南方红豆杉修枝后生长与干形动态表现  

Growth and stem form quality with pruning in Taxus wallichiana var. mairei

作　　者：欧建德 吴志庄[2] 

机构地区：[1]福建省明溪县林业局,福建三明365200 [2]国家林业局竹子研究开发中心浙江省竹子高效加工重点实验室,浙江杭州310012

出　　处：《浙江农林大学学报》2017年第1期104-111,共8页Journal of Zhejiang A&F University

基　　金：中央财政林业科技推广示范资金项目(闽〔2015〕TG05号)

摘　　要：为高效培育优质南方红豆杉Taxus wallichiana var.mairei干材,提高修枝成效,以福建省明溪县11年生南方红豆杉人工林为研究对象,以未修枝的为对照,进行修枝强度分别为0.3,0.4,0.5相对高和对照的修枝度试验,系统分析了修枝对南方红豆杉生长及干形形质的影响,揭示其修枝后的变化规律,并优化修枝技术。结果表明:修枝后5 a不同修枝强度间的生长及干形形质存在差异,且随修枝后时间推移而发生变化。随修枝后时间推移,修枝后的南方红豆杉生长性状较对照的表现越来越明显,但不同修枝强度间的生长效应、动态变化规律、水平差异及出现显著差异的时间点不尽相同。修枝可明显地降低南方红豆杉的冠长率。随修枝后时间推移,与对照相比,修枝的胸高形数呈出先降后升的变化趋势。与对照比较,修枝0.3和4 a间隔期的修枝组合的胸径、树高、单株材积与胸高形数分别增加了4.25%,4.76%,15.94%,2.04%(P<0.05),冠长率降低了14.54%(P<0.05)。因此,南方红豆杉的优化修枝组合为0.3相对高的修枝强度、4 a间隔期。For obtaining efficiency of high quality cultivated timber and to measure pruning influences on growth and stem form quality of Taxus wallichiana var. mairei,a pruning intensity test was established in Mingxi County, Fujian, China. An unpruned plantation was used as a control （ck） with three pruning intensity treatments of 0.3-relatively high,0.4-relatively high,and 0.5-relatively high. The effect of annual dynamic change rules with the passage of time after pruning were revealed with an 11- year-old T. wallichiana var. mairei plantation, and then the pruning technology was optimized. Results showed that five years after pruning there were strong influences （P 〈0.05） on the growth and stem form traits with different pruning intensities; com-pared with the control, growth trait performance after pruning was more and more obvious over time. The func- tion, dynamic change law and time that significant differences appeared for growth traits changed with different pruning intensities （ P〈0.05）. Pruning reduced the crown length ratio of T. wallichiana var. mairei. After prun-ing and compared to the control, changes in breast height form factor for pruning appeared lower then higher over time.DBH （diameter at breast height）, tree height, volume, and breast height form factor of the 0.3-rela- tively high pruning intensity at a four year interval were significantly greater （P 〈0.05） than the control;whereas, the crown length ratio was significantly less （P〈0.05）. Thus, the optimal pruning combination for T. wallichiana var. mairei was 0.3, relatively high pruning intensity and a four-year interval period. [ Ch, 1 fig. 5 tab. 18 ref. ]

关 键 词：森林经营学 南方红豆杉 人工林 修枝 生长 形质 

分 类 号：S753.5[农业科学—森林经理学]