| 造林密度对白杨杂种无性系初期生长性状的影响 |
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| 引用本文： | 王利宝,张志毅,康向阳,宋连君,尚富华.造林密度对白杨杂种无性系初期生长性状的影响[J].北京林业大学学报,2012,34(5):25-30. |
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| 作者姓名： | 王利宝 张志毅 康向阳 宋连君 尚富华 |
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| 作者单位： | 北京林业大学林木育种国家工程实验室,林木花卉遗传育种教育部重点实验室 中南林业科技大学林学院;北京林业大学林木育种国家工程实验室,林木花卉遗传育种教育部重点实验室;河北威县毛白杨良种繁育基地 |
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| 基金项目： | “十一五”国家科技支撑计划项目(2006BAD24B04、2006BAD01A1502) |
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| 摘 要： | 在河北威县毛白杨繁育基地，采用完全随机区组试验研究不同造林密度（2 500、1 667、1 111、833、625、500、417株/hm2）对5年生毛白杨杂种无性系S86生长及产量性状的影响，探讨造林密度对生长性状的作用规律。结果表明:造林后4年，造林密度对林分胸径、立木单株材积的影响效用突显出来并达极显著水平，对树高生长的影响仅在造林当年显著，对蓄积量的影响在前5年内的各年均呈显著水平；造林密度与胸径、单株材积的生长存在极显著负相关关系，与蓄积量的生长呈极显著正相关，与树高生长呈显著负相关。造林密度对生长指标连年生长量的影响与造林密度和生长指标有关，一般造林密度超过1 111株/hm2时，连年生长量峰值出现较早，速生期持续期较短，低密度林分连年生长量峰值出现较晚；培育短周期S86无性系工业用材林，在造林后2～4年内是林分的快速生长期。
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| 关 键 词： | 白杨 杂种无性系 造林密度 生长性状 |
| 收稿时间： | 1900-01-01 |
Effects of planting density on the early growth traits of white poplar hybrid clones |
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| WANG Li-bao , ZHANG Zhi-yi, KANG Xiang-yang,SONG Lian-jun,SHANG Fu-hua.Effects of planting density on the early growth traits of white poplar hybrid clones[J].Journal of Beijing Forestry University,2012,34(5):25-30. |
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| Authors: | WANG Li-bao ZHANG Zhi-yi KANG Xiang-yang SONG Lian-jun SHANG Fu-hua |
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| Institution: | 1 National Engineering Laboratory for Tree Breeding of Ministry of Education, Key Laboratory for Genetics and Breeding in Forest Trees and Ornamental Plants, Beijing Forestry University, 100083, P. R. China; 2 College of Forestry, Central South University of Forestry and Technology, Changsha, 410004, P. R. China; 3 Improving Populus tomentosa Variety Nursery of Weixian County, Hebei,054000, P. R. China. |
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| Abstract: | To analyze the influence of planting density on growth properties of 5-year-old hybrid clones of Populus tomentosa,effects of seven planting densities( 2 500,1 667,1 111,833,625,500 and 417 trees / hm 2 ) on the growth and yield properties were studied by completely random block experiments located in Weixian County,Hebei Province of northern China. The results indicated that,the effects of planting density on the diameter at breast height( DBH) and individual stand volume were significant at 1% level 4 years later after planting,that on height growth was remarkable at 5% level only in the first year of afforesting,and that on stand volume per area was significant every year in first 5 years. Regression analysis showed that planting density significantly correlated with DBH,individual stand volume and tree height negatively,and significantly correlated with stand volume positively. The effect of density on current annual increment was related with density and growth properties. The planting density exceeding 1 111 trees / hm 2 could cause an early occurrence of maximum current annual increment and a short duration of rapid growth. Conversely,the low density could result in a late appearance of maximum current annual increment. According to the results, rapid growth period of short-rotation industrial plantation of clone S86 was first 2--4 years after planting. |
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| Keywords: | white poplar hybrid clone planting density growth property |
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