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| 毛乌素沙地樟子松和油松人工林光合生理特性 | |
| 引用本文： | 丁晓纲,何茜,李吉跃,张方秋,刘育贤.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(1):215-219. |
| 作者姓名： | 丁晓纲 何茜 李吉跃 张方秋 刘育贤 |
| 作者单位： | 1. 广东省林业科学研究院,广州,510520;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. 华南农业大学,广州,430070 3. 广东省林业科学研究院,广州,510520 4. 绵阳市林业科技推广中心,四川,绵阳,621000 |
| 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) |
| 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3.63μmolCO2/mmolH2O,油松水分利用效率生长季均值为3.22μmolCO2/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。 |
| 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 |
The Photosynthetic Characteristics of Pinus Sylvestris var, Mongolica and Pinus Tabulae formis in Mu Us Sandland |
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| DING Xiao-gang,HE Qian,LI Ji-yue,ZHANG Fang-qiu,LIU Yu-xian.The Photosynthetic Characteristics of Pinus Sylvestris var, Mongolica and Pinus Tabulae formis in Mu Us Sandland[J].Research of Soil and Water Conservation,2011,18(1):215-219. | |
| Authors: | DING Xiao-gang HE Qian LI Ji-yue ZHANG Fang-qiu LIU Yu-xian |
| Institution: | 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 510520,3.College of Forestry,South China Agricultural University,Guangzhou 430070,4.Forestry Technology Extended Central Station of Mianyang,Mianyang,Sichuan 621000,China) |
| 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 th... |
| Keywords: | Pinus sylvestris var mongolica Pinus tabulaeformis gas exchange net photosynthetic rate water use efficiency Mu Us sandland |
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