望天树人工林林木个体前期生长节律的研究

Study on Growth Rhythm of Parashorea chinensis Individuals in Man-made Forest

依据20年生望天树人工林林木的生长调查及平均木的树干解析材料,分析了其林木个体的胸径、树高和材积的生长过程和规律,结果表明:在其人工林中望天树林木的前期生长迅速,20年生时林木个体的带皮胸径、树高和带皮材积分别达到19.4 cm,19.8 m和0.298 m3。其相应的年均生长量分别达到0.97 cm、0.99 m和0.0149 m3;望天树林木个体的胸径、树高和材积生长在6年生前较为缓慢,至14年生左右达到高峰,此后呈下降的趋势。依此,建立了望天树人工林林木个体的胸径、树高、材积生长模型。

The process and law of DBH, height and volume growing of Parashorea chinensis individuals in 20 years old man-made forest were studied on the data of investigation and trunk analysis. The study results showed that the Parashorea chinensis individuals in man-made forest had fast growth speed in earlier stage, the DBH, height and volume reached 19.4 cm, 19.8 m and 0. 298 m^3 respectively, with the corresponding growth increment of 0.97 cm, 0.99 m and 0. 0149 m^3 respectively. It was found that the earlier 6 years was the stage with slow growth, the peak occurred in 14th year after planting, next showing the growth model of Parashorea chinensis was established. tendency of decline. Based on the study results, thegrowth model of Parashorea chinensis was established.