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轮叶黑藻对不同底质和密度的可塑性响应(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2008年04期
Page:
76-80
Column:
研究论文
publishdate:
2008-07-20

Article Info:/Info

Title:
The growth response of Hydrilla verticillata to sediment type and density
Article ID:
1000-2006(2008)04-0076-05
Author(s):
JIANG Jin-hui12 ZHOU Chang-fang12 AN Shu-qing12* GUAN Bao-hua2 CAI Ying2
1. State Key Laboratory of Pollution Control and Resource Uses, Nanjing University, Nanjing 210093, China; 2. Institute of Wetland Ecology Nanjing University, Nanjing 210093, China
Keywords:
Hydrilla verticillata Allometry Sediment type Density Plasticity
Classification number :
Q948
DOI:
10.3969/j.jssn.1000-2006.2008.04.017
Document Code:
A
Abstract:
In order to understand the plasticity of submerged macrophytes to environmental variations, an experiment on the g~owth response of Hydrilla verticillata to two sediment types (sand, clay+sand) and three densities was made. The results showed that compared with to sand sediment, (clay+sand) sediment greatly increased the plant height and stem diameter and decreased the root biomass allocation (P<0. 05). Lower density significantly increased the stem biomass allocation while decreased the leaf biomass ratio (P<0.05).’ For sand, plants at high density grew better, e. g., a great increase in relative growth rate and biomass (P<0.05). However, for clay+sand, density had an opposite influencing pattern, i. e., plants at high density had a slower growth (P<0.05). At high density, sand increased plant growth (P<0.05). At lower density, plants at (clay+sand) sediment grew faster (P

References

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Last Update: 2013-05-20