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借鉴树木年轮学的方法,运用LINTABTM6型树木年轮测定仪读取钻芯的年轮宽度,研究塔里木河下游的胡杨在生态输水前后主干径向生长量变化规律。结果表明:(1)输水前后胡杨主干径向生长量变化较明显。输水前(1990-1999年)径向生长量为1.078mm,而输水后(2000-2008年)是1.764mm,比输水前增加了0.686mm。(2)胡杨径向生长量对输水的响应具有滞后性,输水后3-4年胡杨生长量达到最高值。(3)距河道不同距离的胡杨主干径向生长量存在显著差异性,整体上随着离河道距离的增加,胡杨径向生长量呈现下降趋势。
Drawn from the tree-ring method, the annual ring width of core was read by LINTABTM6 tree-ring tester to study the rule of radial growth of Populus euphratica in the downstream of Tarim River before and after ecological water conveyance. The results showed that: (1) The main radial growth of Populus euphratica var. The radial growth before water conveyance (1990-1999) was 1.078 mm, while after water conveyance (2000-2008) it was 1.764 mm, an increase of 0.686 mm compared to that before water conveyance. (2) The response of Populus euphratica to the water transport has a lag, and the growth of Populus euphratica reaches the maximum after 3-4 years. (3) The radial growth of Populus euphratica at different distances from the river has significant difference. On the whole, the radial growth of Populus euphratica shows a downward trend with the increasing distance from the river.