Diagnosis of crop moisture condition from variable differential in stem diameter of tomato
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DOI：10.7606/j.issn.1000-7601.2005.03.09
Key Words: moisture diagnosis  variable differential in stem diameter  tomato
Author NameAffiliation
MENG Zhao-jiang College of Agronomy，Nanjing Agricultural University，Nanjing 210095，China；Farmland Irrigation Research Institute，CAAS，Xinxiang，Henan 453003，China 
DUAN Ai-wang Farmland Irrigation Research Institute，CAAS，Xinxiang，Henan 453003，China 
BIAN Xin-min College of Agronomy，Nanjing Agricultural University，Nanjing 210095，China 
LIU Zu-gui Farmland Irrigation Research Institute，CAAS，Xinxiang，Henan 453003，China 
ZHANG Ji-yang Farmland Irrigation Research Institute，CAAS，Xinxiang，Henan 453003，China 
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Abstract:
      In the greenhouse，by conducting pot and field experiments，the diagnosis method of crop moisture content from variable differential in stem diameter of tomato was studied．The results showed that the shrinking and swelling in stem diameter was closely related to the moisture content status within the plant，and variable differential in stem diameter （ ΔSd） could reflect plant moisture content condition sensitively，duly and accurately．This diagnosis method is characterized for its portability，stability，nondestruction to plant tissue，continuous monitoring and automatic logging as compared with other methods．
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