银鹊树幼苗年生长节律研究

[目的]研究银鹊树幼苗年生长节律,为育苗管理提供参考依据。[方法]在贵州省林业科学院林业生态园苗圃选取3个小班样方,每个样方选择30株长势相当的银鹊树幼苗并进行编号,定时测量苗高、地径并统一进行水肥管理,观察记录银鹊树1年生幼苗苗高、地径在1年中季节生长规律。[结果]通过统计分析得到苗高和地径增长均呈"S"型增长模式,苗木增长出现缓慢期、速生期和停滞期3个时期。苗高速生期起点为6月中旬,持续至9月初,在8月初出现苗高速生点;地径速生期起点为7月中旬,持续至10月下旬,在8月初出现地径速生点。[结论]银鹊树1年生幼苗苗高和地径生长状况统计结果符合拟合Logistic方程的生长规律,其结果可为银鹊树栽培和可持续利用植物资源提供参考。

Research on the Growth Rhythm of Silver Magpie Sapling

[Objective] The growth rhythm of silver magpie sapling was researched for the management of reference for the nursery.[Method] In Ecological Garden Nursery of Guizhou Academy of Forestry Sciences,30 labeled silver magpie saplings in each side(total 3 small classes-like side) were selected as tested material for the periodical measurement of their plant height,subterranean stem diameter based on the a unified management of watering and fertilization and the growth rhythm(plant height and stem diameter) of 1-year-old silver magpie sapling was recorded for one year in their growth season.[Result] Through statistical analysis of plant height and subterranean stem diameter growth,both "S"-type pattern of growth was showed and the growth of silver magpie in the nursery was slow,fast and stagnation period,respectively.The fast growth period of plant height started from the middle July,lasted to the beginning of Sept.and the maximum growth point was in the beginning of August.The fast growth period of subterranean stem diameter started from the middle July,lasted to the late Oct.and the maximum growth point was in the beginning of August.[Conclusion] The plant height and subterranean stem diameter of 1-year-old silver magpie sapling was matched with Logistic equation and the results could be provided as the reference for the silver magpie tree cultivation and sustainable use of plant resources.