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对 5 5年生尾叶桉实生林砍伐后 ,保留不同萌条数量对其萌芽林生长和产量的影响开展了研究。结果表明 ,定株使桩的存活率明显下降 ,特别是保留单株 ,但保留一定的株数却有利于萌芽林的生长 ;萌芽林的高、径和单株材积生长随保留株数的减少而显著增加 ;3 5年生单位面积蓄积量和出材率 (顶木 )以保留 3株·桩- 1为最好 ,其次为 4株·桩- 1和 2株·桩 - 1,蓄积量分别为 4 5 4 9、4 4 2 1和4 2 5 1m3·hm- 2 ,分别是对照的 131 7%、12 8 0 %和 12 3.0 % ,出材率 (顶木 )分别是对照的 174 .3%、14 8.6 %和 15 5 .4 %。因此 ,在中等地力 ,种植密度为 3m× 2m的尾叶桉萌芽林 ,以纸浆材和顶木为主要经营目的的林分 ,建议其萌芽林的保留株数为 2 4株·桩 - 1。
Effects of different numbers of sprouts on the growth and yield of sprouted forest were studied after deforestation of 55-year-old Eucalyptus urophylla. The results showed that the survival rate of the pile decreased obviously with the fixed strain, especially keeping the single plant, but keeping a certain number of the plants was beneficial to the growth of the sprout plantation. The height, diameter and single plant volume growth of the sprout plant were significantly decreased with the decrease of the retained plant number , And the stocking rate and yield rate (top wood) of 3 5-year-old unit area were the best, followed by 4 plants, 1 pile, 1 plant and 2 plants and 1 pile, respectively 5 4 9,4 4 2 1 and 4 2 5 1m3 · hm-2 respectively, which were 131 7%, 12 0% and 12 3.0% of the control respectively. The yield rates (top wood) were 174.3% , 14 8.6% and 15 5 .4%. Therefore, in middle fertility, the planting density of 3m × 2m Eucalyptus eucalyptus sprouting forest, pulp and timber as the main business purposes of the stand, it is recommended that the number of reserved sprouting trees 24 strains · Pile -1.