摘要
2013—2014年在广西林业科学研究院苗圃地内对黑荆树幼苗不同月份的苗高和地径生长量进行调查,分析其幼苗的生长节律,并利用Logistic曲线和S曲线拟合黑荆树0.5年生幼苗的生长过程。结果表明,黑荆树0.5年生幼苗的生长进程具有明显的间歇性,苗高和地径均有2次生长高峰,且出现时间基本一致。Logistic曲线更适合描述其苗高和地径的生长过程,拟合的生长曲线可预测黑荆树0.5年生幼苗的生长状况,从而为育苗造林工作提供参考。依据黑荆树0.5年生幼苗地上部分的生长特点,将其生长过程划分为生长前期、速生期和盛末期3个阶段,并根据不同阶段的生长特性提出相应的育苗措施。
Acacia mearnsii seedling at the nursery of Guangxi forestry research institute was selected as material to study the height and ground diameter growth of seedlings in different month, analyzed their growth rhythm, and then fit the growth process of semiannual seedling by using Logistic curve and S curve. The result showed that the growth process of semiannual seedling had obvious intermittently. There were two peaks of both height and basal di- ameter in semiannual seedling, and the time of occurrence was consistent. Logistic curve was more appropriate to describe the growth of height and basal diameter than S curve. The seedling growth could be well predicted by fit- ting curves, and then provided direct decisions for nursery seedling and forestation. According to above-ground part growth characteristics of the semiannual seedling, seedling growth could be dividing into three stages ： early growth period, fast growth period and later growth period. Therefore, different cultivate seedlings measures should be a- dopted according to the characteristics of different growth stages.
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2015年第1期17-20,共4页
Journal of Southwest Forestry University：Natural Sciences
基金
国家林业行业公益科研专项(201104019)资助
关键词
黑荆树
苗期
苗高
地径
生长节律
Acacia mearnsii
seedling period
height
ground diameter
growth rhythm
