不同海拔高度对四川桤木生长的影响  

Effects of Different Altitude on Growth of Alnus japonica

作　　者：刘年元 杜斌 钟少伟 张鹏 LIU Nianyuan;DU Bin;ZHONG Shaowei;ZHANG Peng(Forest Bureau of Xiangxi Autonomous Prefecture,Jishou 416000,Hunan,China;Forestry Workstation of Runya Township,Yongshun County,Yongshun 416700,Hunan,China;Longshan County Forestry Bureau,Longshan 416800,Hunan,China)

机构地区：[1]湘西自治州林业局,湖南吉首416000 [2]永顺县润雅乡林业工作站,湖南永顺416700 [3]龙山县林业局,湖南龙山416800

出　　处：《中南林业调查规划》2021年第2期55-58,共4页Central South Forest Inventory and Planning

摘　　要：以三个不同海拔区域11年生的四川桤木林为研究对象,对其成活率和保存率、平均树高和平均胸径生长量、林分土壤化学性质进行分析。结果表明:不同海拔高度,四川桤木成活率和保存率均存在显著差异,但两者规律一致,在海拔440~480 m时保存率和存活率最高,分别能达到92.28%和89.38%,平均树高和胸径生长量差异特点也基本一致;海拔在440~480 m时,平均树高最高,为18.46 m,平均胸径也最大,为15.86 cm;四川桤木种植11年后,三个海拔区间的林地土壤化学性质均得到不同程度的提高,在海拔680~730 m时林分生长与林地地力恢复达到平衡状态。The 11-year-old Alnus ledgeriana forests at three different altitudes were used as objects of study to analyze their survival and retention rates,average tree height and DBH growth,and soil chemical property of stand.The results showed that the survival and retention rates of Alnus japonica were significantly different at different altitudes,but the survival rate was consistent with the retention rate,when in altitude 440~480 m,their retention and survival rates highest,up to 92.28%and 89.38%respectively,also basically the same in terms of differences in characteristics of average tree height and DBH growth;when in altitude 440~480 m,the average tree height highest,18.46 m,and the average DBH largest as well,15.86 cm;eleven years later after planting Alnus japonica,the soil chemical property of forestland for the three altitudes were improved in different degrees and in altitude 680~730 m,stand growth and forest land fertility restoration reached a balance state.

关 键 词：桤木 海拔 成活率 保存率 土壤 性质 

分 类 号：S792.14[农业科学—林木遗传育种]