| 空气湿度对高温下番茄光合作用及坐果率的影响 |
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| 引用本文： | 薛义霞,李亚灵,温祥珍.空气湿度对高温下番茄光合作用及坐果率的影响[J].园艺学报,2010,37(3):397-404. |
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| 作者姓名： | 薛义霞 李亚灵 温祥珍 |
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| 作者单位： | (山西农业大学园艺学院，山西太谷 030801；山西师范大学生命科学学院，山西临汾 041000) |
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| 摘 要： | 利用人工气候室，研究了空气湿度对高温下番茄幼苗光合作用及坐果率的影响。设置3 个空气相对湿度处理，即70% ± 5%（高湿处理）、55% ± 5%（中湿处理）和不加湿的40% ~ 50%的对照（低湿处理）。结果表明：在10:00 至16:00 平均温度为33 ~ 43 ℃的高温条件下，高湿处理显著促进了番茄叶片的蒸腾速率和净光合速率，并且减轻或消除了光合“午休”，测定日内9:00 至17:00 的蒸腾累积值和净光合累积值分别比对照提高了116% ~ 133%和31% ~ 343%，坐果率显著高于低湿处理，达到48%；中湿处理的净光合速率和坐果率与对照没有显著差异。表明在30 ℃以上的高温条件下，70%的相对湿度有利于光合作用的增强和坐果率的提高。
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| 关 键 词： | 番茄 高温 空气湿度 光合特性 坐果率 |
| 收稿时间： | 2009-12-07 |
Effects of Air Humidity on the Photosynthesis and Fruit-set of Tomato Under High Temperature |
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| XUE Yi-xia,LI Ya-ling,WEN Xiang-zhen.Effects of Air Humidity on the Photosynthesis and Fruit-set of Tomato Under High Temperature[J].Acta Horticulturae Sinica,2010,37(3):397-404. |
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| Authors: | XUE Yi-xia LI Ya-ling WEN Xiang-zhen |
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| Institution: | (;1.College of Horticulture，Shanxi Agricultural University，Taigu，Shanxi 030801，China； ;2.College of Life Science，Shanxi Normal University，Linfen，Shanxi 041000，China) |
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| Abstract: | The effects of air relative humidity(RH)on the photosynthesis and fruit-set of tomato seedling under high temperature were investigated in growth chambers.Three air relative humidity treatments from 10:00 to 16:00 were 70% ± 5%(high RH),55%±5%(middle RH)and non-humidification(low RH,as control).The results showed under the high temperature(the average temperature from10:00 to 16:00 was 33-43 ℃),high RH treatment significantly promoted transpiration rate and net photosynthetic rate,also decreased or eliminated the photosynthetic midday depression compared with low RH treatment.Hence,the cumulative value of transpiration and photosynthesis from 9:00 to 17:00 of high RH treatment were 116%-133% and 31%-343% higher than that of low RH treatment,respectively.The fruit-set rate of high RH treatment was up to 48% and significantly higher than low RH treatment.However,photosynthesis and fruit-set rate of middle RH treatment were not significantly different compared with that of low RH treatment.As a conclusion,relative humidity of 70%(high RH)improved photosynthesis and fruit-set of tomato under high temperature above 30 ℃. |
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| Keywords: | tomato high temperature air relative humidity: photosynthesis characteristics fruit-set |
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