论文部分内容阅读
于１９８８年和１９９３年，对金湖县池杉标准地进行重复调查，研究林分生长量的变化。结果表明：池杉在２２年生时材积生长尚未达数量成熟，材积年均生长量为１６．８ｍ３／ｈｍ２，比１７年生时增长６０％。
In 1988 and 1993, repeated surveys were conducted on the standard of Ipomoea fortunei in Jinhu County to study the changes of stand growth. The results showed that the volumetric growth of Ipomoea japonicus at the age of 22 years was not yet mature in volume. The average annual volume of biomass was 16.8m3 / hm2, an increase of 60% over 17 years.