Calibration and simulation of carbohydrate balance on double cropping system in ‘Kyoho’ grapevines
Date Issued
2010
Date
2010
Author(s)
Chang, Ben-Min
Abstract
Double cropping system has been applied to grape production in Taiwan for four decades. According to the season of harvest, the cropping cycles are defined as winter and summer cropping cycles. Obviously, the growth of two cropping cycles experiences different weather and causes noticeable differences on fruit composition and yield. Weather effect on vine growth might further affect photosynthesis capability and respiration. Therefore, carbon balance trend of the vine changes with weather experienced. To test this hypothesis, ‘VitiSim’ a carbon balance model was adapted to on ‘Kyoho’ grapevines grown under a double cropping system in Taiwan. Simulations based on weather data of two cropping cycles were conducted. The model was calibrated to fit the leaf area and berry fresh weight development in 2009 summer cropping season. Simulations showed that CO2 accumulation of a vine was higher in 2009 summer cropping season than the long term average weather condition. Simulation based on long-term data suggested CO2 accumulation in the two cropping season was similar. Whole-canopy photosynthesis quickly increased in the early season but declined after the mid season during the winter cropping cycle. On the other hand, during the summer cropping cycle, initial whole-canopy photosynthesis was slow but consistently increased during the season. The simulation suggested summer season might have higher crop capacity because fruit demand was satisfied more than winter.
Subjects
carbohydrate supply and demand
photosynthesis
respiration
temperature
light interception
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-99-R97628112-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):12a5d012b7235da2b9ea099c518b8ea4