• 研究报告 •

### 高温高湿交互对设施番茄叶片光合特性的影响

1. (1南京信息工程大学气象灾害预报预警与评估协同创新中心， 南京 210044；2江苏省农业气象重点实验室， 南京 210044；3上海市气候中心， 上海 200030)
• 出版日期:2018-01-10 发布日期:2018-01-10

### Effect of high humidity and high temperature interaction on photosynthetic characteristics of greenhouse tomato crops.

YANG Shi-qiong1, YANG Zai-qiang1,2*, WANG Lin1, LI Jun3, ZHANG Man-yi1， LI Kai-wei1#br#

1. (1Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China; 2Jiangsu Provincial Key Laboratory of Agrometeorology, Nanjing 210044, China; 3Shanghai Climate Center, Shanghai 200030, China).
• Online:2018-01-10 Published:2018-01-10

Abstract: In order to reveal the effects of high temperature and high humidity interaction on photosynthetic characteristics of tomato leaves, a L9 (3-3) orthogonal test with tomato cv. ‘Jinfen 5’ was carried out in artificial climate chamber. To measure the photosynthetic parameters and fluorescence dynamic parameters of different treatments, three levels of influencing factors were set: Temperature of 35 ℃ (daytime)/18 ℃ (nighttime), 38 ℃/18 ℃, 41 ℃/18 ℃), relative air humidity of daytime (50%±5%, 70%±5%, 90%±5%), treatment days (3, 6, 9 d), and 28 ℃/18 ℃, 45%-55% as a control (CK). The results showed that the net photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), water use efficiency (WUE), PSII maximum quantum efficiency (Fv/Fm), photochemical quenching coefficient (qP) and electron transfer rate (ETR) were significantly lower than the CK, while the intercellular CO2 concentration (Ci) was the lowest in the 38 ℃/18 ℃, 70% air humidity treatment, stomatal limitation (Ls) was the lowest in the 38 ℃/18 ℃, 90% air humidity treatment. Compared to the CK, leafPn under temperatures of 38 ℃/18 ℃, 35 ℃/18 ℃, 41 ℃/18 ℃, and humidity of 70%, 50%, 90% decreased by 30.1%, 21.4%, 51.9%, 31.2%, 31.4% and 38.6%, respectively. No obvious differences in these indicators were observed among the treatment durations of 3 days, 6 days and 9 days. High temperature was the main stress factor affecting the Pn of tomato(P<0.05), and high humidity was a second stress factor; the interaction of high temperature and high humidity had a significant effect onPn (P<0.01). This study confirmed that when the maximum air temperature rises above 38 ℃, appropriate increase in air relative humidity to 65%-75% can effectively reduce the heat stress on tomato damage.