废弃采石迹地自然恢复的刺槐对降水变化的响应

The Response of Robinia Pseudoacacia to Variance of Precipitation in Abandoned Quarry Under Natural Restoration Condition

为了探索废弃采石迹地自然恢复过程中水分环境的变化趋势，利用年轮分析法对幕府山纪念碑采石场的18个刺槐年轮样本进行分析，并在搜集了该地区实测水文资料的基础上，研究了废弃采石迹地中自然恢复的刺槐年轮对降水变化的响应。结果表明：在采石场停采10a后，刺槐开始定居，这说明采石迹地的水分环境已经能够满足刺槐生长；刺槐年轮对8月份的降雨响应程度最高，表明8月是采石迹地刺槐生长的高峰期；从1986-2007年的8月实测降水值与计算值的比较可以看出，刺槐年轮对降水的响应呈周期性变化趋势。

To research the variance trend of water environment in abandoned quarry in natural restoration process, 18 annual ring samples of Robinia pseudoacacia in Monument quarry of Mufu Mountain area were analyzed by dendrochronology method. Based on observed precipitation data, responses of Robinia pseudoacacia annual rings to observed precipitation were studied. The results showed that after ten years of the quarry abandonment, Robinia pseudoacacia began to settle down. In other words, available water in abandoned quarry can satisfy the growth of Robinia pseudoacacia ; annual rings of Robinia pseudoacacia respond to precipitation in August at the highest level, that is, annual rings of Robinia pseudoacacia grow most in this month; from comparison between observed and theoretical value of August precipitation years of 1986 to 2007, we conclude that there is a periodic trend on response of annual rings to August precipitation.