Daily Variation Rule of Weather Factors and Its Affection on Photosynthetic Rate in Pumpkin Field(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Daily Variation Rule of Weather Factors and Its Affection on Photosynthetic Rate in Pumpkin Field

Author(s):: DU Li-jun1; SUN Li2; LI Xin-zheng-2; GAO Dan-mei2; 1.Weather Burea of Xinxiang City,Xinxiang,Henan 453003;
2.School of Horticulture and Landscape,Henan Institute of Science and Technology,Xinxiang,Henan 453003

Abstract:: Taking ‘Baimi 4’ pumpkin which cultured by Henan Institute of Science and Technology Pumpkin Research Group as material,and making the ‘Miben’ as the control(CK),CO₂ concentration in field,photosynthetically active radiation,humidity,temperature of the weather factors in pumpkin field were measured,and the effect factors of net photosynthetic rate were studied.The results indicated that the filed CO₂ concentration presented a U curve and ranged from 456.9～381.0 mg/kg.The maximum value of photosynthetic active radiation was 1 445.8 μmol?m^-2?s^-1?at 12:00.The air relative humidity was singe-peak and maximum value was 61.3%.The air temperature was singe-peak and maximum value was 36.8 ℃.The net photosynthetic rate of ‘Baimi 4’ and CK presented a double-peak curve,peak value occurred at 11:00 and 16:00,two valley appeared at 14:00 and exited significant photosynthesis ‘noon-rest’.

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Last Update: 2014-09-19