Intra-and inter-clonal tree growth variations of Hevea brasiliensis  

作　　者：H.R.Naji M.H.Sahri 

机构地区：[1]Department of Forest Production,Faculty of Forestry,Universiti Putra Malaysia,Selangor,43400,Malaysia [2]Department of Forestry,Faculty of Agriculture,Ilam University,Ilam,69315-516,Iran

出　　处：《Journal of Forestry Research》2012年第3期429-434,共6页林业研究（英文版）

摘　　要：We evaluated the effects of planting densities （500, 1,000, 1,500 and 2,000 trees.ha-1） on tree growth performance （diameter at base, diameter at breast height, and clear bole height） of two clones （RRIM 2020 and PRIM 2025） of nine years old plantations of rubber tree （Hevea brasiliensis Muell. Arg） in Malaysia. For the four planting densities of the two clones, basal area and diameter at breast height declined with increasing planting density. Clear bole heights were greatest at 1,500 trees.haland lowest at 500 trees.ha-1 for the clone RRIM 2020, and at 2,000 trees.ha-1and 500 trees.halfor clone RRIM 2025. We conclude that the ideal planting density is 2,000 trees.ha＂l for obtaining high volume of wood production and 500 trees-ha-1 for high wood quality.We evaluated the effects of planting densities （500, 1,000, 1,500 and 2,000 trees.ha-1） on tree growth performance （diameter at base, diameter at breast height, and clear bole height） of two clones （RRIM 2020 and PRIM 2025） of nine years old plantations of rubber tree （Hevea brasiliensis Muell. Arg） in Malaysia. For the four planting densities of the two clones, basal area and diameter at breast height declined with increasing planting density. Clear bole heights were greatest at 1,500 trees.haland lowest at 500 trees.ha-1 for the clone RRIM 2020, and at 2,000 trees.ha-1and 500 trees.halfor clone RRIM 2025. We conclude that the ideal planting density is 2,000 trees.ha＂l for obtaining high volume of wood production and 500 trees-ha-1 for high wood quality.

关 键 词：CLONE planting density tree growth Hevea brasiliensis 

分 类 号：S794.1[农业科学—林木遗传育种] S718.43[农业科学—林学]