒、虎榛子、三颗针、白刺花。同一区域不同树种的生长状况差异显著,即使是相同树种,在不同地区的生长差异也很明显。综合各项生长指标,金川县虎榛子是干旱河谷区同类树种中生长状况最优的,其植株平均高度、平均冠幅占有相同树种不同地区的绝对优势。同样,茂县的小叶羊踢甲、黑水县的三颗针等也是干旱河谷区同类树种的最优树。

An Investgation on Natural Vegetations and their Growth in Drought River Valleys of Aba Prefecture

From July 20th to October 15th in 2005,a thorough investigation was made on natural vegetations in 6 counties of ABa.The conclusions are made as follows:(1)There are 26 main species of plants in total.Bauhinia abrachycarpa is mostly widely-distributed,and then is wild pepper,Ostryopsis davidiana,Bereris pruinosa Franch.and Sophora davidi;(2)The different plants show a different growth condition in the same area.Even if the same plant is in different areas,its growth condition has a remarkable discrepancy;(3)According to the total growth data,Ostryopsis davidiana in Jinchuan county is the best-growing plant of the same sort in the drought river valleys,and its average height,and crown diameter have a remarkable superiority.Bauhinia abrachycarpa in Mao County and Bereris pruinosa Franch.in Heishui County are also the best-growing plants in the drought river valleys.