Abstract This study designed 3 treatments including optical radiation，matrix moisture content + return
EC sensor，and time sequence irrigation decision，to investigate irrigation decision for substrate cultivation
of high quality tomato，through monitoring tomato plant height，stem diameter，yield，quality and matrix
moisture content．The results showed that tomato growth vigor and yield based on optical radiation and matrix
moisture content + return EC sensor irrigation decision were superior to that by time sequence method．The fruit
sugar acid ratio was raised by 60.8% and 54.3%，respectively；lycopene contents were increased by 14.9% and
18.6%，respectively；irrigation fluid production efficiency were increased by 39.6% and 49.6%，respectively．
Thus，the compositive and automatic irrigation decision for high quality tomato has provided model support for
realization of intelligent water/fertilizer management．
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Received: 21 May 2019
Published: 26 August 2019
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