木荷次生林闽楠导入初期生长影响因素研究  被引量:3

Effects of Schima superba secondary forest’s gap area and strong tree’s pressure on ground diameter of Phoebe bournei introduced at early growth

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作  者:曾思齐[1] 黄炎俊[1] 肖化顺[1] 张敏[1] 甘静静[1] 彭其龙[1] 

机构地区:[1]中南林业科技大学,湖南长沙410004

出  处:《中南林业科技大学学报》2013年第8期1-5,共5页Journal of Central South University of Forestry & Technology

基  金:国家林业局林业公益性行业项目"南方集体林区次生林抚育间伐与高效利用技术研究"(201004032)

摘  要:通过在木荷次生林中导入闽楠后,研究其导入所在地的林窗面积及影响圈内所有影响木对其的压迫力与其地径初期生长情况的关系,发现在木荷次生林中导入闽楠,其初期生长受到所在林窗面积的影响较为显著,在林窗面积较小时,随着林窗面积的增大,导入楠木初期的生长越好,当林窗面积超过一个极值点后,则随着林窗面积的增加,导入楠木的初期生长开始下降,甚至出现死亡;当林窗面积相同时,其影响圈内的压迫力也会对其初期生长有一定的影响,当林窗面积较小时,导入苗木的生长随着其所受压迫力的增大而减小,且随着林窗面积的增大,其相关性逐渐降低,当林窗面积大于临界值时,导入苗木的生长受其所受压迫力的影响则不显著。By introducing Phoebe bournei into Schima superba secondary forest gap, the relationships among the introducted P. bournei and S. superba secondary forest gap area and the oppressive force that the strong tree in the gap added to the ground diameter at early growth of P bournei were investigated. It was found that the initial growth of introducted P bournei was significantly affected by the S. superba secondary forest gap area; if the forest gap area was smaller, the initial growth of introducted tree grew better and faster as the forest gap area increased, while when the gap size surpassed an extreme point, the initial growth ofP. bournei decreased as the forest gap area arose, even death occurred; when with the same gap size, the pressure within the forest gap influence circle also had certain effects on S. superba initial growth; when the gap size was smaller, with the increase of the pressure introduced, R bournei seedling growth decreased, and with the increase of the gap size, the correlation between them was gradually reduced; when the gap size was more than the critical value, the effect of the pressure on the introduced seedlings' growth was not significant.

关 键 词:木荷次生林 地径初期生长 闽楠 导入 影响木 压迫力 

分 类 号:S718.541[农业科学—林学] S756.4

 

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