干旱区生态环境知识资源中心(Arid): 充分供水下刺槐和侧柏苗木光合特性及水分利用效率的研究

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	充分供水下刺槐和侧柏苗木光合特性及水分利用效率的研究
其他题名	Characteristics of Photosynthesis and Water Use Efficiency of Robinia pseudoacacia and Platycladus orientalis Seedlings under Sufficient Soil Moisture
	张慕黎; 王进鑫; 李继文; 吉增宝; 薛设
ISSN	1001-7461
出版年	2009
卷号	24 期号:3 页码:27-32
中文摘要	采用人工控制土壤水分的方法(称重法),采用Li-6400便携式光合测定系统,对刺槐和侧柏苗木净光合速率、蒸腾速率、气孔导度、胞间CO_2浓度及其相应的环境因子进行了测定.结果表明:充分供水条件下,刺槐、侧柏苗木光合速率日变化呈"双峰"型曲线,均有不同程度的光合"午休"现象,且上午的光合速率明显高于下午.气孔导度受水分和光热胁迫的影响,日变化呈凹型曲线.胞间CO_2浓度受空气CO_2浓度和气孔导度的双重影响,呈现出早、晚高,正午低的日变化规律.水分利用效率最高值出现在上午较早的时分,且上午的水分利用效率明显高于下午.光能利用效率呈现出早、晚高,正午低的凹形日变化曲线.
英文摘要	In semi-arid region of Loess Plateau, the net photosynthetic rate, transpiration rate, stomatal conductance, intercellular CO_2 concentration of Robinia pseudoacacia and Platycladus orientalis seedlings and proportional factors were measured with the Li-6400 portable photosynthesis system under sufficient soil moisture. The results showed that the diurnal course of net photosynthetic rate displayed a "double peak" pattern and a typical "noon" pattern, net photosynthetic rate was higher in forenoon than that in afternoon. Stomatal conductance was affected by the water, light and heat stress, which displayed a hollow pattern. The intercellular CO_2 concentration was affected by the atmosphere CO_2 concentration and stomatal conductance, which displayed a hollow pattern. The water use efficiency culminated in the early morning, water use efficiency was significantly higher in the morning than that in the afternoon. The energy use efficiency showed low-concave curve. According to Farquhar and Sharkey’s view, resulting in net photosynthetic rate reasons for the decline in both constraints and non-stomatal pores constraints, the decline of net photosynthetic rate in the morning was mainly caused by the constraints of the pore, the reduce of net photosynthetic rate at noon and afternoon was mainly attributed to the leaf cells to reduce the carboxylation efficiency.
中文关键词	充分供水 ; 刺槐 ; 侧柏 ; 光合特性 ; 水分利用效率
英文关键词	sufficient soil moisture Robinia pseudoacacia Platycladus orientalis photosynthetic characteristics water use efficiency
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:3606095
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224311
作者单位	西北农林科技大学资源与环境学院, 杨凌, 陕西 712100, 中国
推荐引用方式 GB/T 7714	张慕黎,王进鑫,李继文,等. 充分供水下刺槐和侧柏苗木光合特性及水分利用效率的研究[J]. 西北农林科技大学,2009,24(3):27-32.
APA	张慕黎,王进鑫,李继文,吉增宝,&薛设.(2009).充分供水下刺槐和侧柏苗木光合特性及水分利用效率的研究.,24(3),27-32.
MLA	张慕黎,et al."充分供水下刺槐和侧柏苗木光合特性及水分利用效率的研究".24.3(2009):27-32.