[1]陈科皓,王进鑫*,李继文. 不同生长期旱后复水对侧柏幼苗生物量的影响[J].西北林学院学报,2015,30(02):38-43.[doi:doi:10.3969/j.issn.1001-7461.2015.02.07]
　CHEN Ke-hao,WANG Jin-xin*,LI Ji-wen. Effect of Re-watering after Drought on Biomass of Platycladus orientalis Seedlings in Different Growth Stages[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2015,30(02):38-43.[doi:doi:10.3969/j.issn.1001-7461.2015.02.07]
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 不同生长期旱后复水对侧柏幼苗生物量的影响()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第30卷
期数:
2015年02期
页码:
38-43
栏目:
出版日期:
2015-03-30

文章信息/Info

Title:
 Effect of Re-watering after Drought on Biomass of Platycladus orientalis Seedlings in Different Growth Stages
文章编号:
1001-7461(2015)02-0038-06
作者:
 陈科皓1; 王进鑫2*; 李继文2
 （1.西北农林科技大学 水土保持研究所，陕西 杨陵 712100；2.西北农林科技大学 资源环境学院，陕西 杨陵 712100）
Author(s):
 CHEN Ke-hao1;  WANG Jin-xin2*;  LI Ji-wen2
 (1. Institute of Soil and Water Conservation, Yangling, Shaanxi 712100, China；2. College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China)
关键词:
 ; 侧柏; 干旱; 复水; 生物量; 根冠比
Keywords:
Platycladus orientalis;  drought;  rewatering;  biomass;  root-shoot ratio
分类号:
S718.45
DOI:
doi:10.3969/j.issn.1001-7461.2015.02.07
文献标志码:
A
摘要:
 为探讨不同生长期旱后复水对侧柏（Platycladus orientalis）幼苗生长的补偿效应，采用盆栽控水方法研究了生长前期、生长中期和生长末期旱后复水对侧柏幼苗单株生物量、地下部分生物量和根冠比的影响。结果表明，在不同水分胁迫程度下，生长前期单株生物量、地下部分生物量和根冠比的变化在复水之后无明显规律。生长中期侧柏的单株生物量随胁迫程度增大呈下降趋势；地下部分生物量和根冠比随胁迫程度的增大呈上升趋势。在不同胁迫历时下，单株生物量在前期和中期出现了补偿效应，且在胁迫30 d和胁迫45 d之后，补偿效应最明显；地下部分生物量在生长前期复水之后出现了明显的补偿效应；根冠比在生长前期和中期复水之后随胁迫历时的增加呈下降趋势。生长末期未出现补偿效应。
Abstract:
 In order to discuss the compensatory effect of re-watering after drought on biomass of Platycladus orientalis in different growth stages, a pot experiment was conducted respectively in early growth stage, middle growth stage and last growth stage to study the effects of re-watering on individual biomass, underground biomass and root-shoot ratio in seedlings of P. orientalis. The results showed that at different levels of water stress, the changes of individual biomass, underground biomass and root-shoot ratio in early growth stage were irregular after re-watering. In middle growth stage the individual biomass decreased with the increase of water stress levels; the underground biomass and root-shoot ratio showed an upward trend with the increase of water stress levels. Under different stress durations, individual biomass had compensatory effects in the early and middle growth stages, and an obvious compensatory effect occurred after 30 d and 45 d; underground biomass in early growth stage had an obvious compensatory effect after re-watering; root-shoot ratio at early and middle growth stages presented a downward trend after re-watering with the increase of stress duration. The last growth stage did not have compensatory effect.

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备注/Memo

备注/Memo:
 收稿日期：2014-07-20修回日期：2014-08-31
基金项目：高等学校博士学科点专项科研基金资助课题（20110204110009）；国家自然科学基金项目（31170579）。
作者简介：陈科皓，男，硕士研究生，研究方向：生态环境工程。E-mail：chenkehao.2008@163.com
*通信作者：王进鑫，男，教授，博士生导师，研究方向：干旱区人工林生态系统水分运移调控和生态恢复理论。E-mail：jwang118@126.com
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