塞罕坝白扦云杉径向生长对升温突变的响应  

Response of Radial Growth to Abrupt Warming of Picea meyeri in Saihanba

作　　者：于贵朋 Yu Guipeng(Saihanba Mechanized Forest Farm,Chengde 068456,Hebei,China)

机构地区：[1]河北省塞罕坝机械林场,河北承德068456

出　　处：《绿色科技》2024年第17期88-94,共7页Journal of Green Science and Technology

摘　　要：为探究白扦云杉(Picea meyeri)径向生长对升温突变的响应,以塞罕坝地区的白扦云杉天然林为对象,基于白扦云杉胸高断面积增量(BAI),利用Mann-Kendall检验升温突变发生时间,利用相关干旱数据资料识别出干旱事件年份,分析升温突变后塞罕坝地区白扦云杉径向生长规律及其与月气候数据的相关关系,对比白扦云杉对极端干旱事件的生态弹性差异。研究表明:①塞罕坝地区年均温于1987年发生突变,升温突变后该区年均温呈显著增加趋势(0.24℃/10 a),显著高于升温突变前。②升温突变后,白扦云杉BAI呈下降趋势,但无显著关系。③升温突变后,白扦云杉受到一定程度的干旱胁迫,与1986年12月温度呈显著负相关关系。④升温突变后,塞罕坝地区发生3次干旱事件(2001-2002年中旱、2006-2010年及2015年重旱),白扦云杉对干旱事件的抵抗力无显著差异,但恢复力与恢复弹力均呈显著下降趋势。To explore the response of radial growth of Picea meyeri to a sudden temperature increase,this study focused on natural forests of Picea meyeri in the Saihanba region.Based on the Breast Height Area Increment(BAI)of Picea meyeri,the Mann-Kendall test was employed to determine the timing of the temperature increase.Additionally,the drought years were identified based on relevant drought data.The radial growth pattern of Picea meyeri after the temperature increase in Saihanba and their correlation with monthly climate data were analyzed.Furthermore,the ecological resilience of Picea meyeri to extreme drought events is compared.Research shows that:①The annual average temperature in Saihanba area experienced a warming abrupt change in 1987.After the abrupt change,the annual average temperature showed a significant increasing trend(0.24℃/10 a),significantly higher than that before.②After the abrupt change,the BAI of Picea meyeri showed a decreasing trend,but it was not significant relationship.③After the abrupt change,the Picea meyeri was exposed to drought stress to a certain extent,which was significantly negatively correlated with the temperature in December 1986.the radial growth of Picea meyeri was negatively correlated with the mean temperature.④After the abrupt temperature change,three drought events(2001-2002 mid-drought,2006-2010 severe drought and 2015 severe drought)occurred in Saihanba area.There was no significant difference in the resistance to the drought events,but the recovery and the resilience of Picea meyeri declined significantly.

关 键 词：径向生长 白扦云杉 升温突变 生态弹性 

分 类 号：S757[农业科学—森林经理学]