苏北海堤基干林带刺槐林生长及种群竞争特征研究  

Growth and Competition Characteristics of Robinia pseudoacacia Forest in the Coastal Trunk Shelterbelt of Northern Jiangsu Province

作　　者：芮雯奕[1] 李淑琴[1] 卢义山[1] 张纪林[1] 徐亚明 周俊龙 任吉星 周凤明 

机构地区：[1]江苏省林业科学研究院,江苏南京211153 [2]江苏省东台市林场,江苏盐城224242

出　　处：《西北林学院学报》2011年第2期26-30,共5页Journal of Northwest Forestry University

基　　金：国家"十一五"科技支撑计划项目专题(2006BAD03A1403)

摘　　要：研究沿海防护林种群生长竞争规律对营建高效沿海防护林具有重要意义。对苏北海堤不同栽植密度下12 a生刺槐人工林进行生长情况调查,研究种群生长的空间及竞争特征。结果表明,随着密度的增加,刺槐平均胸径(DBH)呈下降趋势,3 m×3 m密度下刺槐平均胸径为13.3cm,单株刺槐生长量最大,而1 m×1 m密度下单位面积刺槐生物量最高。高密度下种内竞争激烈,死亡率高。刺槐胸径的空间分布规律存在差异,随着栽植密度的增高,刺槐胸径的空间变异性增大。因此,营建刺槐防护纯林密度不宜过高,不同栽植密度下刺槐种群竞争规律及机制还有待进一步研究。Based on the observations on 12-year-old shelter forest of Robinia pseudoacacia with different densities,the charactertics of the growth spatial distribution and intraspecific competition were analyzed.The results showed that the average diameter at breast height（DBH） decreased when the density increased.The DBH was 13.3 cm with a density of 3 m×3 m.There was the highest biomass per tree in the density of 3 m×3 m,while the highest biomass per hectare was in the density of 1 m×1 m.Differences were also existed at the spatial distribution characteristics of DBH.The variation of DBH enhanced with the increased density.It also showed that the intraspecific competition was drastic at the higher density with a rather high death rate.It indicated that too much higher density was not suitable for the construction of shelter forest of R.pseudoacacia in the sea wall.In addition,the disciplinarian competition and its mechanism of R.pseudoacacia forest under different densities need to be studied.

关 键 词：刺槐 防护林 生长 空间分布 竞争 

分 类 号：S792.270.1[农业科学—林木遗传育种]