摘要
运用Yaxin-1102便携式光合蒸腾仪,于2014年1月至3月对北京市房山区的设施番茄和草莓的光合作用进行连续测定.通过分析棚温、光合有效辐射以及番茄和草莓的光合速率随空气质量指数的变化趋势,探讨空气质量对不同果蔬品种光合作用的影响.结果表明:随着空气质量指数的增加,番茄棚和草莓棚的棚温、光合有效辐射以及光合速率都随之减小,大气污染对光照的限制是影响设施蔬菜光合作用的主要因素.无论是否受到大气污染的影响,番茄和草莓的光合速率都与光合有效辐射和棚温呈正相关关系.空气质量指数低于三级轻度污染时,番茄和草莓的光合速率主要受到光合有效辐射的影响;当空气质量指数为四级中度污染以上时,番茄的光合速率主要受到光合有效辐射的影响,而草莓的光合速率主要受到棚温的影响.因此,当空气质量指数处于四级中度污染以上时,番茄棚应通过补光来提高光合速率,而草莓棚则需通过增温来维持光合速率.
Portable photosynthesis system Yaxin-1102 was used to measure the photosynthesis of tomato and strawberry under greenhouse condition from January to March in 2014. The objectives of our study were to a） analyze the variation of temperature（T）, photosynthetically active radiation（PAR） and photosynthesis（Pn） of tomato and strawberry under change of air quality index（AQI） and b） examine the effects of air quality influencing photosynthesis in different fruits and vegetables. The results showed that T, PAR and Pndecreased as the increasing AQI, and the limitation of air pollution on PAR was the main factor for the decreasing photosynthesis. There was a positive correlation between PAR, T and Pnunder different AQI. When AQI was lower than level 3, PAR was the main factor influencing photosynthesis of both tomato and strawberry, but the greater effect of PAR on photosynthesis of tomato while T on strawberry when AQI was higher than level 4. Therefore, fill light was used to promote photosynthesis for tomato, whereas, improving temperature was used for strawberry during serious air conditions.
出处
《农业科学研究》
2015年第1期1-4,24,共5页
Journal of Agricultural Sciences
关键词
空气质量指数
光合作用
番茄
草莓
air quality index
photosynthesis
tomato
strawberry
