冀北山地坡位条件对油松生长的影响
收稿日期: 2019-01-15
修回日期: 2019-04-12
网络出版日期: 2020-10-20
基金资助
国家重点研发计划子课题“油松速生建筑材林高效目标树管理技术研究”(2017YFD0600500)
Effects of Slopes on Chinese Pine Growth in Mountain Areas of Northern Hebei
Received date: 2019-01-15
Revised date: 2019-04-12
Online published: 2020-10-20
为了了解冀北山地坡位条件对油松生长的影响,对分布于坡面和坡顶的油松优势木的生长状况进行了比较分析。研究结果表明:坡面上油松的树高连年生长量、平均生长量和总生长量都明显高于坡顶,二者树高年平均生长量相差约9cm,但是地形对油松胸径生长没有明显影响;两种地形条件下,树高连年生长量随年龄的增长相对稳定,而胸径连年生长量都是在10年之前呈增加的趋势,而后下降,在20年生左右降至最低。两种地形条件下,油松树高和胸径的连年生长量的年际变化都具有明显的同步性,表明树高和胸径的生长都对年际的气候变化反应敏感;油松的树高年生长量与前1年的胸径生长量具有更高的相关性,表明前1年气候条件对油松的树高年生长有明显影响。油松高生长主要受地形和气候的影响,径生长则受林分因子和气候的影响;坡面地形更适宜于油松的生长,分布于坡面的油松林可用于培育优质木材,而分布于坡顶的油松林则宜作为生态林来进行保护和经营。
李校 , 姜玲玲 , 许中旗 , 贾彦龙 , 马荣 . 冀北山地坡位条件对油松生长的影响[J]. 林草资源研究, 2019 , 0(4) : 24 -30 . DOI: 10.13466/j.cnki.lyzygl.2019.04.004
In order to understand the influence of slope position on the growth of Chinese pine(Pinus tabuliformis),the Chinese pine forests located in the slope and slope top were investigated,in the northern mountain area of Hebei province.The results showed that the annual growth,average growth and total growth of Chinese pine on the slope were significantly higher than that on the slope top,and the difference between them was about 9cm for average growth,but the topography had no significant effect on the growth of DBH.Under the two topographic conditions,the annual growth of tree height was relatively stable with the increase of age,while the annual growth of DBH increased ten years ago,then decreased,and dropped to the lowest around 20 years.The interannual variability for growth of height and DBH of Chinese pine showed obvious synchronicity under two topographic conditions,indicating that the growth of height and DBH of Chinese pine was sensitive to interannual climate change.There was a higher correlation between the annual height growth of Chinese pine and the DBH growth of the previous year,indicating that the climatic conditions of the previous year had a significant influence on the annual height growth of Chinese pine.The height growth of Chinese pine was mainly affected by topography and climate,while the DBH growth was affected by stand factor and climate.The slope topography is more suitable for the growth of Chinese pine,and Chinese pine forest located on the slope can be used to cultivate high-quality wood,and Chinese pine forests distributed on the top of the slope should be used as ecological forests for protection and management.
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