|Table of Contents|

Studies on Orchard Microclimate Factors to Improve Grape Net Photosynthetic Rate and Transpiration Rate

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2020年01
Page:
27-33
Research Field:
Publishing date:

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Title:
Studies on Orchard Microclimate Factors to Improve Grape Net Photosynthetic Rate and Transpiration Rate
Author(s):
ZHANG Jianghui; LIU Hongbo; BAI Yungang; YANG Xudong; DING Ping
(Xinjiang Research Institute of Water Resources and Hydropower,Urumqi,Xinjiang 830049)
Keywords:
grape; net photosynthetic rate; transpiration rate; microclimate factor
PACS:
-
DOI:
10.11937/bfyy.20191609
Abstract:
As the main characteristic fruit of Tuha area in Xinjiang,grape is limited by the climate of drought,lack of rain and high evaporation,which has a great impact on grape yield.At the same time,due to the widespread use of ground furrow irrigation for grape irrigation,water consumption increases,resulting in water problem.Increasing needing resources had led to problems such as excessive irrigation quotas,high consumption and inefficiency,and extensive field management in water management.On the basis of drip irrigation technology,the photosynthesis parameters,temperature and humidity of grape growth period were measured by using mist micro-spray control technology,and the correlation between grape net photosynthetic rate and climatic factors,transpiration rate and climatic factors was analyzed.Determine the threshold range of microclimate factors for high-quality yield increase of grapes.The results showed that，the photosynthetic rate was parabolic with leaf temperature.The threshold values of PN and T were 22.05 μmol?m-2?s-1 and 36.19 ℃ in fruit set,and 20.33 μmol?m-2?s-1 and 35.81 ℃ in fruit enlargement；the thresholds of PN and T in the ripening period of fruit were 11.15 μmol?m-2?s-1 and 37.52 ℃.Similarly,the threshold values of PN and RH in fruit setting period were 22.14 μmol?m-2?s-1 and 47.08%；the threshold values of PN and RH in fruit enlargement period were 19.91 μmol?m-2?s-1 and 40.12%；The thresholds of PN and RH during fruit ripening were 10.96 μmol?m-2?s-1 and 25.24%.Both the transpiration rate and the air temperature have a single peak relationship,the fruit setting period threshold is 37.46 ℃,the fruit expansion period threshold is 39.34 ℃,and the fruit ripening period threshold is 37.58 ℃.The transpiration rate and relative humidity of air increased first and then decreased.The fruit setting period threshold was 44.35%,the fruit expansion period threshold was 33.70%,and the fruit ripening period threshold was 25.14%.The test results show that the suitable temperature and humidity thresholds for grape fruit setting are 36.19-37.46 ℃ and 44.35%-47.08%；the suitable temperature and humidity thresholds for fruit enlargement are 35.81-39.34 ℃ and 33.70%-40.12%；The appropriate temperature and humidity thresholds were 37.52-37.58 ℃ and 25.14%-25.24%.

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Last Update: 2020-01-14