JIN Feng-xia,MA Dong-mei,WU Dong-bo,et al.Study on Ecophysiological Characteristics of Leaf Photosynthesis of Different Planting Years Alfalfa[J].Northern Horticulture,2013,37(22):70-73.
不同种植年限苜蓿叶片光合生理生态特性的研究
- Title:
- Study on Ecophysiological Characteristics of Leaf Photosynthesis of Different Planting Years Alfalfa
- 文章编号:
- 1001-0009(2013)22-0070-04
- 分类号:
- S 551+.7
- 文献标志码:
- A
- 摘要:
- 以2～6 a生苜蓿为研究对象，研究了不同种植年限苜蓿光合生理生态特性的季节性变化。结果表明：不同种植年限苜蓿的叶片光合速率（Pn）、蒸腾速率（Tr）、气孔导度（Gs）、叶面温度（TL）随着季节的推移总体呈下降趋势，胞间CO2浓度（Ci）、光合有效辐射（PAR）变化趋势相反；随种植年限的增加，叶片Pn和Tr总体呈递增趋势，而Gs和Ci的变化规律不明显，且5 a生和6 a生苜蓿Pn、Tr、Gs均最高，Ci最低，其生产能力较强；各生理生态因子间存在一定的相关性，且相关关系各异，相关程度也不同。
- Abstract:
- Taking 2～6 years alfalfa as test material,the seasonal changes of photosynthetic ecophysiological characteristics of different planting years alfalfa were studied.The results showed that,leaf photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductance(Gs),leaf temperature(TL) of different planting years alfalfa showed a overall downward trend with seasons,the changes of intercellular CO2 concentration (Ci) and photosynthetic active radiation (PAR) were opposite.Along with the increase of planting age,the overall changes of leaf Pn and Tr were increasing,and the Gs and Ci variation were not obvious,5-year-old and 6-year-old alfalfa Pn,Tr,Gs were the highest,Ci was the lowest,and the production ability was stronger.There was a certain correlation between the physiological and ecological factors,and different correlation,correlation degree were also different.
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备注/Memo
第一作者简介：金风霞（1989-），女，宁夏同心人，硕士研究生，研究方向为作物栽培与耕作学。E-mail:544698578@qq.com.
责任作者：许兴（1959-），男，教授，博士生导师，现主要从事作物栽培生理与分子生物学及生态农业研究工作。E-mail:xuxingscience@126.com.
基金项目：国家“十一五”科技支撑计划资助项目(2011BAC07B03)；
宁夏农发办资助项目（NTKJ-2012-12；NTKJ-2013-09(1)）。
收稿日期：2013-06-24