Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (22): 120-124.doi: 10.11924/j.issn.1000-6850.casb15040030

Special Issue: 园艺

Previous Articles     Next Articles

Research on Daily Variation of Sap Flow of Apple Trees Under Different Weather Conditions

Xu Haihong1, Guo Xianghong2, Qiu Qunyi2   

  1. (1Pomology Institute, Shanxi Academy of Agricultural Sciences, Taigu Shanxi 030815;2College of Water Science and Engineering, Taiyuan University of Technology, Taiyuan 030024)
  • Received:2015-04-03 Revised:2015-05-20 Accepted:2015-05-25 Online:2015-08-20 Published:2015-08-20

Abstract: Through study on the changing rule of sap flow of apple trees, the variation of water consumption of the canopy (field transpiration) is expected to be made clear. The author set TDP stem sap flow gauge on apple tree trunk, collected data under 3 different weather conditions, and studied the changing rule of trunk sap flow with time and the change rule after irrigation. Results showed that sap flow of apple tree under different weather conditions was in an order as: sunny day> cloudy day> rainy day. On sunny and cloudy days, the variation showed a single peak curve just like the shape of the Chinese character ‘几’, while it showed a multi-peak curve on rainy days. When studying the changing rule of trunk sap flow with time, it was found that the order of the maximum value during the day from June to September was June> September> July> August, while the order of the average daily value was June> August> July> September. When studying the variation of trunk sap flow after irrigation, it was found that the value on the day irrigated was the smallest during 5 days, no matter it was peak value or daily value. The sap flow changing rule of apple trunk found in the study provided basic data for preliminary study on field transpiration of apple trees.