Analysis on photosynthetic characteristics of red globe grape in different cultivation modes

In order to analyze photosynthetic characteristics of red globe grape in different cultivation modes duringgrowth period, this paper set three modes, including red globe grape in sunlight greenhouse (greenhouse) to promote, plastic greenhouse (cold house) to promote early or to delay, and detectecl the facility environment and grape photosyntheticcharacteristic. The results showed that, the chlorophyllcontent in leaves of grape under three cultivation modes during growth period was from 1.2 mg/g to 2.2 mg/g. The diurnal photosynthetic rate curves of grape leaves in sunlight greenhouse and plastic greenhouse during blossom and early growth period were single peak curves. While the diurnal photosynthetic rate curve of grape leaves during berry growth period was bimodal curve. Whether single peak or bimodal the daily photosynthetic rate curve of grape leaves was, it did not necessarily link to the time when intercellular CO2 concentration reached minimum. In plastic greenhouse delay cultivation, the daily photosynthetic rate curve of grape leaves during growth period showed a single peak curve. The diurnal change of intercellular CO2 concentration curve of grape leaves during growth period in three cultivation patterns showed “V”shape, it meant that intercellular CO2 concentration decreased first and then increased, but the time to the lowest value was not the same.