摘要
2015年8月,选择浙江省建德市寿昌林场绿荷塘林区内"楠木"优势程度不同的天然林,对其林分群落结构特征和经营策略进行调查和分析。结果表明,天然"楠木"优势林中,乔木层的物种组成相对单一,"楠木"类树种径级呈正态分布,在乔木层占绝对优势,小径级的个体很少;割灌除草后,灌木层中"楠木"类的幼树稀少,但草本层中幼苗较多。根据近自然森林经营技术体系,该类林分以目标树经营代替普通的割灌除草,通过开辟林窗,既培育优良的大径材,也有利于天然更新,提高林分的生态功能。天然"楠木"伴生林中,"楠木"数量相对较少,径级分布呈现倒J型,缺少大径级个体,基本处于被压制状态;但是,在灌木层和草本层中,"楠木"类树种的重要值均为最大,说明该类林分中"楠木"具有较好的更新能力,可以通过实施目标树经营,加速"楠木"类树种进入乔木层,促进林下目的树种的生长。
Investigations were conducted on stand structure of natural forest with different dominance of Nanmu in Shouchang Forest Farm of Jiande, Zhejiang province on August 2015. Discussion was made on their strategy of management. The results showed that species composition at tree layer was relatively simple in the stand with dominance of Nanmu and the diameter class of Nanmu was normal distribution with absolutely dominant at tree layer but few small diameter individual. After swamping and weeding, saplings of Nanmu were fewer at shrub layer, but more seedlings in herb layer. According to close-to-nature forestry, the investigated stand needs to take crop tree release in place of common swamping. In the natural stand with Nanmu as associated tree, there was few number and large diameter class individuals. The diameter class distribution Nanmu presented the inverted J-shaped. However, the important values of Nanmu at shrub and herb layer were the biggest, indicating that Nanmu had good ability to natural regeneration. Suggestions were made on crop tree release of Nanmu in the stand.
出处
《浙江林业科技》
北大核心
2017年第2期24-29,共6页
Journal of Zhejiang Forestry Science and Technology
基金
浙江省省院合作林业科技项目"钱塘江中上游高效水源林构建关键技术研究与示范"(2014SY01)
全国森林经营科技支撑科研专项"多功能森林经营浙江省样板基地模式研究与示范"
"浙江省各省级定位站技术支撑及相关科学研究"
关键词
楠木
天然种群
群落结构
目标树经营
Nanmu
natural population
community structure
crop tree release
