文档介绍：
低磷与邻株竞争协同胁迫对杉木幼苗生长
的影响#
1,2 1,2 1,2
1,2**
5
10
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30
35
(1. 福建农林大学林学院,福州 350002;
2. 国家林业局杉木工程技术研究中心,福州 350002)
摘要:选择目前南方林区广泛种植杉木无性系为研究对象,利用室内沙培模拟装置,分别在单株和双株种
植条件下设置 3 个供磷水平,构建低磷与邻株竞争协同胁迫环境。研究表明:低磷与邻株竞争协同胁迫可
明显促进杉木苗高生长,但缺磷抑制杉木苗高生长。供磷水平与栽植方式对杉木地径生长的影响均不显著,
但二者协同作用对杉木地径生长有一定影响。栽植方式对杉木幼苗根系生长影响效果显著,以邻株竞争与
低磷协同胁迫条件下杉木根系长度、表面积、直径、体积等形态指标增量最大。
关键词:杉木;低磷胁迫;栽植方式;根系生长
中图分类号:
Effect of low phosphorus petition couple stress on
growth of Chinese fir seedlings
LI Qi1,2, WU Pengfei1,2, CHEN Zhiyu1,2, ZOU Xianhua1,2
(1. Forestry College, Fujian Agriculture and Forestry University, Fuzhou, Fujian China 350002;
2. State Forestry Administation Engineering Research Center of Chinese Fir, Fuzhou, Fujian
China 350002)
Abstract: Objected with the widely planted in South China recently, using the sand-culture indoor
simulation pots supplying with three different P levels, and planting single seedling and double ones
separately, a couple stress environment with low P and petition was constructed. Main results
were as follows. The couple stress could obviously promote the height growth of seedlings of Chinese
fir, but P deficiency inhibited the growth. Effects of supplying P levels and planting patterns on ground
diameter growth of Chinese fir were not significant, but the synergistic effect on the ground diameter
growth had a certain influence. There