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首页> 外文期刊>Journal of Tropical Forest Science >EARLY GROWTH IN VOLUME AND HEIGHT OF BOMBACOPSIS QUINATUM IN COSTA RICA PLANTATIONS
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EARLY GROWTH IN VOLUME AND HEIGHT OF BOMBACOPSIS QUINATUM IN COSTA RICA PLANTATIONS

机译：哥斯达黎加人工林白蚁数量和高度的早期生长

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摘要

Five pochote (Bombacopsis quinatum) plantations were sampled in Costa Rica using stem analysis methods to determine annual volume increment and patterns of height growth. Based on regressions relating cumulative stem volume to current diameter and age, and utilising the diameter tally of trees on plots, the cumulative total stem volume (inside bark) per hectare for stems on plots at time of sampling was determined for each site Estimates of total stem volume ranged up to 110 m~3 ha~(-1) in nine years. A 28-year-old stand with considerably fewer trees per hectare due to mortality of alternate rows of plantain and limited harvesting has a total stem volume of 170 m~3 ha~(-1). Tree volume equations are presented. Regressions were also derived to relatecumulative volumes in previous years to diameter of trees in the respective year. Methods are discussed for developing this relationship.
机译：使用茎分析方法在哥斯达黎加取样了五种po鱼（Bombacopsis quinatum）人工林，以确定年体积增加量和高度增长方式。基于将累积茎体积与当前直径和年龄相关联的回归，并利用地块上树木的直径理据，确定每个地点采样时地上茎的每公顷累积总茎体积（树皮内），确定每个地点在九年内，茎的体积达到110 m〜3 ha〜（-1）。一个28岁的林分，由于交替的车前草排的死亡率和有限的收获而导致每公顷树木少得多，其总茎体积为170 m〜3 ha〜（-1）。提出了树木体积方程。回归还得出了前几年的累积量与相应年份的树木直径的关系。讨论了建立这种关系的方法。

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