WANG Juan-ting,WANG Nai-jiang.Research on Seedling Growth Law of Quercus Liaotungensis Koidz[J].Northern Horticulture,2014,38(08):64-68.
辽东栎幼苗的生长规律研究
- Title:
- Research on Seedling Growth Law of Quercus Liaotungensis Koidz
- 文章编号:
- 1001-0009（2014）08-0064-05
- Keywords:
- Quercus liaotungensis Koidz; seedling stage; biological characteristics; biomass; growth law
- 分类号:
- S 889+.3
- 文献标志码:
- A
- 摘要:
- 以辽东栎天然次生林的辽东栎种子为研究对象，采用完全随机区组设计，进行容器育苗，研究了辽东栎幼苗生长阶段的生物学特性及生长规律，以期为黄土高原辽东栎天然次生林的天然更新机制提供科学依据。结果表明：辽东栎幼苗的出苗率呈倒“J”型曲线，即“快-慢”的增长趋势，4月28日至6月28日是辽东栎幼苗出苗的主要时期；在辽东栎幼苗高生长过程中，播种后40~80 d（5月18日至6月28日）高生长最快（2.57 cm），在此期间幼苗苗高生长量分别为年苗高生长总量的24.83%和19.18%，表明在黄土高原地区春末夏初（5月18日至6月28日）为辽东栎幼苗全年中地上部高生长的最快时期，其高生长总体上符合“S”型生长发育规律；辽东栎幼苗的地上生物量、地下生物量和总生物量的生长基本一致，均符合“慢-快-慢”的生长规律，呈“S”型曲线增长；根冠比播种后20 d最大，为1.93±0.16，之后减小，播种后120~180 d，基本稳定，在此期间的根冠比分别为1.28±0.21、1.30±0.25、1.33±0.20、1.33±0.18。辽东栎幼苗生物量在不同部位的分配比例为地下根部分＞地上茎叶部分。
- Abstract:
- Taking seeds of Quercus liaotungensis Koidz of natural secondary forest as research objects，using completely randomized block design method of container seedling，the biological characteristics and growth laws of Quercus liaotungensis Koidz at seedling growth stage were studied,in order to provide the basis for natural regeneration of Quercus liaotungensis Koidz on the Loess Plateau.The results showed that the growth pattern of Quercus liaotungensis Koidz seedling emergence rate was resupinate ‘J’ type curve，namely ‘fast-slow’ growth trend，April 28th to June 28th was the main period of Quercus liaotungensis Koidz seedling emergence.In the growth process of Quercus liaotungensis Koidz seedling，40~80 days after sowing (May 18th~June 28th) the fastest growth period (2.57 cm)，seedlings of high growth rate was respectively 24.83% and 19.18% of the total annual seedling growth during this period，which suggested that late spring to early summer (May 18th~June 28th) to Quercus liaotungensis Koidz seedling high aboveground growth was the fastest period of annual seedling growth on the Loess Plateau，the high growth law of Quercus liaotungensis Koidz seedling generally conformed to the growth and development law of model ‘S’.The growth law on aboveground biomass，underground biomass and total biomass of Quercus liaotungensisKoidz seedlings conformed to ‘slow-fast-slow’，which was ‘S’ type curve.Root-shoot ratio got the biggest level when 20 days after sowing 1.93±0.16，then decreased，and basically stable when 120~180 days after sowing，the root-shoot ratios were respectively 1.28±0.21,1.30±0.25,1.33±0.20,1.33±0.18 during this period.The distribution ratio of underground biomass on Quercus liaotungensis Koidz seedling was higher than aboveground.
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备注/Memo
第一作者简介：王娟婷（1987-），女，陕西西安人，硕士研究生，现主要从事干旱区森林培育的理论和技术等研究工作。E-mail：Wang_Juan_ting@126.com.