[1]丁晓纲,何茜,李吉跃,等.毛乌素沙地樟子松和油松人工林光合生理特性[J].水土保持研究,2011,18(01):215-219.
　DING Xiao-gang,HE Qian,LI Ji-yue,et al.The Photosynthetic Characteristics of Pinus Sylvestris var. Mongolica and Pinus Tabulaeformis in Mu Us Sandland[J].Research of Soil and Water Conservation,2011,18(01):215-219.
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毛乌素沙地樟子松和油松人工林光合生理特性

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 18 期数: 2011年01期 页码: 215-219 栏目: 出版日期: 2011-02-20
Title:
The Photosynthetic Characteristics of Pinus Sylvestris var. Mongolica and Pinus Tabulaeformis in Mu Us Sandland
作者:
丁晓纲1,2, 何茜3, 李吉跃3, 张方秋2, 刘育贤4
1. 北京林业大学 省部共建森林培育与保护教育部重点实验室, 北京 100083;
2. 广东省林业科学研究院, 广州510520;
3. 华南农业大学, 广州 430070;
4. 绵阳市林业科技推广中心, 四川 绵阳 621000
Author(s):
DING Xiao-gang1,2, HE Qian3, LI Ji-yue3, ZHANG Fang-qiu2, LIU Yu-xian4
1. The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083, China;
2. Guangdong Forest Research Institute, Guangzhou 510520, China;
3. College of Forestry, South China Agricultural University, Guangzhou 430070, China;
4. Forestry Technology Extended Central Station of Mianyang, Mianyang, Sichuan 621000, China
关键词:
樟子松; 油松; 气体交换; 净光合速率; 水分利用效率; 毛乌素沙地
Keywords:
Pinus sylvestris var.mongolica; Pinus tabulaeformis; gas exchange; net photosynthetic rate; water use efficiency; Mu Us sandland
分类号:
S718.43
摘要:
利用Li-6400便携式气体分析系统，在自然条件下对毛乌素沙地腹地樟子松和油松人工林生长季叶片气体交换、水分利用效率及相关环境因子进行测定，同时探讨了影响樟子松、油松光合速率的内外因素。结果表明：生长季内毛乌素地区油松和樟子松的光合速率、蒸腾速率都表现出一定的日变化规律，都呈单峰型变化曲线；6月、7月、8月针叶树水分利用效率曲线呈下降趋势，上午时段的水分利用效率明显高于下午时段的水分利用效率。5月和9月针叶树水分利用效率日变化呈“W”型曲线，樟子松水分利用效率生长季均值为3.63 μmolCO2/mmolH2O，油松水分利用效率生长季均值为3.22 μmolCO2/mmolH2O，樟子松的水分利用效率始终高于油松。樟子松的净光合速率主要受光合有效辐射、气孔导度和胞间CO2浓度的影响，限制油松净光合速率的主要因子是光合有效辐射PAR和气孔导度。
Abstract:
In the growing season, the daily gas exchange, water use efficiency of Pinus sylvestris var. mongolica and Pinus tabulaeformis in Mu Us sandland were measured with a portable Li-6400 gas analysis system under natural conditions. The results showed that the diurnal courses of net photosynthetic rate and transpiration rate display a singal-peak pattern. Water use efficiency culminates in the early morning. The maximum and the average value of the net photosynthesis of the Pinus sylvestris var. mongolica is larger than that of the Pinus tabulaeformis. The average value of the water use efficiency of Pinus sylvestris var. mongolica is 3.63 μmol CO2/mmolH2O, which was higher than that of Pinus tabulaeformis (3.22 μmol CO2/mmol H2O). Regression analysis showed that the net photosynthetic rate of Pinus sylvestris var. mongolica was controlled by PAR, Gs and Ci, while for Pinus tabulaeformis was PAR and Gs.

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备注/Memo

收稿日期:2010-7-29;改回日期:2010-8-16。
基金项目:国家高技术研究发展计划（863计划）课题子课题“西北半干旱生态植被建设区节水农业综合示范”（2002AA2Z4281）
作者简介:丁晓纲（1978- ），男，助理研究员，主要研究方向：抗旱造林技术。E-mail：dxgblue@hotmail.com
通讯作者:李吉跃（1959- ），男，教授，博士生导师，主要研究方向：森林培育及栽培生理生态。E-mail：ljyymy@vip.sina.com

更新日期/Last Update: 1900-01-01