The net photosynthetic rate of Mi-ben Pumpkin and the effecting factors of PAR, temperature, air humidity, and CO2 content and transpiration rate were studied. The net photosynthetic rate was double-peak and exited significant photosynthesis “noon-rest” on sunny day. It was single-peak on cloudy day. The effecting factors had significant day-change Character. The solar radiation was powerful on sunny noon. The average PAR was 1246.3?mol/(m2·s) from 12:00 to 15:00. The temperature was high on sunny noon. The average air temperature was 31.7℃ and the leaf temperature was 37.4℃ from 12:00 to 15:00. The air humidity was low and was 42.3% from 12:00 to 15:00. These factors were main environment factors leading to “photosynthesis noon-rest”.
Liu Zhenwei, Li Xinzheng, Sun Li
. Net Photosynthetic Rate of Pumpkin in Fruit-setting Period and the Day Change Character of Effecting Factors[J]. Chinese Agricultural Science Bulletin, 2005
, 21(3)
: 233
-233
.
DOI: 10.11924/j.issn.1000-6850.0503233
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