湿地松纸浆原料林密度控制与管理技术研究  

Density Control of Slash-pine Pulpwood Forest and Its Management

作　　者：童方平[1] 徐艳平[1] 龙应忠[1] 宋庆安[1] 易霭琴[1] 

机构地区：[1]湖南省林业科学院,湖南长沙410004

出　　处：《中南林业科技大学学报》2009年第3期45-48,共4页Journal of Central South University of Forestry & Technology

基　　金：湖南省自然科学基金项目(05JJ3072)

摘　　要：为探索湿地松优质高产纸浆原料林密度控制与管理技术，进行了不同初植密度造林与间伐试验，试验结果表明：8a生、12a生密度试验林不同密度林分胸径、树高、蓄积量和总产量有极显著差异，8a生密度试验林不同密度林分木材性有极显著差异．林分在8a生时，平均树高生长效应是林分越密树高越高，林分平均胸径生长效应是林分密度越小胸径越大，蓄积量的生长效应是林分越密蓄积越大，木材材性是以中等林分密度质量最好．营造湿地松高产优质纸浆原料林适宜初植模式为2m×2m、2m×2．5m，即初植密度分别为2505株／hm2和1995株／hm2，此时2505株／hm。林分按下层间伐方式间伐25％、1995株／hm2林分按下层间伐方式间伐20％后4a（林分年龄为12a），这二种密度林分蓄积分别为224．08m3·hm^-2和206．64m3·hm^-2，蓄积加间伐材材积的总产量分别为244．56m3·hm^-2和218．72m3·hm^-2．为培育出质量和产量兼优的湿地松纸浆原料林，当林分生长到8a生时，应及时地进行一次抚育间伐，间伐强度为20％～25％．An experiment was conducted on different types of thinning and planting density to explore a density control over slash-pine pulpwood forest and its management technology. Results show that there are significant differences in breast-diameter, height, volume and total yield with 8-year-old and 12-year-old stands, and obvious differences in wood property with 8-year-old stands of different densities; and that the growth of height, breast-diameter, volume and wood property of 8-year-old corresponds to stand density： the more trees, the higher the height ; the less trees, the bigger the breast-diameter ; the more trees, the greater the volume, and the density of a medium size, the best the property. Results also show that the suitable initial planting space is 2 m×2 m and 2 m × 2. 5 m; so the planting density is 2 505 trees /hm2 and 1995 trees /hm2; and that after 4 years of thinning, when 2 505 treess/hm2 stand undergoes a reduction of 25% and 1995 trees/hm2 stand does 20%, the volume reaches 224. 08 m3·hm^-2 and 206. 64 m3·hm^-2 and the total yield including the thinning volume reaches 244.56 m3·hm^-2and 218.72 m3·hm^-2. In order to cultivate slash-pine pulpwood forest with good quality and high yield, 8-year-old stands should undergo a thinning of 20 to 25% reduction.

关 键 词：密度控制 间伐 纸浆材 湿地松 

分 类 号：S718.43[农业科学—林学]