生态输水干扰下塔里木河下游幼龄胡杨胸径浅变化研究  

DBH Change of Juvenile Populus Euphratica in the Lower Reaches of Tarim River under Water Conveyances

作　　者：买古尔当·克依木 玉米提·哈力克 Florian Betz 阿布都米吉提·阿布力克木 艾力西尔·库尔班 

出　　处：《新疆大学学报（自然科学维文版）》2016年第1期39-46,共8页JOURNAL OF XINJIANG UNIVERSITY

摘　　要：本文以塔里木河下游10次应急输水的生态效益评估为研究目标，利用2005年和2010年的塔里木河下游阿拉干断面胡杨林生态调查数据，分析了离河道距离50m以内的345棵幼龄胡杨（DBH掣cm）的胸径生长量和株数在不同时间和空间尺度上的变化，探讨了幼龄胡杨的生长指标胸径对应急输水的生态响应。结果表明，2005年实测幼龄胡杨株数为345棵，到2010年，其中42．61％己超出幼龄胡杨范围、36．23％仍为幼龄胡杨、14．20％已消失、6．96％的幼龄胡杨已枯死。2005年的幼龄胡杨占总胡杨树的16．91％，2010年其总占比增加到31．17％。在时间尺度上，随着应急输水次数和累计输水量的增加，幼龄胡杨胸径生长量和株数显著增多。在空间尺度上，随着离河道距离的增加，幼龄胡杨的胸径生长量和株数呈现递减趋势，胸径生长量与离河道距离之间的对数相关性较高（R2=0．7863），幼龄胡杨株数和离河距离的多项式相关系数为0．7531。In order to assess the benefits of 10 times of emergency water transferring on floodplain forest ecosystems in the lower reaches of the Tarim River, the response of Diameter at Breast Height （DBH） of juvenile P.euphratica within the distance of 50 m from the river to water transportation project is analyzed base on the long term of field survey data obtained in the year 2005 and 2010 at Arghan section. The results show that the number of juvenile P.euphratica measured in 2005 was 345, 42.61% of them are already exceeded the scope of juvenile P.euphratica, 36.23% of them remained as juvenile P.euphratica, 14.20% of them lost, 6.96% of them dead in 2010. The proportion of juvenile P.euphratica in total P.euphratica increased from 16.91% in 2005 to 31.17 % in 2010. In the time scale, with increasing of the emergency water transfer times and the cumulative quantity of water, the DBH increment and the number of P.euphratica are correspondingly increased. In the spatial scale, with increasing distance from the river, their number and change of DBH growth displayed decreasing trend, the correlation coefficient R2 between change of DBH growth and distance from the fiver is 0.7863 within 50 m area, 0.7531 between the number of juvenile tree and the distance from the river in the same area.

关 键 词：塔里木河下游 应急输水 幼龄胡杨 胸径生长量 

分 类 号：S791.248[农业科学—林木遗传育种]