渭北黄土高原油松人工林生长过程及其与立地和人为干扰的关系  

Growth Process of Individual Stems of Pinus Tablaeformis Plantations on Weibei Loess Plateau and its Relationship to Site Goodness and Interference

作　　者：彭鸿 Bernd Stimm 

机构地区：[1]陕西省水土保持局,陕西西安710004 [2]Chair of Sivilculture and Forest Management

出　　处：《陕西林业科技》2003年第1期1-6,26,共7页Shaanxi Forest Science and Technology

基　　金：德国 A ndreas- Stihl基金会项目

摘　　要：通过对渭北黄土高原油松人工林最大林木的树干解析和年轮分析 ,描述了林分两株最大林木的树高、直径和材积生长过程。结果表明 ,“好”立地条件下生长的油松林分最大林木高生长优于“差”立地条件下生长的林木 ,高生长达到峰值的年龄在“好”的立地条件下是 2 0～ 2 4年 ,在“差”的立地条件下是 8～ 16年。胸径在造林后 16年内生长迅速 ,随着人为干扰程度的不同波动较大。干扰强度大的林分其最大林木年轮宽度灵敏度指数高。年轮增长对生长间伐引起的空间改变反映敏感。最大林木的平均材积生长量至今均未达到最大。Growth process of height, diameter at breast height(dbh)and volume of the two largest stems of sampled Chinese pine stands on Weibei-loess plateau were described by analyzing stem disks and growth rings. It is concluded that height growth of stems on “good” site was better than on 'poor' one,height growth culminates at an age of 20～24 on “good” sites and of 8～16 year on “poor” ones. Within 16 years after planting dbh growth increased quite fast, and then decreased with different kinds of fluctuation depending on intensity of interference. Sensibility index of growth rings of the two largest stems tended to be larger with strong interference than that with light interference. Ring growth reacted extremely sensible against any change of stems' space resulting thinning. Mean total increments of volume of all sampled largest stems had not yet reached their culmination up to now.

关 键 词：人工林 生长过程 人为干扰 油松 渭北黄土高原 胸径 高生长 立地条件 材积 年轮结构 

分 类 号：S791.254[农业科学—林木遗传育种]