| 造林密度对米老排人工林初期生长的影响 |
| |
| 引用本文： | 张阳锋,尹光天,杨锦昌,李荣生,邹文涛,王旭.造林密度对米老排人工林初期生长的影响[J].林业科学研究,2018,31(4):83-89. |
| |
| 作者姓名： | 张阳锋 尹光天 杨锦昌 李荣生 邹文涛 王旭 |
| |
| 作者单位： | 中国林业科学研究院热带林业研究所;广东省林业调查规划院 |
| |
| 基金项目： | 林业行业专项（201204304）；广东省林业科技创新项目（2016KJCX004）资助 |
| |
| 摘 要： | 目的]探讨不同造林密度对米老排人工林生长的影响规律,为米老排人工林定向培育过程中的密度控制提供参考。方法]以广东省云浮市造林后6年生米老排人工林为研究对象,对不同造林密度(625、833、1 111、1 667、2 500株·hm~(-2))林分平均树高、优势木高、胸径、保留率和枝下高等生长指标进行连续4年调查。结果]表明:随着造林密度的增大,米老排林分平均胸径、胸径连年生长量、保留率、单株材积和材积连年生长量均显著减小,而枝下高、林分蓄积量和蓄积连年生长量显著增加。在一定密度范围内,造林密度对林分高生长的影响比较小。造林后第6年,密度1 667株·hm~(-2)林分的平均树高最大(11.4 m),优势木高以密度1 111株·hm~(-2)林分的最大(13.3m),树高连年生长量以密度625株·hm~(-2)林分的最大(1.5 m·a~(-1));密度625株·hm~(-2)林分的平均胸径、胸径连年生长量、单株材积和材积连年生长量均最大,分别为14.3 cm、2.5 cm·a~(-1)、0.097 3 m~3和0.038 2 m~3·a~(-1),比密度2 500株·hm~(-2)林分的分别增加27.7%、81.0%、49.0%和82.4%;密度2 500株·hm~(-2)林分的枝下高、蓄积量和蓄积连年生长量均最大,分别为6.0 m、149.4 m~3·hm~(-2)和44.8 m~3·hm~(-2)·a~(-1),分别是密度625株·hm~(-2)林分的2.61、2.52、1.95倍。结论]分析了造林密度对米老排初期生长的影响,对米老排人工林的培育具有理论指导意义。
|
| 关 键 词： | 造林密度 树高 胸径 枝下高 保留率 单株材积 林分蓄积量 |
| 收稿时间： | 2016/9/3 0:00:00 |
Effects of Planting Density on the Early Growth of Mytilaria laosensis Plantation |
| |
| ZHANG Yang-feng,YIN Guang-tian,YANG Jin-chang,LI Rong-sheng,ZOU Wen-tao and WANG Xu.Effects of Planting Density on the Early Growth of Mytilaria laosensis Plantation[J].Forest Research,2018,31(4):83-89. |
| |
| Authors: | ZHANG Yang-feng YIN Guang-tian YANG Jin-chang LI Rong-sheng ZOU Wen-tao and WANG Xu |
| |
| Institution: | Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, Guangdong, China;Guangdong Forestry Survey and Planning Institute, Guangzhou 510520, Guangdong, China,Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, Guangdong, China,Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, Guangdong, China,Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, Guangdong, China,Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, Guangdong, China and Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, Guangdong, China |
| |
| Abstract: | Objective] To investigate the influence of planting density on stand growth characteristics of Mytilaria laosensis and to provide guidance for the density management.Method] A 6-year-old M. laosensis plantation with different densities (2 500, 1 667, 1 111, 833 and 625 trees·hm-2) at Yunfu of Guangdong Province was used to investigate the average height, dominant height, diameter at breast height (DBH), survival rate and the height to the living branch (HLB) for 4 successive years.Result] The results showed that, as planting density increased, the DBH and current annual increment (CAI) of DBH, survival rate, individual tree volume and CAI of individual tree volume declined significantly, while the HLB, stand volume and CAI of stand volume increased significantly. In a certain range of densities, the planting densities had few effects on stand height growth. In the sixth year after planting, the maximum mean height (11.4 m) occurred at a stand of 1 667 trees·hm-2 and the maximum dominant height (13.3 m) was found in the 1 111 trees·hm-2 density; the maximum CAI of height was 1.5 m·a-1 which occurred at a stand of 625 trees·hm-2; the average DBH, CAI of DBH, individual tree volume and CAI of individual tree volume showed the highest at the stand density of 625 trees·hm-2, which were 14.3 cm, 2.5 cm·a-1, 0.097 3 m3 and 0.038 2 m3·a-1, respectively, increased by 27.7%,81.0%, 49.0% and 82.4% compared with the planting density of 2 500 trees·hm-2; the HLB, stand volume and CAI of stand volume were the highest at the stand density of 2 500 trees·hm-2,which were 6.0 m, 149.4 m3·hm-2 and 44.8 m3·hm-2·a-1, respectively, 2.61, 2.52 and 1.95 times that of 625 trees·hm-2 density.Conclusion] The results of studying the effect of planting density on the growth of M. laosensis can be used as reference for the cultivation of M. laosensis. |
| |
| Keywords: | planting density tree height diameter at breast height the height to the living branch survival rate individual tree volume stand volume |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《林业科学研究》浏览原始摘要信息 |
| 点击此处可从《林业科学研究》下载免费的PDF全文 |
|
