我们的网站为什么显示成这样?

可能因为您的浏览器不支持样式,您可以更新您的浏览器到最新版本,以获取对此功能的支持,访问下面的网站,获取关于浏览器的信息:

|Table of Contents|

遮荫和土壤水分对毛红椿幼苗光合特性的影响(PDF)

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

Issue:
2006年05期
Page:
63-66
Column:
研究论文
publishdate:
2006-05-20

Article Info:/Info

Title:
The Effects of Shading and Soil Water Content on Photosynthesis of Toona ciliata var. pubescens Seedlings
Article ID:
1000-2006(2006)05-0063-04
Author(s):
ZHANG Lu1 GUO Lian-hua12 DU Tian-zhen1 HU Song-zhu1 YUAN Sheng gui1
1. College of I.andscape Architecture and Art Jiangxi Agricultural University, Nanchang 330045, China; 2. School of Forestry and Bio technology Zhejiang Forestry College, 1.in’an, 311300. China
Keywords:
Shading Soil water content Photosynthesis Toona ciliata var. pubescens
Classification number :
S718
DOI:
10.3969/j.jssn.1000-2006.2006.05.015
Document Code:
A
Abstract:
Net photosynthetic rate (Pn), stomatal conductance (Co), internal CO2 concentra tion (Ci), chlorophyll content and leaf area were measured in leaves of Toona ciliata var. pubescens seedlings grown in pots with various shading and various soil water contents. The resuhs showed as follows: The diurnal variations of Pn were "twin-peaked" curve, and the peak value occurred at 10:00 and 16:00 or so. There was an obvious "midday depression" phenoraenon under full light and middle shading (60%), while it didn’t occur obviously under strong shading (80%). The diurnal variations of Ci were just opposite to Pn under the full light. Photosynthesis was the strongest when water content in soil was sufficient. The decreasing of Cond and even variation of Ci showed that the decreasing of Pn was related to non stomatal restriction factors after 10:00. With the increase of leaf area and chlorophyll content under shading, the leaves of T. ciliata var. pubescens had the higher utilization effi ciency on weak light. The results suggested that the control of soil water content and irradiance might help to promote the growth of T. ciliata vat. pubescens.

References

-

Last Update: 2013-05-20