[1]段玉玺,贺康宁,朱艳艳,等.盐池沙地不同土壤水分条件下沙柳的光响应研究[J].水土保持研究,2008,15(03):200-203.
　DUAN Yu-xi,HE Kong-ning,ZHU Yan-yan,et al.Responses of Photosynthesis and Transpiration of Sand Willow to Light in Different Soil Moisture in Sandy Land of Yanchi Country[J].Research of Soil and Water Conservation,2008,15(03):200-203.
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盐池沙地不同土壤水分条件下沙柳的光响应研究

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 15 期数: 2008年03期 页码: 200-203 栏目: 出版日期: 2008-06-20
Title:
Responses of Photosynthesis and Transpiration of Sand Willow to Light in Different Soil Moisture in Sandy Land of Yanchi Country
作者:
段玉玺1,2, 贺康宁1, 朱艳艳1, 芦新建1, 张进虎1, 孙跃强1
1. 北京林业大学 水土保持学院 教育部水土保持与荒漠化防治重点实验室, 北京 100083;
2. 内蒙古林业科学研究院, 呼和浩特 010010
Author(s):
DUAN Yu-xi1,2, HE Kong-ning1, ZHU Yan-yan1, LU Xin-jian1, ZHANG Jin-hu1, SUN Yue-qiang1
1. College of Soil and Water Conservation in Beijing Forestry University, Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China;
2. Inner Mongolia Academy of Forestry Sciences, Huhhot 010010, China
关键词:
沙柳; 净光合速率; 蒸腾速率; 水分利用效率; 光能利用效率
Keywords:
Sand Willow; net photosynthesis rate; transpiration rate; water use efficiency; solar energy utilization efficiency
分类号:
S152.7
摘要:
在半干旱的盐池沙区，运用Li-6400便携式光合测定系统，测定了3 a生沙柳在不同水分条件下叶片光合和蒸腾作用的光响应特性。结果表明：0～2 000 μmol/（m2·s）PAR范围内，沙柳在土壤水分为2%，4%，8%，12%时的光饱和点分别为1 340，1 520，1 550和1 633 μmol/（m2·s），随土壤含水量的增大而增大；Tr随PAR的增高不断增大；最大Pn分别为8.7，9.1，9.47和19.52 μmol/（m2·s）；维持较高的Pn，即净光合速率达到最大的80%时，最低光照强度均在500 μmol/（m2·s）以上；既保证较高的光能利用效率又维持较高的水分利用效率的光强600～1 500 μmol/（m2·s）。沙柳平均Pn随着土壤含水量的增大而增大，而平均WUE在土壤含水量为8%时达到最大值，因此，沙柳的光能利用效率和水分利用效率都比较好的SWC应该为8%左右。
Abstract:
The characteristics of responses of three-year-old sand willow leaves to light were measured under different soil moisture content,with a Li-6400 portable photosynthesis system.The results show that,within the range of 0～2 000 μmol/(m2·s) of PAR,1340,1520,1550 and 1 633 μmol/(m2·s) are the light saturation point (LSP) under a little different water content respectively;Tr is rising accordingly as the PAR increasingly enhanced;8.7,9.1,9.47 and 19.52 μmol/(m2·s) of that are the highest Pn point respectively;for keeping higher net photosynthesis rate,that is,as Pn reaches 80% of the highest point,the lowest PAR is over 500 μmol/(m2·s);for keeping higher water use efficiency (WUE),the amount of PAR is between 600～1 500 μmol/(m2·s).In the light of the average Pn and the average WUE,the SWC in which both the Solar Energy Utilization Efficiency and the Water Use Efficiency are all better is about 8%.

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备注/Memo

收稿日期:2007-7-13。
基金项目:国家“十一五”科技支撑计划项目（2006BAD26B0301）
作者简介:段玉玺（1964- ），男，内蒙古人，副研究员，博士研究生，主要从事林业生态工程研究。E-mail：duanyx6410@yahoo.com.cn
通讯作者:贺康宁（1962- ），男，教授，博士生导师，主要从事水土保持、林业生态工程、抗旱造林技术研究。E-mail：hkn@bjfu.edu.cn

更新日期/Last Update: 1900-01-01